SDS800X HD Series
Digital Oscilloscope
User Manual
EN01A

SDS800XHD Series User ManualContents
1

Introduction ............................................................................................................ 1

2

Important Safety Information ................................................................................ 2
2.1

General Safety Summary .................................................................................................... 2

2.2

Safety Terms and Symbols ................................................................................................. 4

2.3

Working Environment .......................................................................................................... 5

2.4

Cooling Requirements......................................................................................................... 6

2.5

Power and Grounding Requirements ................................................................................. 6

2.6

Cleaning .............................................................................................................................. 7

2.7

Abnormal Conditions ........................................................................................................... 7

2.8

Safety Compliance .............................................................................................................. 8

Informations essentielles sur la sécurité ................................................................... 9
Exigence de Sécurité .................................................................................................................... 9
Termes et symboles de sécurité ..................................................................................................11
Environnement de travail ............................................................................................................ 12
Exigences de refroidissement ..................................................................................................... 13
Connexions d'alimentation et de terre ........................................................................................ 13
Nettoyage .................................................................................................................................... 14
Conditions anormales ................................................................................................................. 15
Conformité en matière de sécurité .............................................................................................. 15

3First Steps ............................................................................................................ 16
3.1

Delivery Checklist .............................................................................................................. 16

3.2

Quality Assurance ............................................................................................................. 16

3.3

Maintenance Agreement ................................................................................................... 16

4

Document Conventions ....................................................................................... 17

5

Getting Started ..................................................................................................... 18

6

5.1

Mechanical Dimensions .................................................................................................... 18

5.2

Adjust the Supporting Legs ............................................................................................... 18

5.3Power on ........................................................................................................................... 19

5.4

Shut down ......................................................................................................................... 19

5.5

System Information ........................................................................................................... 20

5.6

Install Options.................................................................................................................... 20

Quick Start ............................................................................................................ 21

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6.1

Front Panel Overview........................................................................................................ 21

6.2

Rear Panel Overview ........................................................................................................ 22

6.3

Connecting to External Devices/Systems ......................................................................... 23
6.3.1

Power Supply .......................................................................................................... 23

6.3.2

LAN .......................................................................................................................... 23

6.3.3

USB Peripherals ...................................................................................................... 23

6.3.4

Auxiliary Output ....................................................................................................... 23

6.3.5

Waveform Generator ............................................................................................... 23

6.3.6

Probes ..................................................................................................................... 24

6.3.7

Logic Probe.............................................................................................................. 25

Touch Screen Display .......................................................................................... 26
7.1

Overview ........................................................................................................................... 26

7.2

Menu Bar ........................................................................................................................... 27

7.3

Grid Area ........................................................................................................................... 27

7.4

Channel Descriptor Box .................................................................................................... 29

7.5

Timebase and Trigger Descriptor Boxes........................................................................... 30

7.6

Dialog Box ......................................................................................................................... 31

7.7

Touch Gestures ................................................................................................................. 34

7.8

Mouse and Keyboard Operation ....................................................................................... 35

7.9

Choosing the Language .................................................................................................... 35

Front Panel ........................................................................................................... 36
8.1

Overview ........................................................................................................................... 36

8.2

Vertical Control .................................................................................................................. 37

8.3

Horizontal Control ............................................................................................................. 38

8.4

Trigger Control .................................................................................................................. 38

8.5

Run/Stop

Button ............................................................................................................. 38

8.6

Auto Setup

Button .......................................................................................................... 39

8.7

Cursors Control ................................................................................................................. 39

8.8

Universal Knob .................................................................................................................. 39

8.9

Other Buttons .................................................................................................................... 39

Multiple Approaches to Recall Functions .......................................................... 41
9.1

Menu Bar ........................................................................................................................... 41

9.2

Descriptor Box ................................................................................................................... 41

9.3

Shortcut Button on the Front panel ................................................................................... 42

10 Quickly Capture the Signal ................................................................................. 43

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11 Vertical Setup ....................................................................................................... 44
11.1 Turn on/off a Channel........................................................................................................ 44
11.2 Channel Setup................................................................................................................... 45

12 Digital Channels ................................................................................................... 49
12.1 Overview ........................................................................................................................... 49
12.2 Enable/Disable the Digital Channels ................................................................................ 50
12.3 Digital Channel Setup ....................................................................................................... 51
12.4 System .............................................................................................................................. 54

13 Horizontal and Acquisition Setup ....................................................................... 56
13.1 Timebase Setup ................................................................................................................ 56
13.2 Acquisition Setup .............................................................................................................. 57
13.2.1 Overview .................................................................................................................. 57
13.2.2 Acquisition ............................................................................................................... 58
13.2.3 Memory Management.............................................................................................. 59
13.2.4 Roll Mode................................................................................................................. 60
13.2.5 Sequence................................................................................................................. 60
13.3 History ............................................................................................................................... 63

14 Zoom ..................................................................................................................... 66
15 Trigger ................................................................................................................... 69
15.1 Overview ........................................................................................................................... 69
15.2 Trigger Setup ..................................................................................................................... 70
15.3 Trigger Level...................................................................................................................... 71
15.4 Trigger Mode ..................................................................................................................... 71
15.5 Trigger Type ...................................................................................................................... 73
15.5.1 Overview .................................................................................................................. 73
15.5.2 Edge Trigger ............................................................................................................ 74
15.5.3 Slope Trigger ........................................................................................................... 74
15.5.4 Pulse Trigger ........................................................................................................... 75
15.5.5 Video Trigger ........................................................................................................... 77
15.5.6 Window Trigger........................................................................................................ 80
15.5.7 Interval Trigger ......................................................................................................... 81
15.5.8 Dropout Trigger........................................................................................................ 82
15.5.9 Runt Trigger ............................................................................................................. 82
15.5.10 Pattern Trigger ......................................................................................................... 83
15.5.11 Qualified Trigger ...................................................................................................... 84
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15.5.12 Nth Edge Trigger ..................................................................................................... 85
15.5.13 Delay Trigger ........................................................................................................... 86
15.5.14 Setup/Hold Trigger................................................................................................... 86
15.5.15 Serial Trigger ........................................................................................................... 86
15.6 Trigger Source................................................................................................................... 87
15.7 Holdoff ............................................................................................................................... 87
15.8 Trigger Coupling ................................................................................................................ 88
15.9 Noise Reject ...................................................................................................................... 88

16 Serial Trigger and Decode ................................................................................... 90
16.1 Overview ........................................................................................................................... 90
16.2 I2C Trigger and Serial Decode.......................................................................................... 92
16.2.1 I2C Signal Settings .................................................................................................. 92
16.2.2 I2C Trigger ............................................................................................................... 93
16.2.3 I2C Serial Decode ................................................................................................... 96
16.3 SPI Trigger and Serial Decode ......................................................................................... 97
16.3.1 SPI Signal Settings .................................................................................................. 97
16.3.2 SPI Trigger ............................................................................................................. 100
16.3.3 SPI Serial Decode ................................................................................................. 101
16.4 UART Trigger and Serial Decode ................................................................................... 101
16.4.1 UART Signal Settings ............................................................................................ 101
16.4.2 UART Trigger ......................................................................................................... 102
16.4.3 UART Serial Decode ............................................................................................. 102
16.5 CAN Trigger and Serial Decode...................................................................................... 102
16.5.1 CAN Signal Settings .............................................................................................. 103
16.5.2 CAN Trigger ........................................................................................................... 103
16.5.3 CAN Serial Decode ............................................................................................... 104
16.6 LIN Trigger and Serial Decode........................................................................................ 105
16.6.1 LIN Signal Settings ................................................................................................ 105
16.6.2 LIN Trigger ............................................................................................................. 105
16.6.3 LIN Serial Decode ................................................................................................. 106

17 Cursors ............................................................................................................... 107
17.1 Overview ......................................................................................................................... 107
17.2 Select and Move Cursors .................................................................................................113

18 Measurement ...................................................................................................... 115
18.1 Overview ..........................................................................................................................115
18.2 Set Parameters ................................................................................................................117
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18.3 Type of Measurement ..................................................................................................... 120
18.3.1 Vertical Measurement ............................................................................................ 120
18.3.2 Horizontal Measurement ....................................................................................... 122
18.3.3 Miscellaneous Measurements ............................................................................... 123
18.3.4 Delay Measurement .............................................................................................. 124
18.4 Trend ............................................................................................................................... 126
18.5 Track ................................................................................................................................ 126
18.6 Measurement Statistics ................................................................................................... 127
18.7 Statistics Histogram ........................................................................................................ 128
18.8 Simple Measurements .................................................................................................... 129
18.9 Gate ................................................................................................................................. 130
18.10 Amplitude Strategy .......................................................................................................... 131
18.11 Threshold ........................................................................................................................ 131
18.12 Hardware Frequency Counter......................................................................................... 132

19 Math .................................................................................................................... 133
19.1 Overview ......................................................................................................................... 133
19.2 Arithmetic ........................................................................................................................ 134
19.2.1 Addition / Subtraction / Multiplication / Division .................................................... 134
19.2.2 Identity / Negation.................................................................................................. 135
19.2.3 Average / ERES .................................................................................................... 135
19.2.4 Max-hold / Min-hold ............................................................................................... 136
19.3 Algebra ............................................................................................................................ 137
19.3.1 Differential.............................................................................................................. 137
19.3.2 Integral ................................................................................................................... 137
19.3.3 Square Root........................................................................................................... 138
19.3.4 Absolute ................................................................................................................. 139
19.3.5 Sign ........................................................................................................................ 139
19.3.6 Exp10..................................................................................................................... 140
19.3.7 Lg ........................................................................................................................... 140
19.3.8 Interpolate .............................................................................................................. 141
19.4 Filter................................................................................................................................. 143
19.5 Frequency Analysis ......................................................................................................... 144
19.6 Formula Editor ................................................................................................................. 152

20 Reference ........................................................................................................... 154
21 Search ................................................................................................................. 156
22 Navigate .............................................................................................................. 158
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23 Mask Test ............................................................................................................ 163
23.1 Overview ......................................................................................................................... 163
23.2 Mask Setup ..................................................................................................................... 164
23.2.1 Create Mask .......................................................................................................... 165
23.2.2 Mask Editor ............................................................................................................ 165
23.3 Pass/Fail Rule ................................................................................................................. 168
23.4 Operation......................................................................................................................... 168

24 Counter ............................................................................................................... 169
24.1 Overview ......................................................................................................................... 169
24.2 Mode................................................................................................................................ 170

25 Power Analysis .................................................................................................. 172
25.1 Overview ......................................................................................................................... 172
25.2 Power Quality .................................................................................................................. 173
25.3 Current Harmonics .......................................................................................................... 175
25.4 Inrush Current ................................................................................................................. 176
25.5 Switching Loss ................................................................................................................ 177
25.6 Slew Rate ........................................................................................................................ 180
25.7 Modulation ....................................................................................................................... 181
25.8 Output Ripple .................................................................................................................. 181
25.9 Turn On/Turn Off ............................................................................................................. 182
25.10 Transient Response ........................................................................................................ 183
25.11 PSRR............................................................................................................................... 184
25.12 Power Efficiency .............................................................................................................. 185
25.13 SOA ................................................................................................................................. 186

26 Bode Plot ............................................................................................................ 188
26.1 Overview ......................................................................................................................... 188
26.2 Configuration ................................................................................................................... 189
26.2.1 Connection............................................................................................................. 189
26.2.2 Sweep .................................................................................................................... 189
26.3 Display ............................................................................................................................. 191
26.4 Data Analysis................................................................................................................... 193

27 Display ................................................................................................................ 196
28 Arbitrary Waveform Generator ......................................................................... 203
28.1 Overview ......................................................................................................................... 203

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28.2 Wave Type....................................................................................................................... 204
28.3 Other Setting ................................................................................................................... 205
28.4 System ............................................................................................................................ 207

29 Save/Recall ......................................................................................................... 208
29.1 Save Type ....................................................................................................................... 208
29.2 File Manager ................................................................................................................... 209
29.3 Save and Recall Instances ..............................................................................................211

30 Utility ................................................................................................................... 215
30.1 System Information ......................................................................................................... 215
30.2 System Setting ................................................................................................................ 215
30.2.1 Language ............................................................................................................... 215
30.2.2 Screen Saver ......................................................................................................... 215
30.2.3 Beeper ................................................................................................................... 216
30.2.4 Auto Power-on ....................................................................................................... 216
30.2.5 Date/Time .............................................................................................................. 216
30.2.6 Reference Position Setting .................................................................................... 217
30.3 Save Button ..................................................................................................................... 219
30.4 Quick Action .................................................................................................................... 219
30.5 LAN Setting ..................................................................................................................... 220
30.6 Install Options.................................................................................................................. 221
30.7 Maintenance .................................................................................................................... 221
30.7.1 Upgrade ................................................................................................................. 221
30.7.2 Self-Test ................................................................................................................. 223
30.7.3 Self-Calibration ...................................................................................................... 225
30.7.4 Developer Options ................................................................................................. 226
30.8 Service ............................................................................................................................ 227
30.8.1 SMB File Share ..................................................................................................... 227
30.8.2 Web Server ............................................................................................................ 227
30.8.3 LXI.......................................................................................................................... 228

31 Remote Control .................................................................................................. 229
31.1 Web Browser ................................................................................................................... 229
31.2 Other Connectivity........................................................................................................... 230

32 Troubleshooting ................................................................................................. 231

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SDS800X HD Series User Manual

1

Introduction

A digital oscilloscope is a multi-functional instrument for displaying, analyzing, and storing electricalsignals. It is an indispensable tool for designing, manufacturing, and maintaining electronic equipment.
This user manual includes important safety and installation information related to the SDS800X HD
series of oscilloscopes and includes simple tutorials for the basic operation of the instrument.
The series includes the following models:Model

Analogy
Bandwidth

Maximum Sampling Rate

AnalogChannelSDS824X HD

200 MHz

2 GSa/s @ each channel

4

SDS814X HD

100 MHz

2 GSa/s @ each channel

4

SDS822X HD

200MHZ

2 GSa/s @ each channel

2

SDS812X HD

100 MHz

2 GSa/s @ each channel

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SDS800X HD Series User Manual2

Important Safety Information

This manual contains information and warnings that must be followed by the user for safe operationand to keep the product in a safe condition.

2.1

General Safety Summary

Carefully read the following safety precautions to avoid personal injury and prevent damage to the
instrument and any products connected to it. To avoid potential hazards, please use the instrument
as specified.
To Avoid Fire or Personal Injury.
Use Proper Power Line.
Only use a local/state-approved power cord for connecting the instrument to mains power sources.
Ground the Instrument.
The instrument grounds through the protective terra conductor of the power line. To avoid electric
shock, the ground conductor must be connected to the earth. Make sure the instrument is grounded
correctly before connecting its input or output terminals.
Connect the Signal Wire Correctly.
The potential of the signal wire is equal to the earth, so do not connect the signal wire to a high voltage.
Do not touch the exposed contacts or components.
Look over All Terminals’ Ratings.
To avoid fire or electric shock, please look over all ratings and signed instructions of the instrument.
Before connecting the instrument, please read the manual carefully to gain more information about
the ratings.
Equipment Maintenance and Service.
When the equipment fails, please do not dismantle the machine for maintenance. The equipment
contains capacitors, power supply, transformers, and other energy storage devices, which may cause
high voltage damage. The internal devices of the equipment are sensitive to static electricity, anddirect contact can easily cause irreparable damage to the equipment. It is necessary to return to thefactory or the company's designated maintenance organization for maintenance. Be sure to pull out
the power supply when repairing the equipment. Live line operation is strictly prohibited. The
equipment can only be powered on when the maintenance is completed and the maintenance isconfirmed to be successful.
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Identification of Normal State of Equipment.
After the equipment is started, there will be no alarm information and error information at the interface
under normal conditions. The curve of the interface will scan from left to right freely; if there is a popup window or button during the scanning process or there is an alarm or error prompt, the device may
be in an abnormal state. You need to view the specific prompt information. You can try to restart the
instrument to see if it corrects the error condition. If the fault information is still in place, do not use
the instrument for testing. Contact the manufacturer or the maintenance department designated by
the manufacturer to carry out maintenance before reusing the product.
Not Operate with Suspected Failures.
If you suspect that there is damage to the instrument, please let qualified service personnel check it.
Avoid Circuit or Wire Exposed Components Exposed.
Do not touch exposed contacts or components when the power is on.
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep the surface of the instrument clean and dry.
Only probe assemblies that meet the requirement of UL61010-031 and CAN/CSA-C22.2
No.61010-031 shall be used.
Only a lithium battery with the same specifications as the original battery should be used toreplace the battery on board.
Do not use the equipment for measurements on mains circuits. Do not use the equipment formeasurements on voltages exceeding the voltage ranges described in the manual. The
maximum additional transient voltage cannot exceed 1300 V.
The responsible body or operator should refer to the instruction manual to preserve theprotection afforded by the equipment. If the equipment is used in a manner not specified by
the manufacturer, the protection provided by the equipment may be impaired.
Any parts of the device and its accessories are not allowed to be changed or replaced, otherthan authorized by the manufacturer or agent.

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SDS800X HD Series User Manual

2.2

Safety Terms and Symbols

When the following symbols or terms appear on the front or rear panel of the instrument or in thismanual, they indicate special care in terms of safety.

This symbol is used where caution is required. Refer to the accompanying
information or documents to protect against personal injury or damage to the
instrument.

This symbol warns of a potential risk of shock hazard.

This symbol is used to denote the measurement ground connection.

This symbol is used to denote a safety ground connection.

This symbol shows that the switch is an On/Standby switch. When it is pressed,
the scope’s state switches between Operation and Standby. This switch does notdisconnect the device's power supply. To completely power off the scope, thepower cord must be unplugged from the AC socket after the oscilloscope is in thestandby state.

This symbol is used to represent alternating current, or "AC".
The “CAUTION” symbol indicates a potential hazard. It calls attention to a
CAUTION

procedure, practice, or condition which may be dangerous if not followed. Do notproceed until its conditions are fully understood and met.
The “WARNING” symbol indicates a potential hazard. It calls attention to a

WARNINGprocedure, practice, or condition that, if not followed, could cause bodily injury or
death. If a WARNING is indicated, do not proceed until the safety conditions are
fully understood and met.

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2.3

Working Environment

The design of the instrument has been verified to conform to EN 61010-1 safety standard per thefollowing limits:
Environment
The instrument is used indoors and should be operated in a clean and dry environment with anambient temperature range.
Note: Direct sunlight, electric heaters, and other heat sources should be considered when evaluating
the ambient temperature.

Warning: Do not operate the instrument in explosive, dusty, or humid environments.

Ambient Temperature
Operating: 0 ℃ to +50 ℃
Non-operation: -30 ℃ to +70 ℃
Note: Direct sunlight, radiators, and other heat sources should be taken into account when assessing
the ambient temperature.
Humidity
Operating: 5% ~ 90 %RH, 30 ℃, derate to 50 %RH at 50 ℃
Non-operating: 5% ~ 95% RH
AltitudeOperating: ≤3,000 m, 25 ℃
Non-operating: ≤15,000m
Installation (overvoltage) Category
This product is powered by mains conforming to installation (overvoltage) Category II.
Note: Installation (overvoltage) category I refers to situations where equipment measurement
terminals are connected to the source circuit. In these terminals, precautions are done to limit thetransient voltage to a correspondingly low level.
Installation (overvoltage) category II refers to the local power distribution level which applies toequipment connected to the AC line (AC power).

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SDS800X HD Series User Manual

Degree of Pollution
The oscilloscopes may be operated in environments of Pollution Degree II.
Note: Degree of Pollution II refers to a working environment that is dry and non-conductive pollution
occurs. Occasional temporary conductivity caused by condensation is expected.
IP Rating
IP20 (as defined in IEC 60529).

2.4

Cooling Requirements

This instrument relies on forced air cooling with internal fans and ventilation openings. Care must be
taken to avoid restricting the airflow around the apertures (fan holes) on each side of the scope. To
ensure adequate ventilation it is required to leave a 15 cm (6 inch) minimum gap around the sides of
the instrument.

CAUTION: Do not block the ventilation holes located on both sides of the scope.

CAUTION: Do not allow any foreign matter to enter the scope through the ventilation
holes, etc.

2.5Power and Grounding Requirements

The instrument operates with a single-phase, 100 to 240 Vrms (+/-10%) AC power at 50/60 Hz(+/-5%).
No manual voltage selection is required because the instrument automatically adapts to line voltage.
Depending on the type and number of options and accessories (probes, PC port plug-in, etc.), theinstrument can consume up to 80W of power.
Note: The instrument automatically adapts to the AC line input within the following ranges:

Voltage Range:

90 - 264 Vrms

Frequency Range:

47 - 63 Hz

The instrument includes a grounded cord set containing a molded three-terminal polarized plug and6

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SDS800X HD Series User Manuala standard IEC320 (Type C13) connector for making line voltage and safety ground connections. The
AC inlet ground terminal is connected directly to the frame of the instrument. For adequate protection
against electrical shock hazards, the power cord plug must be inserted into a mating AC outlet
containing a safety ground contact. Use only the power cord specified for this instrument and certified
for the country of use.

Warning: Electrical Shock Hazard!
Any interruption of the protective conductor inside or outside of the scope, ordisconnection of the safety ground terminal creates a hazardous situation.
Intentional interruption is prohibited.
The position of the oscilloscope should allow easy access to the socket. To make the oscilloscopecompletely power off, unplug the instrument power cord from the AC socket.
The power cord should be unplugged from the AC outlet if the scope is not to be used for an extended
period.

CAUTION: The outer shells of the front panel terminals (CH1, CH2, CH3, CH4) areconnected to the instrument’s chassis and therefore to the safety ground.

2.6

Cleaning

Clean only the exterior of the instrument, using a damp, soft cloth. Do not use chemicals or abrasive
elements. Under no circumstances allow moisture to penetrate the instrument. To avoid electricalshock, unplug the power cord from the AC outlet before cleaning.

Warning: Electrical Shock Hazard!
No operator serviceable parts inside. Do not remove covers.
Refer servicing to qualified personnel

2.7

Abnormal Conditions

Do not operate the scope if there is any visible sign of damage or has been subjected to severetransport stresses.
If you suspect the scope’s protection has been impaired, disconnect the power cord and secure theinstrument against any unintended operation.
Proper use of the instrument depends on the careful reading of all instructions and labels.
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Warning: Any use of the scope in a manner not specified by the manufacturer may
impair the instrument’s safety protection. This instrument should not bedirectly connected to human subjects or used for patient monitoring.

2.8

Safety ComplianceThis section lists the safety standards with which the product complies.
U.S. nationally recognized testing laboratory listing

UL 61010-1:2012/R: 2018-11. Safety Requirements for Electrical Equipment for Measurement,
Control, and Laboratory Use – Part 1: General Requirements.



UL 61010-2-030:2018. Safety Requirements for Electrical Equipment for Measurement, Control,and Laboratory Use – Part2-030: Particular requirements for testing and measuring circuits.

Canadian certification


CAN/CSA-C22.2 No. 61010-1:2012/A1:2018-11. Safety Requirements for Electrical Equipment
for Measurement, Control, and Laboratory Use – Part 1: General Requirements.



CAN/CSA-C22.2 No. 61010-2-030:2018. Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use – Part 2-030: Particular requirements for testing andmeasuring circuits.

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SDS800X HD Series User Manual

Informations essentielles sur la sécurité
Ce manuel contient des informations et des avertissements que les utilisateurs doivent suivre pour
assurer la sécurité des opérations et maintenir les produits en sécurité.

Exigence de Sécurité
Lisez attentivement les précautions de sécurité ci - après afin d 'éviter les dommages corporels et deprévenir les dommages aux instruments et aux produits associés. Pour éviter les risques potentiels,
utilisez les instruments prescrits.
Éviter l 'incendie ou les lésions corporelles.
Utilisez un cordon d'alimentation approprié.
N'utilisez que des cordons d'alimentation spécifiques aux instruments approuvés par les autorités
locales.
Mettez l'instrument au sol.
L'instrument est mis à la Terre par un conducteur de mise à la terre de protection du cordon
d'alimentation.Pour éviter un choc électrique, le conducteur de mise à la terre doit être mis à laterre.Assurez - vous que l'instrument est correctement mis à la terre avant de connecter les bornes
d'entrée ou de sortie de l'instrument.
Connectez correctement le fil de signalisation.
Le potentiel de la ligne de signal est égal au potentiel au sol, donc ne connectez pas la ligne de signal
à haute tension.Ne touchez pas les contacts ou les composants exposés.
Voir les cotes de tous les terminaux.
Pour éviter un incendie ou un choc électrique, vérifiez toutes les cotes et signez les instructions del'instrument.Avant de brancher l'instrument, lisez attentivement ce manuel pour obtenir de plus
amples renseignements sur les cotes.
Entretien du matériel.
En cas de défaillance de l'équipement, ne pas démonter et entretenir l'équipement sans autorisation.
L'équipement contient des condensateurs, de l'alimentation électrique, des transformateurs etd'autres dispositifs de stockage d'énergie, ce qui peut causer des blessures à haute tension. Lesdispositifs internes de l'équipement sont sensibles à l'électricité statique. Le contact direct peutfacilement causer des blessures irrécupérables à l'équipement. L'équipement doit être retourné àl'usine ou à l'organisme de maintenance désigné par l'entreprise pour l'entretien. L'alimentation
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SDS800X HD Series User Manualélectrique doit être retirée pendant l'entretienLa ligne ne doit pas être mise sous tension tant que
l'entretien de l'équipement n'est pas terminé et que l'entretien n'est pas confirmé.
Identification de l'état normal de l'équipement.
Après le démarrage de l'équipement, dans des conditions normales, il n'y aura pas d'informationd'alarme et d'erreur au bas de l'interface, et la courbe de l'interface sera balayée librement de gaucheà droite; si un blocage se produit pendant le processus de numérisation, ou si l'information d'alarmeou d'erreur apparaît au bas de l'interface, l'équipement peut être dans un état anormal. Pour voir
l'information d'alarme spécifique, vous pouvez d'abord essayer de redémarrerSi l'information sur ladéfaillance est toujours présente, ne l'utilisez pas pour l'essai. Contactez le fabricant ou le Service deréparation désigné par le fabricant pour effectuer l'entretien afin d'éviter d'apporter des donnéesd'essai erronées ou de mettre en danger la sécurité personnelle en raison de l'utilisation de ladéfaillance.
Ne pas fonctionner en cas de suspicion de défaillance.
Si vous soupçonnez des dommages à l'instrument, demandez à un technicien qualifié de vérifier.
L 'exposition du circuit ou de l' élément d 'exposition du fil est évitée.
Lorsque l 'alimentation est connectée, aucun contact ou élément nu n' est mis en contact.
Ne pas fonctionner dans des conditions humides / humides.
Pas dans un environnement explosif.
Maintenez la surface de l 'instrument propre et sec.
Le Circuit d 'alimentation électrique ne peut pas être mesuré à l' aide du dispositif, ni la tension
qui dépasse la plage de tension décrite dans le présent manuel.
Seuls les ensembles de sondes conformes aux spécifications du fabricant peuvent êtreutilisés.
L'organisme ou l'opérateur responsable doit se référer au cahier des charges pour protéger laprotection offerte par le matériel.La protection offerte par le matériel peut être compromise si
celui - ci est utilisé de manière non spécifiée par le fabricant.
Aucune pièce du matériel et de ses annexes ne peut être remplacée ou remplacée sansl'autorisation de son fabricant.

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Remplacer la batterie dans l 'appareil avec les mêmes spécifications de batterie au lithium.

Termes et symboles de sécurité
Lorsque les symboles ou termes suivants apparaissent sur le panneau avant ou arrière del'instrument ou dans ce manuel, ils indiquent un soin particulier en termes de sécurité.

Ce symbole est utilisé lorsque la prudence est requise. Reportez-vous aux
informations ou documents joints afin de vous protéger contre les blessures ou
les dommages à l'instrument.
Ce symbole avertit d'un risque potentiel de choc électrique.

Ce symbole est utilisé pour désigner la connexion de terre de mesure.

Ce symbole est utilisé pour indiquer une connexion à la terre de sécurité.
Ce symbole indique que l'interrupteur est un interrupteur marche / veille. Lorsqu'il
est enfoncé, l'état de l'oscilloscope bascule entre Fonctionnement et Veille. Cecommutateur ne déconnecte pas l'alimentation de l'appareil. Pour éteindrecomplètement l'oscilloscope, le cordon d'alimentation doit être débranché de laprise secteur une fois l'oscilloscope en état de veille.
Ce symbole est utilisé pour représenter un courant alternatif, ou "AC".
Le symbole " CAUTION" indique un danger potentiel. Il attire l'attention sur une
CAUTIONprocédure, une pratique ou une condition qui peut être dangereuse si elle n'est
pas suivie. Ne continuez pas tant que ses conditions n'ont pas été entièrement
comprises et remplies.
Le symbole " WARNING" indique un danger potentiel. Il attire l'attention sur une
procédure, une pratique ou une condition qui, si elle n'est pas suivie, pourrait

WARNING

entraîner des blessures corporelles ou la mort. Si un AVERTISSEMENT est
indiqué, ne continuez pas tant que les conditions de sécurité ne sont pas
entièrement comprises et remplies.

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Environnement de travail
La conception de l'instrument a été certifiée conforme à la norme EN 61010-1, sur la base des valeurs
limites suivantes:
Environnement
L'instrument doit être utilisé à l'intérieur dans un environnement propre et sec dans la plage detempérature ambiante.
Note: la lumière directe du soleil, les réchauffeurs électriques et d'autres sources de chaleur doiventêtre pris en considération lors de l'évaluation de la température ambiante.

Attention: ne pas utiliser l'instrument dans l'air explosif, poussiéreux ou humide.

Température ambiante
En fonctionnement: 0 ℃ à +50 ℃
Hors fonctionnement: -30 ℃ à +70 ℃
Note: pour évaluer la température de l'environnement, il convient de tenir compte des rayonnements
solaires directs, des radiateurs thermiques et d'autres sources de chaleur.
Humidité
Fonctionnement: 5% ~ 90% HR, 30 °C, 50 °C réduit à 50% HRHors fonctionnement: 5% ~ 95%,
65 ℃, 24 heures
Altitude
Fonctionnement: ≤ 3000 m
À l'arrêt: ≤ 15,000 m
Catégorie d 'installation (surtension)
Ce produit est alimenté par une alimentation électrique conforme à l 'installation (surtension)
Catégorie II.
Installation (overvoltage) Category Definitions Définition de catégorie d 'installation(surtension)
La catégorie II d'installation (surtension) est un niveau de signal applicable aux terminaux de mesured' équipement reliés au circuit source.Dans ces bornes, des mesures préventives sont prises pourlimiter la tension transitoire à un niveau inférieur correspondant.
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La catégorie II d'installation (surtension) désigne le niveau local de distribution d 'énergie d' unéquipement conçu pour accéder à un circuit alternatif (alimentation alternative).
Degré de pollution
Un oscilloscope peut être utilisé dans un environnement Pollution Degree II.
Note: Pollution Degree II signifie que le milieu de travail est sec et qu'il y a une pollution non
conductrice.Parfois, la condensation produit une conductivité temporaire.
IP Rating
IP20 (as defined in IEC 60529).

Exigences de refroidissement
Cet instrument repose sur un refroidissement à air forcé avec des ventilateurs internes et desouvertures de ventilation. Des précautions doivent être prises pour éviter de restreindre le flux d'air
autour des ouvertures (trous de ventilateur) de chaque côté de la lunette. Pour assurer une ventilation
adéquate, il est nécessaire de laisser un espace minimum de 15 cm (6 pouces) sur les côtés del'instrument.

ATTENTION: Ne bloquez pas les trous de ventilation situés des deux côtés de lalunette.

ATTENTION: Ne laissez aucun corps étranger pénétrer dans la lunette par les trousde ventilation, etc.

Connexions d'alimentation et de terre
L'instrument fonctionne avec une alimentation CA monophasée de 100 à 240 Vrms (+/- 10%) à 50/60
Hz (+/- 5%).
Aucune sélection manuelle de la tension n'est requise car l'instrument s'adapte automatiquement àla tension de ligne.
Selon le type et le nombre d'options et d'accessoires (sondes, plug-in de port PC, etc.), l'instrument
peut consommer jusqu'à 80 W d'énergie.

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Remarque: l'instrument s'adapte automatiquement à l'entrée de ligne CA dans les plages suivantes:
Plage de tension:

90 - 264 Vrms

Gamme de fréquences:

47 - 63 Hz

L'instrument comprend un jeu de cordons mis à la terre contenant une fiche polarisée à trois bornes
moulée et un connecteur standard IEC320 (Type C13) pour établir la tension de ligne et la connexion
de mise à la terre de sécurité. La borne de mise à la terre de l'entrée CA est directement connectéeau châssis de l'instrument. Pour une protection adéquate contre les risques d'électrocution, la fiche
du cordon d'alimentation doit être insérée dans une prise secteur correspondante contenant uncontact de sécurité avec la terre. Utilisez uniquement le cordon d'alimentation spécifié pour cet
instrument et certifié pour le pays d'utilisation.
Avertissement: risque de choc électrique!
Toute interruption du conducteur de terre de protection à l'intérieur ou à l'extérieurde la portée ou la déconnexion de la borne de terre de sécurité crée une situation
dangereuse.
L'interruption intentionnelle est interdite.
La position de l'oscilloscope doit permettre un accès facile à la prise. Pour éteindre complètement
l'oscilloscope, débranchez le cordon d'alimentation de l'instrument de la prise secteur.
Le cordon d'alimentation doit être débranché de la prise secteur si la lunette ne doit pas être utilisée
pendant une période prolongée.
ATTENTION: les enveloppes extérieures des bornes du panneau avant (CH1, CH2,
CH3, CH4) sont connectées au châssis de l'instrument et donc à laterre de sécurité.

Nettoyage
Nettoyez uniquement l'extérieur de l'instrument à l'aide d'un chiffon doux et humide. N'utilisez pas deproduits chimiques ou d'éléments abrasifs. Ne laissez en aucun cas l'humidité pénétrer dansl'instrument. Pour éviter les chocs électriques, débranchez le cordon d'alimentation de la prise secteur
avant de le nettoyer.
Avertissement: risque de choc électrique!
Aucune pièce réparable par l'opérateur à l'intérieur. Ne retirez pas les capots.
Confiez l'entretien à un personnel qualifié

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Conditions anormales
Utilisez l'instrument uniquement aux fins spécifiées par le fabricant.
N'utilisez pas la lunette s'il y a des signes visibles de dommages ou si elle a été soumise à de fortes
contraintes de transport.
Si vous pensez que la protection de l'oscilloscope a été altérée, débranchez le cordon d'alimentationet sécurisez l'instrument contre toute opération involontaire.
Une bonne utilisation de l'instrument nécessite la lecture et la compréhension de toutes les
instructions et étiquettes.

Avertissement: Toute utilisation de l'oscilloscope d'une manière non spécifiée parle fabricant peut compromettre la protection de sécurité del'instrument. Cet instrument ne doit pas être directement connectéà des sujets humains ni utilisé pour la surveillance des patients.

Conformité en matière de sécurité
La présente section présente les normes de sécurité applicables aux produits.
U.S. nationally recognized testing laboratory listing◼

UL 61010-1:2012/R:2018-11. Prescriptions en matière de sécurité pour les appareils électriques
utilisés en laboratoire et de mesure - partie 1: prescriptions générales.

◼

UL 61010-2-030:2018. Prescriptions de sécurité pour les appareils électriques de mesure, decontrôle et de laboratoire - partie 2 - 030: prescriptions spéciales pour les circuits d 'essai et demesure.

Canadian certification◼

CAN/CSA-C22.2 No. 61010-1:2012/A1:2018-11. Prescriptions en matière de sécurité pour lesappareils électriques utilisés en laboratoire et de mesure - partie 1: prescriptions générales.

◼

CAN/CSA-C22.2 No. 61010-2-030:2018. Prescriptions de sécurité pour les appareils électriquesde mesure, de contrôle et de laboratoire - partie 2 - 030: prescriptions spéciales pour les circuits
d 'essai et de mesure.

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SDS800X HD Series User Manual3First Steps
Delivery Checklist

3.1

First, verify that all items listed on the packing list have been delivered. If you note any omissions or
damage, please contact your nearest SIGLENT customer service center or distributor as soon as
possible. If you fail to contact us immediately in case of omission or damage, we will not be
responsible for replacement.

Quality Assurance

3.2

The oscilloscope has a 3-year warranty (1-year warranty for probes and accessories) from the dateof shipment, during normal use and operation. SIGLENT can repair or replace any product that isreturned to the authorized service center during the warranty period. We must first examine theproduct to make sure that the defect is caused by the process or material, not by abuse, negligence,
accident, abnormal conditions, or operation.
SIGLENT shall not be responsible for any defect, damage, or failure caused by any of the following:a)

Attempted repairs or installations by personnel other than SIGLENT.

b)

Connection to incompatible devices/incorrect connection.

c)

For any damage or malfunction caused by the use of non-SIGLENT supplies. Furthermore,
SIGLENT shall not be obligated to service a product that has been modified. Spare,replacement parts, and repairs have a 90-day warranty.

The oscilloscope's firmware has been thoroughly tested and is presumed to be functional.
Nevertheless, it is supplied without a warranty of any kind covering detailed performance. Products
not made by SIGLENT are covered solely by the warranty of the original equipment manufacturer.

3.3

Maintenance Agreement

We provide various services based on maintenance agreements. We offer extended warranties aswell as installation, training, enhancement and on-site maintenance, and other services throughspecialized supplementary support agreements. For details, please consult your local SIGLENT
customer service center or distributor.

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4

Document Conventions

For convenience, text surrounded by a box border is used to represent the button of the front panel.
For example,

Default

represents the "Default" button on the front panel. Text with shading is used

to represent the touchable or clickable menu/button/region on the touch screen. For example, Display
represents the "Display" menu on the screen:

For the operations that contain multiple steps, the description is in the form of "Step 1 > Step 2 >...".
As an example, follow each step in the sequence to enter the upgrade interface:
Utility > Menu > Maintenance > Upgrade
Click theUtility>Menu

in the menu bar as step 1, click the

Maintenanceoption on thescreen as step 2, and click the Update option on the screen as step 3 to enter the upgrade interface.

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5
5.1

Getting Started
Mechanical Dimensions

Front View

Top View

5.2

Adjust the Supporting Legs

Adjust the supporting legs properly to use them as stands to tilt the oscilloscope upwards for stable
placement as well as easier operation and observation of the instrument.

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5.3

Power on

SDS800X HD provides two ways for power on, which are:
Auto Power-on
When the “Auto Power-on” option is enabled, once the oscilloscope is connected to the AC power
supply through the power cord, the oscilloscope boots automatically. This is useful in automated or
remote applications where physical access to the instrument is difficult or impossible.
Steps for enabling the “Auto Power-on” function:
Utility > Menu > System Settings > Auto Power On
Power on by Manual
When the " Auto Power-on” option is disabled, the power button on the front panel is the only control
for the power state of the oscilloscope.

5.4

Shut down

Press the power button to turn off the oscilloscope. Or follow the steps below:
Utility > Shutdown
Note: The Power button does not disconnect the oscilloscope from the AC power supply. The only
way to fully power down the instrument is to unplug the AC power cord from the outlet. The poweri n t si gl en t. co m

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cord should be unplugged from the AC outlet if the scope is not to be used for an extended period.

5.5

System Information

Follow the steps below to examine the software and hardware versions of the oscilloscope.
Utility > Menu > System Info
See the section “System Information” for details.

5.6

Install Options

A license is necessary to unlock a software option. See the section "Install Option" for details.

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6
6.1

A.

Quick Start
Front Panel Overview

Touch Screen Display: The display and major functions area. See the "Touch Screen Display"chapter for more details

B.

Front Panel: Includes knobs and buttons. See the "Front Panel" chapter for more details

C.

Analog Input Connectors

D.

Probe Compensation/ Ground Terminal: Supplies a 0-3 V, 1 kHz square wave forcompensating the probes

E.

SBUS Digital Input

F.

USB 2.0 Host Port: Connect the USB host ports to USB storage devices for data transfer or a
USB mouse/keyboard for control

G.

Power Switch

H.

Supporting Legs: Adjust the supporting legs properly to use them as stands to tilt theoscilloscope for stable positioning of the oscilloscope WARNING: Non-standard HDMI interface, Siglent device ONLY, or you will damage your device.

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6.2

Rear Panel Overview

A.

10M / 100M LAN Port: Connect the port to the network for remote control

B.

USB 2.0 Device Port: Connect with a PC for remote control

C.

USB 2.0 Host Port: Connect with a USB storage device or USB mouse/keyboard

D.

Auxiliary Out: Outputs the trigger indicator. When Mask Test is enabled, outputs the pass / failsignalE.

AC Power Input

F.

KeyholeG.

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6.3

Connecting to External Devices/Systems

6.3.1

Power Supply

The standard power supply for the instrument is 100~240 V, 50/60 Hz. Please use the power cord
provided with the instrument to connect it to AC power.

6.3.2

LAN

Connect the LAN port to the network with a network cable with an RJ45 connector for remote control.
See chapter “Remote Control” for detailed information on controlling the instrument with a computer.
Follow the steps below to set LAN connection:
Utility > Menu > I/O > LAN Config
See section “LAN Setting” for details of the configuration.

6.3.3

USB Peripherals

Connect a USB storage device (FAT32 format recommended) to one of the USB host ports for datatransfer, or connect a USB mouse/keyboard to one of the USB host ports for controlling the instrument.
See chapter “Save/Recall” for details of data transfer.

6.3.4

Auxiliary Output

When Mast Test is enabled, the port outputs the pass/fail signal, otherwise, it outputs the trigger
indicator. The trigger indicator can be used to measure the waveform capture rate.
See the chapter “Mask Test” for more details on the pass/fail output.

6.3.5

Waveform Generator

Activate the SDS800XHD-FG option and connect the SAG1021I USB function / arbitrary waveformgenerator module to any USB host port on the oscilloscope. The oscilloscope then can control theUSB module to output specified waveforms.
Touch the screen Utility > Wave Gen to set the waveform.

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SDS800X HD Series User ManualSee chapters “Arbitrary Waveform Generator” and “Bode Plot” for more relative information.

6.3.6

ProbesThe SDS800X HD series oscilloscope supports active probes and passive probes. The specifications
and probe documents can be obtained at int.siglent.com, www.siglentna.com, or www.siglenteu.com.
Probe Compensation
When a passive probe is used for the first time, you should compensate it to match the input channelof the oscilloscope. Non-compensated or poorly compensated probes may increase measurement
inaccuracy or error. The probe compensation procedures are as follows:1.

Connect the coaxial cable interface (BNC connector) of the passive probe to any channel of theoscilloscope.

2.

Connect the probe to the “Compensation Signal Output Terminal” (Cal) on the front of theoscilloscope. Connect the ground alligator clip of the probe to the “Ground Terminal” under thecompensation signal output terminal.

3.

Press theAuto Setup

4.

Check the waveform displayed and compare it with the following.

Under
Compensated5.

button.

Perfectly
CompensatedOver
Compensated

Use a non-metallic driver to adjust the low-frequency compensation adjustment hole on the probe
until the waveform displayed is as the “Perfectly compensated” in the figure above.

It’s not necessary to compensate active probes like the SIGLENT SAP series.

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6.3.7

Logic Probe

To connect the logic probe: The SLA1016 probe consists of five parts: the SLA1016 probe, theSUBS interface cable, the flat wire, the flying wire, and the probe clip. The installation is carried out
as follows:1.

Connect one end of the SUBS interface cable to the logical port of the SDS800X HD and theother end to the interface of the SLA1016 probe;

2.

The interface on the SLA1016 probe is fixed and the flat cables are connected in thecorresponding direction;

3.

The flat wire and the flying wire are connected according to the corresponding interface;

4.

Finally, connect the short flying wire to the GND of the circuit under test, and connect the long
flying wire to the circuit under test through the probe clip.

To remove the logic probe: After using, if you want to unplug the device, you need to touch theRemove Device

through the digital menu interface. When the oscilloscope interface pops up“Digital Device Disconnected”, you can remove the SLA1016 probe.
Note:
There are two indicator lights on the side of the SLA1016, one red light (Power) and one green light(Ready)

Red light: SLA1016 is permanently on when the power supply is normal, and flashing or not on
indicates abnormal power supply.

Green light: When SLA1016 is connected to the oscilloscope, the green light is turned on andextinguished, entering a slow flashing (1 second cycle) state, and finally remaining on for a longtime. When there is data transmission, the green light flashes quickly (0.5 second cycle).

See chapter “Digital Channels” for more information.

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7
7.1

Touch Screen Display
Overview

The entire SDS800X HD display is a capacitive touch screen. Use your fingers to touch, drag, pinch,
spread, or draw a selection box. Many controls that display information also work as “buttons” toaccess other functions. If you are using a mouse, you can click anywhere that you can touch toactivate a control. You can alternate between clicking and touching the control, whichever is mostconvenient.

A.

Menu Bar

B.

Grid Area

C.

Channel Descriptor Boxes

D.

Timebase and Trigger Descriptor Boxes

E.

Dialog Box

F.

Trigger Delay Indicator

G.

Trigger Level Indicator

H.

Cursors

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Trigger Level Line (Vertical) and Trigger Delay Indicator (Horizontal) show the trigger position of
the waveform.
Cursors show where measurement points have been set. Move the cursors to quickly reposition themeasurement point.
Channel Descriptor boxes include analog channels (Cx), digital channels (D), Zoom (Zx), math (Fx),and reference (Ref). They are located under the grid area, showing the parameters of thecorresponding traces. Touching the boxes creates a dialog box.
Timebase and Trigger Descriptor boxes show the parameters of the timebase and trigger
respectively. Touching the boxes creates a dialog box for the selected item.
The backlight of the display is adjustable. Follow the steps below to adjust the backlight:
Display > Menu >7.2

LCD Brightness

Menu Bar

Menu bar with drop-down menus lets you access set-up dialogs and other functions. All functionality
can be accessed through the menu bar. It is not necessary for common operations. You can enter
most menus by using the front panel or parameter description labels instead of the menu bar. However,the following operations can only be accessed through the menu bar:Utility > Help
Utility > Save/Recall
Utility > Reboot
Display

7.3

Grid Area

The grid area displays the waveform traces. Traces can be moved by dragging and re-scaled by pinch
and spread. The area is divided into 8 (vertical) * 10 (horizontal) grids. The best display effect can beobtained by adjusting the waveform intensity and graticule. Follow the steps below to set theseparameters:
Display > Menu > Intensity ,Display > Menu > Graticule
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There are multiple indicators on the grid:

Trigger Level Indicator shows the level where thewaveform triggers on the vertical axis.

Trigger Delay Indicator locates where thewaveform triggers on the horizontal axis... Whenthe trigger position is outside the screen, thedirection of the triangle points outside the screen as
well.

Channel Offset Indicator with a channel number
shows the offset position of the corresponding
channel.

The user can choose to show the axis labels or not by:
Display > Menu > Axis label Setting

Axis label = on

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Axis label = off

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7.4

Channel Descriptor Box

Channel Descriptor boxes include analog channels (Cx), digital channels (D), zoom (Zx), math (Fx),and reference (Ref). They are located under the grid area, showing the parameters of thecorresponding traces. Touching the boxes creates a dialog box. See chapter “Vertical Setup” for moredetails. Below is an example for analog channel 1:A.

Channel Index

B.

Coupling and Input ImpedanceC.

Vertical Scale

D.

Vertical Offset

E.

Bandwidth Information

F.

Probe Attenuation Factor

Bandwidth Information:
The bandwidth information is indicated by the following icons:: 20 MHz bandwidth limit: Full bandwidth
Invert Indicator: shows that the current channel is inverted:: Invert has been turned on
None: Invert has been turned off
Coupling and Input Impedance:: DC coupling, 1 MΩ impedance: AC coupling, 1 MΩ impedance: Ground

Vertical Scale: The scale of each grid in the vertical direction. For example, when the vertical scaleis 1.00 V/div, the full scale of the oscilloscope is 1.00 V/div * 8 div=8 V.
Vertical Offset: The offset of the channel in the vertical direction. When the vertical offset is 0, thechannel offset indicator is located in the middle of the vertical axis.
Probe Attenuation Factor: Set the probe attenuation factor to match the actual attenuation of theprobe. The oscilloscope automatically calculates the vertical scale according to the probe attenuationi n t si gl en t. co m

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SDS800X HD Series User Manualfactor. For example, the vertical scale of the oscilloscope is 100mV/div with 1X attenuation, and 1V/div
if the attenuation factor is changed to 10X. When inserting a standard 10X passive probe with a probe
sense terminal, the oscilloscope will automatically set the factor to 10X.
: 1:1 attenuation, suitable for direct coaxial cable connection or passive probes with 1X
attenuation: 10:1 attenuation, suitable for general passive probes or active probes with 10X attenuation: 100:1 attenuation, suitable for some high-voltage probes: Custom attenuation factor

7.5

Timebase and Trigger Descriptor Boxes

The Timebase Descriptor box shows the parameters of the timebase. See chapter “Horizontal and
Acquisition Setup” for more information.

A.

Trigger delay

B.

Horizontal scale (timebase)C.

# Samples

D.

Sample rate

Trigger delay: The time offset of trigger position. When trigger delay is 0, the trigger delay indicator
is in the center of the horizontal axis of the grid area.
Horizontal scale: Timebase, the time of each grid in the horizontal direction. For example, if the scale
is 500us/div, the time of each grid is 500 us, and the full-screen time range of the oscilloscope is 500
us/div * 10 div = 5 ms.
# Samples: The number of sample points on the current screen.
Sample rate: The current sample rate.
The Trigger Descriptor box shows the parameters of the trigger setting. See chapter “Trigger” fordetailed information.

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SDS800X HD Series User ManualA.

Trigger source

B.

Trigger couplingC.

Trigger modeD.

Trigger level

E.

Trigger typeF.

Trigger slope

Trigger source

C1~C4:Analog channels

AC Line: AC mains supply



D0~D15: Digital channels

Trigger coupling: See the chapter "Trigger CouplingTrigger" for details.
Trigger mode

Auto: The oscilloscope will sweep without a set trigger. An internal timer triggers the sweep after
a preset timeout period so that the display refreshes continuously. This is helpful when first
analyzing unknown signals. Otherwise, Auto functions the same as Normal when a trigger
condition is found.



Normal: Sweeps only if the input signal meets the trigger condition. Otherwise, it continues todisplay the last acquired waveform.

Single: Stops the acquisition and displays the last acquired waveform.

Trigger level: The source voltage level or levels that mark the threshold for the trigger to fire. Trigger
levels specified in Volts normally remain unchanged when the vertical gain or offset is modified.
Trigger type: See the chapter "Trigger" for details.

7.6

Dialog Box

The dialog box on the right side of the screen is the main area for setting the parameters of theselected function.

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A.

Title bar. Touching the bar can hide the dialog
box, and touching again can open the dialog box.

B.

Parameter setting area.

C.

Scroll bar. When parameters are more than thedisplayed range, the blue scrollbar will be
displayed. By sliding the dialog area up anddown, or rolling the mouse wheel, it can scroll tothe area not displayed.

To Set Parameters
The SDS800X HD provides a couple of different ways to input/select parameters:

Switch: Sets parameters with two states, such as to enable or disable afunction. Touch the switch region to change from one state to the other.

List: Sets parameters with more than two
options, such as coupling mode of channels.
Touch the parameter region, and then selectthe expected option from the pop-up list.

Virtual Keypad: Sets parameters with a numerical value. Touch theparameter region, and the parameter can be adjusted by the universal
knob on the front panel or by the mouse wheel; touch the region again,
then the virtual keypad appears:

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Let’s use the operation of setting the “deskew” of a channel as an example: If the expected value is
65 ns, input “65” on the virtual keypad, and then choose the units n to complete the operation.
On the virtual keypad, touching the button

Max

,

Min

, and

Default

quickly sets theparameter to the maximum, minimum, and default values.

Hide the Dialog Box
When the menu style is set to Embedded, the grid area will be compressed horizontally to display thecomplete waveform when the dialog box is displayed. After setting the parameters, to achieve thebest waveform display effect, touch the title bar in the upper right corner to hide the dialog box. Touchit again to recall the dialog box.
When the menu style is set to Floating, it will directly cover part of the grid area when displayed. If
you want to observe the covered area, touch the title bar in the upper right corner to hide the dialog
box. Touch it again to recall the dialog box.
The dialog box can be set to be hidden automatically. When the instrument is not operated beyond
the set time, the dialog box will be automatically hidden. Follow the steps below:
Display > Menu > Hide Menu .

Menu style = Floating, and Dialog box is

Dialog box is hidden

displayed

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Menu style = Embedded, and Dialog box isdisplayed

7.7

Touch Gestures

Waveforms, cursors, and trigger levels can be adjusted.

Drag the waveform left and right to move it

Pinch and spread the waveform horizontallyon the horizontal axis

to re-scale the timebase

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Drag the waveform up and down to move it

Pinch and spread the waveform vertically toon the vertical axis

re-scale the vertical gain

Touch and drag the cursor to move it

Touch and drag the cursor information region
to move the pair of cursors simultaneously

7.8

Mouse and Keyboard Operation

The SDS800X HD user interface features mouse control as well as a touch screen. If the oscilloscopeis connected to a USB mouse, you can click on the object with the mouse instead of touching theobject. Similarly, if a USB keyboard is connected, you can use the keyboard to input charactersinstead of using the virtual keyboard.

7.9

Choosing the Language

Follow Utility > Menu > System Settings > Language to choose the language.
See the section “Language” for details.

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8

Front Panel

8.1

Overview

The front panel is designed to operate the basic functions without having to open the softwaremenu. Most of the front panel controls duplicate functionality available through the touch screen
display but the operation is more quickly achieved.

All the knobs on the front panel are multi-function. They can be pushed
as well as rotated. Pushing a knob quickly recalls a specific function,
which is indicated by the silkscreen near the knob.

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8.2

A.

Vertical Control

When a channel is disabled, push its channel button to turn it on. When a channel is turned on
but not activated, push the button to activate it. When the channel is turned on and activated,push the button to disable it.

B.

Press the button to turn on the digital channel and open the DIGITAL dialog box. Press again
to turn off the digital channels.

C.

Press the button to turn on the math function and open the MATH dialog box. Press again toturn off the math function.

D.

Press the button to turn on the reference function and open the REFERENCE dialog box.
Press again to turn off the reference function.

E.

Analog channels (C1-C4), digital channels (D), Zoom (Z), math (F1-F4), and references (Ref)share the same vertical knob. Rotate the knob to adjust the vertical scale (volt/div) of theactivated trace. Push to alternate between coarse and fine adjustments. When the digital channel
is active, rotate the knob to change the selected digital channel.

F.

Analog channels (C1-C4), digital channels (D), Zoom (Z), math (F1-F4), and references (Ref)share the same offset knob. Rotate the knob to adjust the DC offset or vertical position of theactivated trace. Push to set the offset to zero. When the digital channel is active, rotate the knob
to change the position of the selected digital channel.

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8.3

Horizontal Control
A.

Rotate to adjust the horizontal scale (time/div); push to enable
Zoom; push again to switch between the main window and zoom
window.

B.

Push to enable horizontal Roll; push again to exit Roll mode. At
time-base settings larger than 50 ms/div, it is recommended to
set the oscilloscope to Roll mode so that the waveform isdisplayed in real-time.

8.4

C.

Push to enable Zoom. Push again to exit Zoom mode.

D.

Rotate to adjust trigger delay; push to set trigger delay to zero.

Trigger Control
A.

Opens the trigger setup dialog box

B.

Auto mode: Triggers after a preset period if no valid trigger
occursC.

Normal mode: Triggers repeatedly when all conditions are met

D.

Single mode: Triggers once when all conditions are met

E.

Trigger level adjustment: Push to set the level to 50% of the
waveform

8.5

Run/Stop

ButtonPress the button to switch the acquisition state between Run and Stop. When thestate is Run, the button is illuminated in green. When the state is Stop, the button
is illuminated in red.

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8.6

Auto Setup

ButtonAuto Setup forces the oscilloscope to automatically set the vertical scale,horizontal scale, and trigger level according to the input signal to get optimum
waveform display. An Auto Setup operation can also be performed by following
the steps Acquire > Auto Setup .

8.7

Cursors Control
Push the button to open the cursors setup dialog box.

Rotate the knob to move the selected cursor; push to select a different cursor.

8.8

Universal Knob
When the parameter setting area is highlighted, the Universal Knob can be used
to adjust the parameter. Press the knob to select an option from the list. The
default function of the Universal Knob is to adjust the intensity of the waveform
traces.

8.9

Other Buttons
Enables / Disables measurements and recalls the MEASURE dialog box.

Press the button to recall the ACQUIRE dialog box.

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Performs a quick screenshot save or saves the currently save type file to the storage
path. See the section “Save Button” for details.
Clears the data or displays in multiple sweeps, including display persistence,measurement statistics, average sweeps, and Pass/Fail statistics.
Press the button to recall the DISPLAY dialog box. The second press turns on
Persist and lights the button. Press the button again to turn off Persist.
The preset functions can be called quickly through this button. See the section "Quick
Action" for details.
Press the button to turn on bus operation and recall the DECODE dialog box.
Press the button again to turn off bus operation.
Press the button to recall the NAVIGATE dialog box.

Press this button to play backward the waveform.

Press this button to stop the waveform.

Press this button to play forward the waveform.

Enables/Disables the touch screen. The LED on the button lights to indicate that thetouch screen is working.
Resets the oscilloscope to the default configuration.

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9

Multiple Approaches to Recall Functions

The oscilloscope can recall functions through different approaches.

9.1

Menu BarIf you are familiar with common computer programs, you may first choose to access a function by thedrop-down menu from the menu bar at the top of the display.
For example, to open the trigger setup dialog box, you can follow the steps below:

Trigger > Menu
The operations can be completed either by touch or bymouse clicks.

9.2

Descriptor Box

For the setup of channels, timebase, and trigger, there are dialog boxes at the bottom of the display.
For the introduction of the descriptor box, see sections “Channel Descriptor Box” and “Timebase andTrigger Descriptor Box”.

For the example above, touch the trigger descriptor box and thetrigger setup dialog box will be activated.

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9.3

Shortcut Button on the Front panel

Most of the functions of the oscilloscope can be recalled directly by the shortcut buttons on the front
panel. See the chapter "Front Panel" for details.

To open the trigger setup dialog box, press the

Setup

button in the trigger

control area on the front panel.

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10 Quickly Capture the Signal
This is an example of how to acquire a signal quickly. In this example, we assume the signal isconnected to channel 1 and channel 1 is turned off.

First, press the channel 1 button to turn on channel 1. The LED on the button
lights and the descriptor box of channel 1 is displayed at the bottom of the screen.

Second, press theAuto Setup

button. The oscilloscope will automaticallyadjust the vertical scale, horizontal scale, and trigger level according to the input
signal to get an optimum waveform display.

Auto Setup will not work on all signal types, especially time-varying bursts or slow signals (< 100 Hz).
If Auto Setup cannot achieve desired settings, manually adjustment of the vertical, horizontal, andtrigger systems is preferred. See the chapters "Vertical Setup", "Horizontal and Acquisition Setup"and "Trigger" for details.

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11 Vertical Setup
11.1

Turn on/off a Channel

From the Front Panel
When a channel is disabled, push its channel button to turn it on. When a channel is turned on but
not activated, push the button to activate it. When the channel is turned on and activated, push the
button to disable it.
From the Touch Screen
Touch the + button and then select the expected channel to turn it on, and its channel descriptor
box and a dialog box will appear on the display. Touch the channel descriptor box and then touch the
Off button to disable it.

Turn on C1

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11.2

Channel Setup

Touch the channel descriptor box, a quick dialog will pop up. Vertical scale and offset can also be set
from this dialog box.

A.

Touch the region to set the vertical scale with theuniversal knob or virtual keypadB.

▲ to increase the vertical scale and ▼ to decrease

C.

Check to coarsely adjust the vertical scale and uncheckto enable fine adjustment

D.

Touch the region to set the offset with the universal knob
or virtual keypadE.

▲ to increase the offset and ▼ to decreaseF.

Set the offset to zeroG.

Copy the setting of the current channel to another channel

H.

Quickly apply the current channel as the source of a
specified operation (Trigger, FFT, Simple Measure,
Cursor, Search and Counter)

I.

Disable the channel

J.

Hide the trace

The vertical scale can be adjusted in coarse or fine mode. Fine mode can reach the full-scale display
as close as possible, which gets the best measurement accuracy in the vertical direction. The
oscilloscope automatically switches to fine mode when the vertical scale is controlled by touchgestures.
Activating a channel recalls the channel dialog box, displaying more parameters:

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SDS800X HD Series User ManualA.

Turn channel on/off

B.

Coupling (DC, AC or GND)C.

Bandwidth limit (Full or 20 MHz)D.

Probe settings including attenuation (1X, 10X, 100X or
custom) and probe checkE.

Set the label text. Click to recall the label setting. Users cancustomize the text and display of the label

F.

Quickly apply a specified operation (Trigger, FFT, Simple
Measure, Cursor, Search, Mask Test, Counter and Wave
Gen) to the current channelG.

Units for the channel

H.

Deskew

I.

Enable/disable invert

J.

Trace visible/hidden

Coupling

DC: All of the input signal frequency components are passed to the display.



AC: The signal is capacitively coupled. DC signal components are rejected. See the datasheet
for details of the cut-off frequency.AC coupling is suitable for observing AC signals with DC offset,
such as power ripple.



GND: The channel is grounded by an internal switch. GND coupling is used to observe the zero
offset error of the analog channels or determine the source of noise in the waveform (from signal
or from oscilloscope itself).

Bandwidth Limit
Full bandwidth passes through signals with high-frequency components, but it also means that noisewith high-frequency components can pass through. When the frequency component of the signal isvery low, better signal-to-noise ratios (SNR) can be obtained by turning on a bandwidth limit. The
SDS800X HD provides two hardware bandwidth limit options: Full or 20 MHz.

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Probe Settings
The SDS800X HD provides 1X, 10X, 100X and custom probe attenuation factor options. The custom
values can be between 10-6~106. The oscilloscope will automatically convert the vertical scaleaccording to the current probe attenuation factor. For example, the vertical scale of the oscilloscope
under 1X attenuation is 100 mV/div, and the vertical scale will be automatically set to 1 V/div if theprobe attenuation is changed to 10X. If a standard probe with a readout terminal is connected, theoscilloscope will automatically set the probe attenuation to match the probe.
The Probe Check option is provided to quickly check if the probe is correctly compensated. Connect
the probe as in section “Probes” and touch Probe > Probe Check , then operate according to
the prompt.
Label
Users can set the label text for channels. Open the label setting dialog box to select the source,
customize the label text, and set the display. The source can be C1~C4, Math, and RefA~RefD. The
length of the label is limited to 20 characters. The characters beyond this length will not be displayed.
When the “Display” option is set to “on”, the label will be displayed on the right side of the channel
offset indicator.

The labels are hidden

The labels are displayed

Apply toWith this setting, some common functions such as Trigger, FFT, Simple Measure, Cursor, Search,
Mask Test, Counter and Wave Gen can be quickly applied to the selected channel. Once a functionis specified, it will switch directly to the function menu and automatically set that channel as the source.
Unit
Voltage unit "V" or current unit "A”. When using the current probe, the unit should be set to "A".
Deskew
Due to the skew between channels, cables, or probes, the delay of signals passing through different
measurement paths may be inconsistent. For example, two coaxial cables with a 1-inch difference inlength could introduce a skew of more than 100 ps. In some scenarios (e.g. measuring the setup/holdi n t si gl en t. co m

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time between clock and data), it may be necessary to compensate for the skew between channels.
The method of compensation: Probe the same signal simultaneously using two channels (including
the cables or probes that you intend to use for measurements) and adjust the deskew parameter of
one channel until the waveforms of the two channels observed on the screen coincide horizontally.

Before deskew

After deskew

Note: When the channel with deskew compensation is the trigger source, the trigger delay indicatordoes not change as the deskew value changes.
InvertWhen invert is enabled, the waveform is rotated 180 degrees around earth potential (0 Volts).

Before invert

After invert

Trace
When the trace is hidden, the channel waveform is no longer displayed on the screen, while theacquisition is still running in the background.

Trace visible
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12 Digital Channels
12.1

Overview

SLA1016 Probe
The SLA1016 is a logic probe designed to monitor up to 16 digital signals at once. The 16 digitalchannels are separated into two groups and each group has its threshold, making it possible tosimultaneously view data from different logic families.

Note: To avoid personal injury or damage to the logic probe and any associatedequipment, the following safety precautions should be noted.

The equipment shall be used only for the purposes specified by the manufacturer. The
SLA1016 probe is used only for SIGLENT's special series of oscilloscopes. Protection mechanisms
can be compromised if the way the devices connected by the SLA1016 are not used for their intended
purpose.
Connect and disconnect correctly. Excessive bending can damage the cable.
Do not use equipment in humid or explosive environments.
Only used indoors. The SLA1016 is designed to be used indoors and should only be operated in aclean, dry environment.
Do not use the equipment when you suspect a problem. Do not use the SLA1016 if any parts aredamaged. Maintenance work shall be performed by maintenance personnel with appropriatequalifications.
Keep product surface clean and dry.
SDS800XHD-16LA Option
The software option adds the following functions to the oscilloscope:

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digital logic probe, including waveform display, save, parameter measurement, etc.


Trigger on a digital channel - Trigger with the digital channel as the trigger source, isolating
events of interest.



Decode on a digital channel - Serial protocol decoding of a digital channel requires theinstallation of the serial decode option.

12.2

Enable/Disable the Digital Channels

Turning on or off the digital channels is similar to analog channels. Digital data can be stored as
waveform files. Horizontal cursors and most horizontal measurements also apply to digital waveforms.

A.

Digital channel waveform display, which shares the same grid area with the analog channels.

B.

Digital channel descriptor box.

C.

Dialog box.

D.

Digital channel indicators. Up to 16 digital channels are organized in two groups with different
thresholds: D15~D8 and D7~D0. Every channel can be turned on or off individually.

E.

Labels can be set to data, address or custom characters.

F.

Digital bus

From the Front Panel
Press theDigitalbutton on the front panel to turn on digital channels and display the waveforms.

Press again to turn it off.

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From the Touch Screen
Click + at the bottom of the display and select the “Digital” to turn it on. Click the digital channel
descriptor box, and select Off on the pop-up menu to turn it off. Refer to the operation in thechapter “Vertical Setup” for details.

12.3

Digital Channel Setup

Touch the digital descriptor box, then the quick menu of digital channel settings pops up above thedescriptor box. In the menu height and position of digital channels can be set:A.

Upper position limit of the digital channel display area.
Use the universal knob or virtual keypad to set it.
Decrease the height to provide more adjustment area.

B.

▲ to increase position and ▼ to decrease the channel
location.

C.

Reset the position to the default value.

D.

The range in height of the digital channels display
area. Use the universal knob or virtual keypad to set
it. If the display height covers all of the available
divisions, there will not be room to adjust the position.

E.

▲ to increase and ▼ to decrease the number ofdivisions occupied by the digital channels.

Height=8div, Position=0div

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F.

Reset the height to the default value.

G.

Turn off the digital channels.

H.

Open the digital dialog box on the right side.

Height=4div, Position=1div

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The quick menu only covers the height range and position of the digital channels display area. Moresettings can be found in the dialog box.

A.

Turn on/off the digital channels.

B.

Labels can be set to data, address, or custom characters.

C. Logic threshold of D7~D0. The oscilloscope will automatically
set the threshold according to the specified logic family, or theuser can set the threshold manually using the Custom option.
D. Logic threshold of D15~D8.
E.

Set the channels to be displayed.

F.

Deskew setting, the same as setting analog channels.

G. Bus setting.
H. System information and firmware upgrade.
I.

Remove SLA1016 probe.

Logic Threshold Setting
The threshold level determines how the input signal is evaluated. The threshold level can be set in
the Logic Setting . The input voltage less than the threshold is recognized as a '0', and the input
voltage greater than the threshold is recognized as a ‘1’.

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The configurable logical level includes TTL, CMOS, LVCMOS 3.3 V,
LVCMOS 2.5 V, and Custom.
The setting range of the custom threshold is -8.0 V to +8.0 V.

Bus Setting
Press theDigitalbutton on the front panel or touch the Digital descriptor box on the bottom to open

the Digital dialog box, touch Bus to open the Digital Bus dialog box.

A.

Select Bus1 or Bus2B.

Set the data format of the digital bus (binary, decimal,
unsigned decimal, and hexadecimal)

C. Set the bit width of the digital bus
D. Set the digital bus data
E.

Reset the digital bus data to the default stateF.

Enable/disable the display of the digital bus

G. Set the vertical position of the bus
H. Return to the previous menu

Bus Data Setting
The bus data setting supports setting the digital channel data by bit. Touch Data to open the bus
data setting dialog.
In this dialog, the mapping relationship between the bus bits and the digital channels is shown as
Bit.x[Dy]. For example, Bit.0[D15] means that bit 0 of the bus is D15. Touch Bit.x[Dy] to assign thedigital channel D0-D15 to the specified bit x.
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12.4

SystemSystem Info – Includes Software Version,Uboot-OS Version, FPGA Version,Serial Number andHardware Version of the SLA1016 probe.

UpgradeThe firmware here refers to the firmware of the SLA1016 probe. The SDS800X HD supports firmware
and configuration file upgrades for the SLA1016 via a U disk. Follow the steps below:
1.

Copy the upgrade file (*.ADS) to the U disk.

2.

Insert the U disk to one of the USB host ports of the oscilloscope.

3.

Touch Browse… to select the path of the upgrade file. See the chapter "Save/Recall" for thedetailed operation.

4.

Touch Upgrade to start the upgrade progress. A progress bar shows the percentage finished.

5.

After the upgrade, the SLA1016 will be removed from the system, and the oscilloscope prompts

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SDS800X HD Series User Manual"Upgrade completed. Please reconnect the Digital device."
6.

Enter the System Info dialog box again to check if the upgraded hardware version number isconsistent with the target version.

Warning: Don't cut off the power during the upgrade!

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13 Horizontal and Acquisition Setup
13.1

Timebase Setup

The timebase setup is used to adjust the scale and offset of the X (horizontal) axis. This setting applies
to all analog, digital channels, and all math traces except FFT.
Touch the timebase descriptor box and the quick menu of the timebase settings will pop up. In themenu timebase (horizontal scale), delay and other parameters can be set.

A.

Set the horizontal scale (timebase) by the virtual keypadB.

▲ to increase and ▼ to decrease the horizontal scale

C. Set the trigger delay by the virtual keypad
D. ▲ to increase and ▼ to decrease the trigger delayE.

Set the trigger delay to zeroF.

Set the trigger delay to the left part of the screen

G. Set the trigger delay to the right part of the screen
H. Open the Acquire dialog box

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13.2

Acquisition Setup

13.2.1

Overview

Touch Acquire Menu on the quick menu of the timebase settings, or touch the menu bar
Acquire > Menu to recall the Acquire dialog box on the right side.

A.

Select the interpolation mode.

B.

Select the Acq mode.

C. Select the acquisition mode (Normal & Peak Detect). See thesection "Acquisition" for details.
D. Select the Memory Management mode (Auto & Fixed
Sample Rate). See the section "Memory Management" fordetails.
E.

Select the maximum memory depth.

F.

Enter the sequence menu. See the section “Sequence” fordetails.

G. XY mode on/off.

Interpolation -- At small timebase settings, the number of original points on the screen may be lessthan the number of display pixels in the grid area, so interpolation is necessary to display a continuous
waveform. For example, at 1 ns/div timebase and 2 GSa/s sample rate, the number of original points
is 20, but the grid area includes 1000 horizontal pixels. In this case, the oscilloscope needs tointerpolate the original points by 50.


X: Linear interpolation, the simplest way of interpolation, connects two original points with astraight line.

Sinc: Sin(x)/x interpolation, the original point is interpolated according to the Nyquist
reconstruction formula, which has a good time-domain recovery effect for a sine wave. But forstep signals/fast rise times, it will introduce false overshoot due to the Gibbs phenomenon.

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X Interpolation

Sinc Interpolation

Acq Mode: “Fast” is the default setting. The SDS800X HD provides a very high waveform update
rate in fast mode. "Slow" mode will slow down the waveform update on purpose.
Memory Depth: The memory depth that can be supported. According to the formula "acquisition time
= sample points x sample interval", setting a larger memory depth can achieve a higher sample rate
for a given time base, but more samples require more processing time, degrading the waveform
update rate. SDS800X HD can obtain the best waveform refresh rate with the Memory Depth of 1
kpts. Under the full Memory Depth, SDS800X HD can still operate at full speed sampling at timebases< 5 ms/div which provides high resolution captures for long time duration events.
XY Mode: A frame of data input by C1 is used as the x-axis, and a frame of data input by C2 is usedas the y-axis to display the relationship between the two signals. XY mode is usually used to draw a
Lissajous diagram or volt-ampere diagram of components.

13.2.2Acquisition

The acquisition mode is used to determine how to acquire and process the signal.
Normal: The oscilloscope samples the signal with equal time intervals. For most waveforms, the best
display effect can be obtained using this mode.

Peak Detact: Peak detect mode. The oscilloscope acquires the maximum and minimum values ofthe signal within the sample interval so the peak (maximum-minimum) in the interval is obtained. Thismode is effective to observe occasional narrow pulses or spurs with a low sample rate, but the noise
displayed is larger. In peak mode, the oscilloscope will display all pulses with a pulse width longer
than 2ns.

In the following example, a narrow pulse sequence with a pulse width of 16.3 ns and a frequence of
200 Hz is sampled at a 5 MSa/s sample rate in normal mode and peak mode. As we can see, because
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the sample interval (200 ns) is much larger than the pulse width (16.3 ns), it is difficult to capture thenarrow pulses in normal mode, but peak mode can ensure that each pulse is captured.

Normal mode

13.2.3

Peak mode

Memory Management

Memory Management controls how the instrument stores the acquired samples.
Auto: The default acquisition setting. After setting the maximum memory in the Auto mode, theoscilloscope automatically adjusts the sample rate and memory depth according to the time base.
The adjustment principle is to follow the formula:Sample rate = number of samples/time of acquisition
Where the time of acquisition is the time corresponding to the full display (i.e. 10 horizontal divisions).

Note: The maximum memory here is the upper limit of the memory space allocated by
the oscilloscope. The actual sample points are related to the current time base and may
be less than memory depth. The actual sample points information can be obtained in
the timebase descriptor box (see the section "Timebase and Trigger Descriptor Boxes"for details).
Fixed Sample Rate: The sample rate is fixed as set, and the oscilloscope automatically adjusts
memory depth according to the time base. The time of acquisition is the time corresponding to the full
display (i.e. 10 horizontal divisions).

Note: At Fixed Sample Rate, it is necessary to pay attention to whether the set sample
rate meets the Nyquist sample theorem with respect to the highest frequency of the
input signal. If the set sample rate is less than twice the maximum frequency of the input
signal, distorted signals will be obtained due to sampling aliasing.

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13.2.4

Roll Mode

Press theRollbutton on the front panel to enter roll mode. In this mode, the waveform moves

across the screen from right to left, similar to a strip chart recorder. The horizontal delay control of the
waveform will be disabled when roll mode is active. It only operates at timebase values of 50 ms/div
and above.
If you would like to stop the display in Roll mode, press theand restart an acquisition in Roll mode, press the

Run/Stop

Run/Stop

button. To clear the display

button again.

Note: Zoom is only supported after Stop in Roll mode.

13.2.5

Sequence

Touch Acquire > Sequence to recall sequence dialog box.

A.

Turn on or off sequenceB.

Set the segment

Sequence mode is a fast acquisition mode, which divides the memory depth into multiple segments(up to 80,000), each of which stores a single shot. In sequence mode, the oscilloscope only acquires
and stores data without processing and displaying, until the specified segments are acquired. As aresult, the dead time between trigger events is minimized, thus greatly improving the waveform update
rate. If sequence mode is enabled, the display will not update until all of the sequences have beenacquired. The SDS800X HD can achieve a minimum 2 us trigger interval in Sequence mode,
corresponding to a waveform update rate of 500,000 wfm/s.
After the acquisition is finished, the oscilloscope will map all the segments together to the screen. If
you need to view and analyze each frame separately, history mode will help (see the section "History" for details). History mode provides timestamp labels for each segment.
In addition to minimizing the dead time, another advantage of Sequence mode is that it can capture
and record rare events over long periods. The oscilloscope can capture multiple events that satisfy
the trigger conditions, ignoring the periods of no interest between adjacent events, thus maximizing
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selected segments.

Example:Input a pulse sequence with a period of 20 ms to C1. The rise time of the pulse is 2 ns, while fall timeis 200 ns; pulse width is 200 ns, and amplitude is 3.2 Vpp. Press the

AutoSetupbutton on the front

panel.
Set the coupling mode of C1 to DC1M, and vertical scale to 1 V/div, vertical offset to 0. Set the trigger
level to 0.

In normal mode, 3 pulses can be obtained on the screen with the sample rate of 2GSa/s
at the maximum memory depth.

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Set the trigger mode to "Single", the timebase to 100 ns/div. Turn on the Sequence mode, and set
the segments to maximum (45976 in this example, up to 80,000 depending on the number of samples
at the current time base). Wait patiently until the acquisition completes, then all the waveforms
satisfying the trigger conditions are displayed on the screen.

In Sequence mode, there is no waveform displayed on the screen until the acquisition
is completed. During acquisition, there is a counter on the screen indicating the numberof segments that have been acquired.

In the example, 45976 pulses can be obtained with the sample rate of 2 GSa/s at the
maximum memory depth.

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13.3

History

Touch Analysis > History to recall the history dialog box.

A.

Turn on or off history mode

B.

Specify the frame index

C. Turn on or off the list
D. List time type
E.

Set the playing mode

F.

Play backward, pause, and play forward

G. Set the time interval between two frames
when playing automatically
H. List displays the frame index and timelabel for each frame

The oscilloscope automatically stores acquired frames. It can store up to 80,000 frames but the
number may vary due to the memory depth and timebase settings. Turn on history mode, then thestored frames can be recalled and measured.
Continue with the example in the section above. In Sequence mode, all waveforms that satisfy thetrigger conditions are mapped to the display. If you need to observe a single frame, you can use
history mode.
To enable history mode, touch the Frame No. . area twice, then the virtual numeric keypad pops
up. Input the number "5412" to specify the 5412th segment (frame).

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Observing the 5412th frame captured by Sequence in history mode
Touch the List area, turn on the list, in which the time label corresponding to the 5412th waveform
is displayed. The time resolution is microseconds. Time label types include Acq Time or Delta T ,AcqTime corresponds to the absolute time of the frame, synchronized with the real-time clock of theoscilloscope; Delta T is the acquisition time interval between adjacent two frames, it is shown as 20ms
in the following diagram, which is consistent with the period of the actual waveform.

Acq Time label

Delta T label

In addition to manually specifying a frame, history mode supports autoplay:Press thesoftkey to replay the waveform from the current frame to the first.

Press thesoftkey to stop replay.

Press thesoftkey to replay the waveform from the current frame to the last.

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Touch the Interval Time area to control the speed of automatic play. In the process of automaticplay, the list will automatically scroll to the current frame.
Note: When a measurement is enabled in history mode, if the Interval Time is set to small (e.g. in us)
the speed of automatic play may not meet the setting, because measurements may take a longer
time for each frame.

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14 Zoom
The SDS800X HD supports waveform zoom in the horizontal andvertical directions. Press down the horizontal knob or the

buttonon the front panel to turn on the zoom function.

When the Zoom function is on, the waveform area is divided into upper and lower parts. The area of
about 1/3 height above is the main window, and the area of about 2/3 height below is the zoom window.
Touch a window to activate it. The currently activated window is highlighted by the dashed line.

The area not covered by the gray background in the main waveform area is the range to be zoomedin (zoom area). Touch the Zoom Vertical Parameters and Zoom Horizontal Parameters regions shownin the figure above to recall the quick dialogs for setting the vertical and horizontal parameters of thezoom window.

Zoom setting
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When the zoom window is activated, the zoom area can be expanded or compressed by rotating thehorizontal and vertical scale knob. Rotating the horizontal and vertical position knob to move theposition of the region. When the main window is activated, the scale knobs and position knobs areused to change the scale and delay/offset of the main window. The operations above can also be
performed by different gestures. Below is the example of changing the setting in the horizontal
direction by gestures. The gestures for changing the setting in the vertical direction are similar.

Adjust the horizontal position of the zoom area by dragging left and right in the zoom area of themain window or waveform in the Zoom window
Adjust the vertical position of the zoom area by dragging up and down in the zoom area of themain window or waveform in the Zoom window.
Double click a location in the main window toquickly set the center of the zoom area.

Adjust the horizontal position of the waveformby dragging left and right in the gray area of themain window
Adjust the vertical position of the waveform by
dragging up and down in the gray area of themain window.

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Adjust the horizontal scale of the Zoom window by horizontal pinch and spread in the zoom areaof the main window or the Zoom window
Adjust the vertical scale of the Zoom window by vertical pinch and spread in the zoom area of themain window or the Zoom window.
Adjust the horizontal/ vertical scale of the main
window by using a pinching or spreading
gesture in the gray area of the main window

Note: Zoom traces (Z1~Z4) can be used as the source of Measurement and Math Mask tests.

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15 Trigger
15.1

Overview

The oscilloscope only acquires waveforms of interest (i.e. the ones that satisfy the trigger condition)
and aligns all trigger events at the trigger position to form a stable waveform display. The trigger is
one of the most important features of an oscilloscope since we can only analyze a signal that we cantrigger reliably and stably.
The trigger position is movable on the display. The following diagram shows the structure of theacquisition memory. The acquisition memory is divided into pre-trigger and post-trigger buffers andthe boundary between them is the trigger position. Before the trigger event arrives, the oscilloscope
fills the pre-trigger buffer first, and then continuously updates it in FIFO mode until the trigger event
arrives. After the trigger event, the data fills the post-trigger buffer. When the post-trigger buffer is full,an acquisition is completed.

Trigger Event

Pre-trigger Buffer

Post-trigger Buffer

Acquisition Memory

Below is the definition of the states in the process of filling the acquisition memory:
Arm: The pre-trigger buffer is not full, and the oscilloscope does not respond to any trigger events.
Ready: The pre-trigger buffer is full, and the oscilloscope is waiting for the trigger event.
Trig’d: A trigger event is detected and the oscilloscope starts to fill the post-trigger buffer.
Trigger settings should be based on the features of the input signal. For example, a sine wave with arepeatable period can be triggered on the rising edge; for capturing hazards in a combinational logic
circuit, the pulse trigger can be set. You need to have some knowledge of the signal-under-test to
quickly capture the desired waveform.

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15.2

Trigger Setup

Touch the trigger descriptor box to display the quick menu of trigger settings. The trigger setup dialog
box is displayed on the right side of the screen.

A.

Touch the level region and rotate the Level knob on
the front panel to adjust the trigger level; touch theregion again and the virtual keypad will be available

B.

▲ to increase and ▼ to decrease the trigger level

C. Set trigger level to the vertical center of the waveform
automatically
Quick menu

D. Set the trigger mode to "Auto", which is equivalent topressing theE.

button on the front panel

Set the trigger mode to "Single", which is equivalent topressing the

F.

Auto

Singlebutton on the front panel

Set the trigger mode to "Normal", which is equivalent
to pressing theNormalbutton on the front panel

G. Set the trigger mode to "Force", No key control, see thechapter "Trigger Mode" for details

Trigger setup dialog box:
A.

Select trigger type

B.

Select the trigger source

C. Select the trigger slope (When the trigger type is “Edge”,“Slope” and other specific types)
D. Set holdoff (None & Time)E.

Set trigger coupling mode (DC/AC/LF Reject/HF Reject)

F.

Enable/disable Noise Rejection. When Noise Reject ison, the trigger hysteresis is increased, so the noise
immunity of the trigger circuit is better. As a compromise,
the trigger sensitivity degrades

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Trigger Related Label

Trigger level Indicator

Horizontal 0 position Indicator

Horizontal 0 position(out of screen) Indicator

15.3

Trigger Level

Both analog and digital triggers must have a correct trigger level value. The oscilloscope judges
whether a waveform satisfies the trigger condition when it crosses the trigger level. If it does, thecrossing time is the trigger position. In the following figure, the trigger condition is set as a rising edge.
When the signal with a positive slope crosses the trigger level, the trigger condition is satisfied andthe time point the signal crosses the level is the trigger position.

In some special triggers, the system will automatically set the trigger level, such as using AC Line as
the trigger source.

15.4

Trigger Mode

The trigger mode determines how the oscilloscope acquires waveforms.
Auto: An internal timer triggers the sweep after a preset timeout period if no trigger has been foundso that the oscilloscope continuously updates the display whether a trigger happens or not. Auto modeis suitable for unknown signals or DC signals.

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Note: In Auto mode, if the signal satisfies the trigger conditions but cannot trigger the oscilloscope
stably, it may be that interval between two trigger events exceeds the timeout period. Try Normal
mode in this case.
Normal: Triggers and acquisitions only occur when the trigger conditions are met. Otherwise, theoscilloscope holds the last waveform on the display and waits for the next trigger. Normal mode issuitable for acquiring:

Only events specified by the trigger settings

Rare events

Single: Captures and displays a single frame that satisfies the trigger conditions, and then stops. The
following trigger events are ignored until the Single acquisition is restarted. Single-mode is suitablefor:

One-shot events or periodic signals, such as power-on\off waveforms on a power railRare events

Force: Forces a frame to be triggered regardless of whether the input signal meets the trigger
conditions. Under different trigger modes, the manifestations are different:

Auto: After a forced trigger for one frame, return to Auto trigger, forcing only one frame
refresh effect;Normal: After a forced trigger for one frame, return to Normal trigger;Single: After forcibly triggering a frame, return to Stop mode.

Since the front panel does not have forced trigger button, a shortcut for forced trigger is added to the
top trigger drop-down menu and the bottom trigger information pull-up menu.

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15.5

Trigger Type15.5.1

Overview

The trigger modes of the SDS800X HD are digital designs. Compared with analog trigger circuits,
digital triggers can not only greatly optimize trigger precision and trigger jitter, but also support multiple
trigger types and complex trigger conditions.
Edge-- Trigger on a rising edge, falling edge or both
Slope-- Trigger when an edge crosses two thresholds that lie inside or outside aselected time range
Pulse--Trigger at the end of a pulse when the pulse width lies inside or outside aselected time range
Video--TV trigger on falling edge

Window--Trigger when the signal leaves the widow region.
Interval--Trigger on the second edge when the time between the edges is inside oroutside a selected time range
Dropout--Trigger when the signal disappears for longer than the Dropout value.
Runt--Trigger when a pulse crosses the 1st threshold but not the 2nd before recrossing the 1st threshold again
Pattern-- Trigger when pattern condition transitions from false to true. All inputs set to
DC coupling
Serial--Trigger on specified condition in a serial bus. See the chapter "Serial Trigger
and Decode" for details.
Qualified -- Trigger with edge trigger setting only after the qualifying condition issatisfied
Nth Edge –Trigger on the Nth edge of a burst that occurs after a specified idle time
Delay --Trigger when the delay time between source A and source B meets the limit
condition
Setup/Hold --Trigger when the setup time or hold time meets the limit condition

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15.5.2

Edge Trigger

Edge trigger distinguishes the trigger points by seeking the specified edge (rising, falling, alternating)and trigger level. The trigger source and slope can be set in the trigger dialog box.

Touch the Source area to select trigger source, and touch the Slope area to select rising, falling,or alternating.
Rising -- Only trigger on the rising edge
Falling -- Only trigger on the falling edge
Alternating -- Trigger on both rising edge and falling edge
Holdoff, coupling, and noise reject can be set in edge trigger, see the sections "Holdoff", "Trigger
Coupling" and "Noise Reject" for details.
Note: Press the

15.5.3

Auto Setup

button, and the oscilloscope will set the trigger type to Edge.

Slope Trigger

The slope trigger looks for a rising or falling transition from one level to another level in the specified
time range. For example, positive slope time is defined as the time difference between the twocrossing points of trigger level lines A and B with the positive edge as shown in the figure below.

Touch the Source area to select trigger source, and touch the Slope area to select rising or
falling.
Rising -- Only trigger on the positive slope
Falling -- Only trigger on the negative slope
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Adjust Upper/Lower Level
The slope trigger requires upper and lower trigger levels.
When the trigger type is slope trigger, touch the trigger
descriptor box, and the pop-up quick menu will show twolevels.

The upper/lower level can be set in the following two ways:
1.

Touch the Level Upper area in the quick menu to select the upper level, and then set the levelvalue by the virtual keypad or the Level knob on the front panel. To set the lower level is similar.

2.

Use the Level knob on the front panel directly to set the level value. Press the knob to switch
between upper and lower levels, and rotate it to set the value.

The lower level should always be less than or equal to the upper level. In the trigger descriptor box,
the lower level is displayed.
Set Limit Range
Touch theLimit Range

area in the trigger dialog box to select the time condition and set thecorresponding time in the Upper Value / Lower Value area.
Less than a time value (<=) -- Trigger when the positive or negative slope time of the input signal islower than the specified time value.
Great than a time value (>=) -- Trigger when the positive or negative slope time of the input signal
is greater than the specified time value.
Within a range of time values ([--,--]) -- Trigger when the positive or negative slope time of the input
signal is greater than the specified lower limit of time and lower than the specified upper limit of timevalue.
Outside a range of time value (--][--) -- Trigger when the positive or negative slope time of the input
signal is greater than the specified upper limit of time and lower than the specified lower limit of timevalue.
Holdoff, coupling, and noise reject can be set in slope trigger, see the sections "Holdoff", "Trigger
Coupling" and "Noise Reject" for details.

15.5.4

Pulse Trigger

Trigger on a positive or negative pulse with a specified width. Trigger source, polarity (positive,

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negative), limit range, and time value can be set in the trigger dialog box.

Less than a time value (<=) -- Trigger when the positive or negative pulse time of the input signal islower than the specified time value. Below is an example of a trigger condition set to a positive pulse
width < 100ns

Great than a time value (>=) -- Trigger when the positive or negative pulse time of the input signal
is greater than the specified time value. Below is an example of a trigger condition set to a positive
pulse width > 100ns

Within a range of time values ([--,--]) -- Trigger when the positive or negative pulse time of the input
signal is greater than the specified lower limit of time and lower than the specified upper limit of thetime value. Below is an example of a trigger condition set to 100 ns < positive pulse width < 300 ns.

Outside a range of time value (--][--) -- trigger when the positive or negative pulse time of the input
signal is greater than the specified upper limit of time and lower than the specified lower limit of thetime value.
Holdoff, coupling, and noise reject can be set in pulse trigger, see the sections "Holdoff", ”Trigger
Coupling" and "Noise Reject" for details.

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15.5.5

Video Trigger

Video trigger can be used to capture the complicated waveforms of most standard analog video
signals. The trigger circuitry detects the vertical and horizontal interval of the waveform and producesa trigger based on the video trigger settings you have selected. The SDS800X HD supports standard
video signals for NTSC (National Television Standards Committee), PAL (Phase Alternating Line),
HDTV (High Definition Television), and a custom video signal trigger.
Source, standard, and synchronization mode can be set in the video trigger dialog box. When thesynchronization mode is "Select", line and field can be specified.
Touch the Standard and select the video standard. The SDS800X HD supports the following video
standards:
TV Standard

Scan TypeSync Pulse

NTSC

Interlaced

Bi-level

PAL

Interlaced

Bi-level

HDTV 720P/50

Progressive

Tri-level

HDTV 720P/60

Progressive

Tri-level

HDTV 1080P/50

Progressive

Tri-level

HDTV 1080P/60

Progressive

Tri-level

HDTV 1080i/50

Interlaced

Tri-level

HDTV 1080i/60

Interlaced

Tri-level

Custom--The table below shows the parameters of the custom video trigger:
Frame Rate

25Hz, 30 Hz, 50 Hz,60 Hz

Of Lines

300 ~ 2000

Of Fields

1,2,4,8Interlace

1:1, 2:1,4:1,8:1

Trigger Position

Line

Field

(line value)/1(1:1)

1(line value)/2 (2:1)

1,2, 3, 4,5,6,7,8(line value)/4(4:1)

1,2, 3, 4,5,6,7,8(line value)/8(8:1)

1,2, 3, 4,5,6,7,8

Line value: The number of lines set in the Of Lines (300 ~ 2000).

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In the custom video trigger type, the corresponding "Of Fields" varies with the selection of the“Interlace” ratio. Therefore, the number of fields selected and the number of lines corresponding toeach field can also be varied. If the "Of Lines" is set to 800, the correct relationship between them is
as follows:

Of Lines

Interlace

Of Fields

Trigger Line

Trigger Field

800

1:1

1

800

1

800

2:1

1/2/4/8400

1/1~2/1~4/1~8

800

4:1

1/2/4/8200

1/1~2/1~4/1~8

800

8:1

1/2/4/8100

1/1~2/1~4/1~8

Set the video trigger for a video signal
Touch Sync for trigger mode selection, video trigger mode has "Any" and "Select" options. In "Any"mode, the video signal can be triggered on any line that meets the conditions. In the "Select" mode,the signal can be triggered by a specified field and a specified line.
For progressive scanning signals (e.g. 720p/50, 720p/60, 1080p/50, 1080p/60), only the specified line
can be selected to trigger when the synchronization mode is “Select”.
For interlaced scanning signals (such as NTSC, PAL, 1080i/50, 1080i/60, Custom), when thesynchronization mode is "Select", the specified line and the specified field can be selected to trigger.
The following table shows the corresponding relations between line and field for all video standards(except for Custom)Standard

Field 1

Field 2NTSC

1 to 263

1 to 262

PAL

1 to 313

1 to 312

HDTV 720P/50 , 720P/60

1 to 750

HDTV 1080P/50 , 1080P/60

1 to 1125

HDTV 1080i/50 , 1080i/60

1 to 563

1 to 562

To gain familiarization with the video trigger, try these two examples:

Trigger on a specific line of video (NTSC standard)

Use “Custom” to trigger video signals

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Trigger on a Specific Line of Video
Video trigger requires that any analog channel can be used as the trigger source with asynchronization amplitude greater than 1/2 grid. The example below sets to trigger on Field 1, Line
22 using the NTSC video standard.
1.

Press theSetup

button on the front panel to open the trigger menu.

2.

In the trigger menu, touch Type and select "Video".

3.

Touch the Source and select C1 as the trigger source.

4.

Touch the Standard and select the "NTSC".

5.

Touch the Sync and select the "Select" to make the Field and Line optional, then select "1" inthe "Field", and set the "Line" to "22" by using the universal knob or the virtual keypad.

Trigger on a Specific Line of Video (NTSC)
Use “Custom” to Trigger Video Signals
Custom video trigger supports video signals with frame rates of 25, 30, 50, and 60 Hz respectively,
and the specified row is within the range of 300 to 2000. The following describes how to trigger a"Custom" video signal.

1.

Press the2.

In the trigger menu, touch the Type , and select the "Video".

3.

Touch the Source and select C1 as the trigger source.

4.

Touch the Standard and select the "Custom".

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5.

Touch the Custom Setting to open the custom setting menu, and touch the Interlace toselect the required interlace ratio (assuming that the interlace ratio is 8:1). Then set the frame
rate, select the number of lines and the number of fields.

6.

Touch the Sync to select the synchronization mode for the input signal:a)Select the "Any" mode, and the signal can be triggered on any line that meets the trigger
condition.

b)

Select the "Select" mode, then set the specified line and the specified field to trigger thesignal. Assuming that the "Field" is set to 8, you can select any field from 1 to 8, and eachfield can choose any line from 1 to 100.

15.5.6

Window Trigger

The window trigger is similar to the edge trigger, except that it provides an upper and a lower trigger
level. The instrument triggers when the input signal passes through the upper level or the lower level.
There are two kinds of window types: Absolute and Relative. They have different trigger leveladjustment methods. Under the Absolute window type, the lower and the upper trigger levels can be
adjusted separately. The relative window provides adjustment for the Center value to set the window
center and the Delta value to set the window range. In this mode, the lower and the upper trigger
levels always move together.



If the lower and the upper trigger levels are both within the waveform amplitude range, theoscilloscope will trigger on both rising and falling edges.



If the upper trigger level is within the waveform amplitude range while the lower trigger levelis out of the waveform amplitude range, the oscilloscope will trigger on the rising edge only.



If the lower trigger level is within the waveform amplitude range while the upper trigger levelis out of the waveform amplitude range, the oscilloscope will trigger on the falling edge only.

To set window trigger via the Absolute window type
Refer to "Adjust Upper/Lower Level" in the section "Slope Trigger".
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To set window trigger via the Relative window type
When the window trigger type is set to "Relative", touch
the trigger descriptor box. The pop-up menu will show
two user-defined parameters: “Level +/-Delta" and "Level
Center".

The above two parameters can be set in the following two ways:
1.

Select the parameter in the Level +/-Delta area of the quick menu, then set the parametervalue by the virtual keypad or the Level knob on the front panel. To set the center level is similar.

2.

Directly use the Level knob on the front panel. Press the knob to switch between “Level +/-Delta"
and "Level Center", and rotate it to set values.

Note: “Level +/-Delta” represents half of the actual window area. For example, when the value is
200mV, it represents a range of ±200 mV, which is a 400mV window.
Holdoff, coupling, and noise reject can be set in window trigger, see the sections "Holdoff", "Trigger
Coupling" and "Noise Reject" for details.

15.5.7

Interval Trigger

Trigger when the time difference between the neighboring rising or falling edges meets the time limit
condition.
When the trigger condition is set as an interval between two neighboring rising edges and it is lessthan the set time value, the trigger diagram is as follows:

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Trigger source, slope (rising, falling), limit range, and time value can be set in the trigger dialog box.
Holdoff, coupling, and noise reject can be set in interval trigger, see the sections "Holdoff", "Trigger
Coupling" and "Noise Reject" for details.

15.5.8

Dropout Trigger

Dropout trigger includes two types: Edge and State.
Edge
Trigger when the time interval (△T) from when the rising edge (or falling edge) of the input signal
passes through the trigger level to when the neighboring rising edge (or falling edge) passes throughthe trigger level is greater than the set time, as shown in the figure below:

State
Trigger when the time interval (△T) from when the rising edge (or falling edge) of the input signal
passes through the trigger level to when the neighboring falling edge (or rising edge) passes throughthe trigger level is greater than the set time, as shown in the figure below:

Trigger source, slope (rising, falling), dropout type, and time value can be set in the trigger dialog box.
Holdoff, coupling, and noise reject can be set in the dropout trigger, see the sections "Holdoff", "Trigger
Coupling" and "Noise Reject" for details.

15.5.9Runt Trigger

Runt trigger looks for pulses that cross one threshold but not another as shown in the figure below:

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A positive runt pulse across through the low level but not the high level.

A negative runt pulse across through the high level but not the low level.

Holdoff, coupling, and noise reject can be set in the runt trigger, see the sections "Holdoff", "Trigger
Coupling" and "Noise Reject" for details.

15.5.10 Pattern Trigger
The Pattern trigger identifies a trigger condition by looking for a specified pattern. The SDS800X HD
provides 4 patterns: logical AND, OR, NAND and NOR combination of the channels. Each channel
can be set to "Low", "High" or "Don't Care". If all channels are set to "Don’t Care", the oscilloscope
will not trigger. The result after the logical operation is triggered from true to false, that is, triggers on
the falling edge of the combined waveform.

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Logic (AND, OR, NAND, NOR), source, limit range, and time value can be set in the trigger dialog
box.
Source Setting
Touch theSource Settingarea to recall the following dialog box and set up for each channel

separately. Each channel can be set to "Low", "High" or "Don't Care". The threshold can be
determined by setting the Level Value .
When digital channels are turned on, the logic state of the digital channel can also be set in the source
setting dialog box.

The logical setting of analog channels

The logical setting of digital channels

Limit Range
This setting is particularly useful to filter the hazard signals of combinational logic.
Holdoff can be set in pattern trigger, see the section "Holdoff" for details.

15.5.11 Qualified Trigger
The qualified trigger is an edge trigger after a user-defined qualified condition is satisfied. So aqualified trigger has two sources; one is the source of the edge trigger, and the other is the qualified
source.
The qualified types include “State”, “State with Delay”, “Edge”, and “Edge with Delay”. When the typeis “State”, the oscilloscope triggers on the first edge when the qualified source is in the specified state(High or Low). When the type is “State with Delay”, a time limit condition is also available.

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Qualified
SourceEdge
Trigger
SourceTrigger
Position

Qualified State = High
Edge = Rising

When the type is “Edge”, the oscilloscope triggers at the first edge after the specified edge (Rising or
Falling) of the qualified source; when the type is “Edge with Delay”, a time limit condition is available.

Qualified
SourceEdge
Trigger
SourceTrigger
Position

Qualified Edge = Rising
Edge = Rising

Click the Qualify Setting region to set the qualified source and threshold; Click the Edge Setting
region to set the edge trigger source, threshold, and slope.

15.5.12 Nth Edge Trigger
Nth edge trigger is similar to an edge trigger with conditions. The trigger is satisfied after meeting theuser-defined idle time and edge number conditions. As shown in the figure below, when the idle time
between the pulse trains is greater than the specified idle time, it is triggered on the third falling edgeof the pulse train.

Trigger source, slope (rising, falling), idle time, and edge number can be set in the trigger dialog box.
Holdoff, coupling, and noise reject can be set in the Nth edge trigger, see the sections "Holdoff","Trigger Coupling" and "Noise Reject" for details.

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15.5.13 Delay Trigger
A delay trigger is true when the edge of source B occurs after meeting the set conditions of source A
and a user-defined delay time. The setting of source A is similar to that of the pattern trigger and canbe used for logical "and" combination of multiple channels.

Click the SourceB Setting region to set the edge trigger source, threshold, and slope.
Click the Limit Range and Upper / Lower Value region to set the delay time condition.

15.5.14 Setup/Hold Trigger
The clock and data sources need to be set in the setup/hold trigger setting. The set-up time starts
when the data signal crosses the trigger level and ends when the specified clock edge arrives. The
holding time starts when the specified clock edge arrives and ends when the data signal crosses thetrigger level again (as shown in the figure below). When the set-up time or hold time meets the preset
time limit conditions, the oscilloscope will trigger.

Click the Clk Setting region to set the clock source, threshold, and slope.
Click the Data Setting region to set the data source, threshold, and state.

15.5.15 Serial Trigger
Refer to chapter "Serial Trigger and Decode" for detailed information.

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15.6

Trigger Source

The trigger sources supported by each trigger type are different. See the table below for details:
Trigger Type

C1~C4

AC LineD0~D15

Edge

√

√

√

Slope

√

×

×

Pulse

√

×

√

Video

√

×

×

Window√

××

Interval√×√

Dropout

√

×

√

Runt

√

×

×

Pattern√×√

Serial√×√

Qualified√××

Nth Edge

√

×

×

Delay

√

×

×

Setup/Hold

√

×

×

15.7

Holdoff

Holdoff is an additional condition for triggers and can be used to stabilize the triggering of complex
waveforms (such as a pulse series). It can be set to time.
Holdoff by Time
Holdoff time is the amount of time that the oscilloscope waits before re-arming the trigger circuitry.
The oscilloscope will not trigger until the holdoff time expires.
Use the holdoff to trigger on repetitive waveforms that have multiple edges (or other events) between
waveform repetitions. You can also use holdoff to trigger on the first edge of a burst when you know
the minimum time between bursts.
For example, to achieve a stable trigger on the repetitive pulses shown in the figure below set theholdoff time (t) to 200ns<t<600ns.
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15.8

Trigger Coupling

The coupling setting of a trigger is only valid when the trigger source is C1~C4.


DC: All of the signal’s frequency components are coupled to the trigger circuit for high-frequency
bursts or where the use of AC coupling would shift the effective trigger level.



AC: The signal is capacitively coupled. DC levels are rejected. See the datasheet for details of
the cut-off frequency.



HFR: Signals are DC coupled to the trigger circuit and a low-pass filter network attenuates highfrequencies (used for triggering on low frequencies). See the datasheet for details of the cut-off
frequency.



LFR: The signal is coupled through a capacitive high-pass filter network, DC is rejected and low
frequencies are attenuated. For stable triggering on medium to high-frequency signals. See thedatasheet for details of the cut-off frequency.

15.9

Noise Reject

Noise Reject adds additional hysteresis to the trigger circuitry. By increasing the trigger hysteresis,
the noise immunity becomes better but the trigger sensitivity degrades.

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16 Serial Trigger and Decode
16.1

Overview

The SDS800X HD supports serial bus trigger and decoding on the following serial bus protocols: I2C,
SPI, UART, CAN and LIN.
Press theSetup

button on the front panel or touch the trigger descriptor box, and then select theType as Serial in the trigger dialog box to set the serial trigger:A.

Select the type as Serial

B.

Select the serial bus protocol

C. Set the signal, including the mapping relation between
channels and bus signals, and the thresholds
D. Trigger setting

Touch the Analysis > Decode to turn on the serial decode dialog box:
A.

Set the list of decode result

B.

Select the bus to set, Bus1 and Bus2

C. Turn on/off the bus
D. Set the bus display
E.

Select the serial bus protocol

F.

Touch to set the signal, including the mapping relation
between channels and bus signals, and the thresholds.
This is similar to the signal setting of a serial trigger

G. Configure the bus protocol
H. Synchronize the settings between a serial trigger anddecode90

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Below are detailed descriptions of the trigger and decode steps for each protocol.


I2C Trigger and Serial Decode

SPI Trigger and Serial Decode

UART Trigger and Serial Decode

CAN Trigger and Serial Decode

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16.2

I2C Trigger and Serial DecodeThis section covers triggering and decoding I2C signals. Please read the following for more details:"I2C Signal Settings", "I2C Trigger" and "I2C Serial Decode".

16.2.1I2C Signal Settings

Connect the serial data signal (SDA) and the serial clock signal (SCL) to the oscilloscope, set the
mapping relation between channels and signals, and then set the threshold level of each signal. The
signal settings of decode and trigger are independent. If you want to synchronize the settings between
decode and trigger, please perform Protocol Copy in the decode dialog box.

A.

Set the source of SCL. In the example above, SCL is connected to C1.

B.

Set the threshold level of SCL.

C. Set the source of SDA. In the example above, SDA is connected to C2.
D. Set the threshold level of the SDA channel.
E.

Return to the previous menu.

F.

Threshold level line. It only appears when adjusting the threshold level.

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Copy Setting
Touch theProtocol Copyin the decode dialog box tosynchronize the settings between the trigger and decode.
A.

Copy the decode settings to trigger

B.

Copy the trigger settings to decode

C.

Return to the previous menu

Note: The synchronization is not automatic. If the settings at one place change, a copy operation isnecessary to re-synchronize.

16.2.2I2C Trigger

When the protocol is set to I2C, the following trigger conditions can be set: Start, Stop, Restart, No
Ack, EEPROM, or an R/W frame with a specific device address and data value.

Touch Trigger Setting in the I2C trigger dialog
box to select the trigger condition:

Start — The oscilloscope will be triggered when the SDA line transitions from high to low while the
SCL is high.
Stop — The oscilloscope will be triggered when the SDA line transitions from low to high while the
SCL is high.

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Restart — The oscilloscope will be triggered when another “Start” occurs before a “Stop".
No Ack — The oscilloscope will be triggered when the SDA line is high during any SCL’s ACK bit.

EEPROM — The trigger searches for EEPROM control byte value
1010xxx on the SDA bus. And there is a Read bit and an ACK bit
behind EEPROM. Set the data value and compare type according toData1 and Limit Range . If EEPROM’s data is greater than (lessthan, equal to) Data1 , the oscilloscope will be triggered at the edgeof the ACK bit behind the Data byte. The Data byte doesn’t need tofollow the EEPROM.

7 Address & Data — the oscilloscope will be triggered on the read or write frame in 7-bit address
mode.
Frame (Start: 7-bit address: R/W: Ack) — Data1 and Data2 are set to “0xXX”. If all bits match, thentrigger on the Ack bit followed by the R/W bit.

Frame (Start: 7-bit address: R/W: Ack: Data: Ack: Data2)—If all bits match, then trigger on the Ack bit
followed by the Data2.

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10 Address & Data — If all bits match, then trigger on the Ack bit followed by the Data.
Frame (Start: Address 1st byte: R/W: Ack: Address 2nd byte: Ack: Data)

If you set the trigger condition to 7 address & data or 10 address& data:

Address can be selected in the hexadecimal range of 0x00
to 0x7F (7-bit) or 0x3FF (10-bit). If the address is selected as"0xXX (7-bit address)" or "0xXXX (10-bit address)", theaddress is ignored. It will always trigger on the Ack bit
followed by the address.



Data1 and Data2 can be selected in the hexadecimalrange of 0x00 to 0xFF. If the data is selected as "0xXX", thedata is ignored. It will always trigger on the Ack bit followedby the address.



R/W Bit can be specified as Write, Read, or Don't Care.

Data Length — The data length range is 1 to 12 bytes. When the SDA data length is equal to thevalue of Date Length and address length is the same as the set value, the oscilloscope will be
triggered.


Touch the Address Length to select "7-bits" or "10-bits" to match the address of the input
signal.



Touch the Data Length and turn the universal knob or virtual keypad to set the data length tomatch the data length of the input signal.

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16.2.3I2C Serial Decode

The layout of the touch screen display when I2C decode is enabled is as follows:A.

The waveform display area shows the original waveforms of the bus signals.

B.

The bus display shows the decoding result of the bus. At most two buses can be decoded at thesame time. Touch Bus Operation of the dialog box to turn on or off the selected bus, and touch
Bus Display to select the display type of decode result (Binary, Decimal, Hex, or ASCII) andset the bus location on the display.

C. List display area. The decode result of multiple frames can be displayed in the list, in which eachrow shows the time label and decode result of a frame. Touch

Result List

to set theparameters of the list.
D. Decode dialog box.

Bus

The address value is displayed at the beginning of a frame. The write address is displayed ingreen and the read address in yellow.



W/R bit is represented by (W) and (R), followed by the address value.



Theafter a data or address byte represents ACK (acknowledgment), andindicates noacknowledgment.
The data value is displayed in white.

A red point at the end of a segment indicates there is not enough space on the display to show
the complete content of a frame, and some content is hidden, such as

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List

TIME — The horizontal offset of the current data frame head relative to the trigger position.



Address — Address value. For example, "0x2AB" means that address = 2AB withacknowledgement.



R/W — Read address or write address.



DATA — Data bytes.

Configuration
There is only one item Include R/W Bit in the configuration of the I2C decode. When it is disabled,
the address is represented separately from the R/W bit, and when it is enabled, the R/W bit isrepresented together with the address.
For example, the address 0x4E: Write: Ack, is displayed as "0x4E (W)" when the R/W bit is notincluded and is displayed as "0x9C" when the R/W bit is included.

16.3

SPI Trigger and Serial DecodeThis section covers triggering and decoding SPI signals. Please read the following for more details:"SPI Signal Settings", "SPI Trigger" and "SPI Serial Decode".

16.3.1SPI Signal Settings

Connect the CLK, MOSI, MISO, and CS signals to the oscilloscope and set the mapping relationi n t si gl en t. co m

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between channels and signals. Then set the threshold level of each signal. The process of specifying
the source and threshold is similar to "I2C Signal Settings".
CLK
In addition to specifying the source and the threshold level, for the CLK signal, it is also necessary to
specify the Edge Select .
Rising–Data latched on the rising edge of the clock.



Falling–Data latched on the falling edge of the clock.

The user can select the edge according to the actual phase relationship between the clock and thedata of the SPI bus. Referring to the following figure, when the falling edge of the clock is aligned withthe data, the rising edge is selected to latch the data. When the rising edge of the clock is alignedwith the data, the falling edge is selected to latch the data.

CS
The CS signal should be set to correct CS Type , including Active High , Active Low, and Clock
Timeout.
Active High. The CS signal needs a complete rising edge in the screen to be regarded as active.

Active Low. The ~CS signal needs a complete falling edge in the screen to be regarded as active.



Clock Timeout – It is not necessary to specify the source and the threshold level for the CS signal.
The only parameter for the CS signal is the timeout Limit, which is the minimum time that theclock signal must be held idle before the oscilloscope acquires valid data. This setting is suitable
for the case where the CS signal is not connected, or the number of oscilloscope channels is
insufficient (such as two-channel oscilloscopes).

The method of copying settings is the same as I2C signal settings. See "I2C Signal Settings" fordetails.

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Example:Connect the CLK, data and ~CS signals of an SPI bus respectively to C1, C2, and C3. Data width =8-bit, Bit order = MSB, CS polarity = active low, and 12 data bytes are transmitted in one frame.
In the SPI trigger signal menu, set the source and threshold of CLK, MISO, and CS signals, then copy
the trigger settings to decoding. Adjust the timebase, so that there is a falling edge on the CS signal
shown on the screen:

When the CS type is set to CLK Timeout, turn on Cursor, measure the clock idle time between frames
as 505 us, and measure the interval between clock pulses as 0.5 us, then set the timeout to a value
between 0.5 us and 505 us. In this example it is set to 4.5 us:i n t si gl en t. co m

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If the data width is set to be greater than 8 bits (such as 16 bits), measure the clock idle time between
8-bit data packets as 5.05 us, and then set the timeout time to a value between 5.05 and 500 us. In
this example, it is set to 80 us:

16.3.2SPI Trigger

The trigger condition for the SPI trigger is mainly about data. Touch
Trigger Setting in the dialog box to set data:
A.

Trigger Type: MISO or MOSIB.

Set the trigger position type. When set to Any, it will trigger on
the specified data. When set to Value, it will trigger on the datafrom the Start Bit

C. Set the start bit of the data value
D. Data Length: 4~96 bits when the start bit is 0
E.

Set to trigger on the specified data value. Touch
Data Value twice, and enter the value by the virtual keypad,
or touch All Same to set all bits to 0, 1, or ignored ("X")

F.

Set the bit order to MSB or LSB

G. Return to the previous menu

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16.3.3SPI Serial Decode

The configuration of SPI decoding is similar to I2C.
In the Protocol Config menu, Data Length (4-32 bit) and Bit Order (LSB or MSB) are configurable.

UART Trigger and Serial Decode

16.4

This section covers triggering and decoding UART signals. Please read the following for more details:"UART Signal Settings", "UART Trigger" and "UART Serial Decode".

16.4.1UART Signal Settings

Connect the RX and TX signals to the oscilloscope, set the mapping relation between channels andsignals, and then set the threshold level of each signal. The process of specifying the source andthreshold is similar to "I2C Signal Settings".
In the BusConfig menu of trigger or decode, the following parameters are available:
A.

Touch to select the baud rate: 600,1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200 b/s or Custom

B.

Data Length: 5~8 bit

C.

Parity Check: None, Odd, Even, Mark, or Space. If the data
is 9 bits, the 9th bit is treated as Mark parity or Space parity

D.

Select the number of stop bitE.

Set the idle levelF.

Set the bit order

G.

Return to the previous menu

The method of copying settings is the same as I2C signal settings. See "I2C Signal Settings" fordetails.

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16.4.2

UART Trigger

Touch Trigger Setting in the dialog box to set the trigger condition:A.

Source Type: RX or TX

B.

Trigger Condition: Start, Stop, Data or Error

C.

When the "trigger condition" is Data, set the compare type
to =, ＞, ＜D.

When the "trigger condition" is Data, set the data value

E.

Return to the previous menu

Trigger ConditionStart — The oscilloscope triggers when the start bit appears on the RX/TX.

Stop — The oscilloscope triggers when the stop bits appear on the RX/TX. It always triggers on
the first stop bit.



Data — Trigger on data✓

Touch Compare Type to select "=", ">" or "<".

✓

Touch Value to set the data value by the universal knob or virtual keypad. The range ofdata values is 0x00 to 0xff.



Error — The oscilloscope performs a parity check on the data according to the parity type set by
the user, and triggers if the check value is incorrect.

16.4.3

UART Serial Decode

The configuration of UART decoding is similar to that of I2C decoding.

16.5

CAN Trigger and Serial DecodeThis section covers triggering and decoding CAN signals. Please read the following for more details:"CAN Signal Settings", "CAN Trigger" and "CAN Serial Decode".
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16.5.1CAN Signal Settings

Connect the CAN_H and CAN_L signals to the oscilloscope set the mapping relation between
channels and signals, and then set the threshold level of each signal. The process of specifying thesource and threshold is similar to "I2C Signal Settings".
In BusConfig menu of trigger and Protocol Config menu of decode, baud rate can be set to: 5kb/s, 10 kb/s, 20 kb/s, 50 kb/s, 100 kb/s, 125 kb/s, 250 kb/s, 500 kb/s, 800 kb/s, 1 Mb/s or Custom.
The method of copying settings is the same as I2C signal settings. See "I2C Signal Settings" fordetails.

16.5.2CAN Trigger

Touch Trigger Setting in the CAN trigger dialog box to set the trigger condition:

Start —The oscilloscope triggers at the beginning of the frame.



Remote — The oscilloscope triggers on a remote frame with a specified ID. ID, ID Bits (11-bit or
29-bit), and Curr ID Byte (1st, 2nd, 3rd, or 4th byte) can be set. Curr ID Byte is used to specify
the byte to be adjusted when using the universal knob.



ID —The oscilloscope triggers on the data frame that matches the specified ID. ID, ID Bits (11bit or 29-bit), and Curr ID Byte (1st, 2nd, 3rd, or 4th byte) can be set.



ID + Data —The oscilloscope triggers on the data frame that matches the specified ID anddata.ID, ID Bits (11-bit or 29-bit), Curr ID Byte (1st, 2nd, 3rd, or 4th byte), Data1, and Data2 canbe set.



Error—The oscilloscope triggers on the error frame.

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16.5.3CAN Serial Decode

The configuration of CAN decoding is similar to that of I2C decoding.
On the bus:

ID is displayed in green.

LEN (data length) is displayed in light yellow.



DATA are displayed in white.

CRC is displayed in blue.

The red point at the end of a segment indicates there is not enough space on the display to show
the complete content of a frame and some content is hidden.

In the list view:Time — The horizontal offset of the current data frame head relative to the trigger position.

Type — Type of the frame. The Data frame is represented by “D” and the remote frame isrepresented by “R”.

ID — ID of the frame, 11-bits or 29-bits ID are automatically detected.

Length — Data length.



Data — Data values.



CRC — Cycle redundancy check.



Ack — Acknowledge bit.

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16.6

LIN Trigger and Serial DecodeThis section covers triggering and decoding LIN signals. Please read the following for more details:“LIN Signal Settings”, “LIN Trigger” and “LIN Serial Decode”.

16.6.1

LIN Signal Settings

Connect the LIN signal to the oscilloscope, and then set the threshold level of the signal. The processof specifying the source and threshold is similar to “I2C Signal Settings”.
In

BusConfig

of trigger andProtocol Config menu of decode, baud rate can be set to: 600

b/s,1200 b/s, 2400 b/s, 4800 b/s, 9600 b/s, 19200 b/s or Custom.
The method of copying settings is the same as I2C signal settings. See “I2C Signal Settings” fordetails.

16.6.2

LIN Trigger

Touch Trigger Setting in the LIN trigger dialog box to set the trigger conditions:

Break —The oscilloscope triggers at the beginning of the frame.



ID —The oscilloscope triggers on the frame that matches the specified ID, which ranges from
0x00 to 0x3f.



ID & Data—The oscilloscope triggers on the frame that matches the specified ID and data.ID,
Data1, and Data2 can be set.

Data Error —The oscilloscope will trigger when a data error happens.

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16.6.3

LIN Serial Decode

The configuration of LIN decoding is similar to that of I2C decoding.
On the bus:

ID is displayed in green.

LEN (data length) and CHK are displayed in blue.



DATA are displayed in white.

In the list view:Time — The horizontal offset of the current data frame head relative to the trigger position.

ID — ID of the frame.



Data length — Data length.



ID Parity — ID parity check.

Data — Data values.



Checksum — Data checksum.

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17 Cursors
17.1

Overview

Cursors are important tools when measuring signals. Rapid measurements can be performed using
cursors in both horizontal and vertical directions. The cursor types include X1, X2, X1-X2, Y1, Y2, andY1-Y2, used to indicate X-axis values (time or frequency) and Y-axis values (amplitude) on a selected
waveform (CH1/CH2/CH3/CH4/F1/F2/F3/F4/REF).
Press theCursors

button on the front panel or touch the menu Cursors > Menu to open the

cursors dialog box:

A.

Turn cursor function on or off

B.

Cursor Mode. The vertical cursors will automatically track the
waveform in Trace modeC.

Specify the cursor

D.

Set the position of the specified cursor (by gestures, universal
knob, or virtual keypad)

E.

Select the cursors type (horizontal, vertical, horizontal +vertical), this option is supported only in "Manual" modeF.

Select the source

G.

Display style of cursors text

H.

X cursor reference (Delay or Position)
Delay measures the cursor position relative to the Horizontal
Delay/Offset position
Position measures the cursor position relative to thehorizontal center of the display

I.

Y cursor reference (Offset or Position), this option is
supported only in "Manual" mode
Offset measures the cursor position relative to the
Vertical/Offset position
Position measures the cursor position relative to the verticalcenter of the display

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Cursors Mode

Manual -- Manually sets the cursors’ position. Cursors type (horizontal, vertical, horizontal +vertical) is available in this mode.

Track -- The cursor type is automatically set to "horizontal + vertical". In this mode, only horizontal
cursors are adjustable, while the vertical cursors automatically attach to the cross-point of the
cursor and the source waveform.

Measure -- Automatically indicates the measured item using cursors.

Manual Mode

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Measure Mode

Cursors TypeX (horizontal) -- Vertical dotted lines that measure horizontal time (when the source is an FFT
waveform, X cursors measure frequency).

X cursors (time)

X cursors (frequency)

X1 — The left (default) vertical dotted line. It can be manually moved to any horizontal positionon the screen.



X2 — The right (default) vertical dotted line. It can be manually moved to any horizontal positionon the screen.



X1- X2 — The difference between X1 and X2. After this option is selected, turning the universal
knob will move both X1 and X2 simultaneously.

Y (vertical) – Horizontal dotted lines that measure vertical voltage or current (depending on the unitof the selected channel). When the cursor's source is the math function, the units will match the mathfunction.
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Y1 — The upper (default) horizontal dotted line. It can be manually moved to any vertical positionon the screen.

Y2 — The lower (default) horizontal dotted line. It can be manually moved to any vertical positionon the screen.

Y1- Y2 — The difference between Y1 and Y2. After this option is selected, turn the universal
knob to move both Y1 and Y2 simultaneously.

X+Y (horizontal + vertical) -- Both the X cursors and Y cursors are enabled.

Display Mode

Display Mode Following

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Display Mode Fixed

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SDS800X HD Series User ManualFollowling – The position information of each cursor is attached to the cursor, and the difference
information is between the two cursors with arrows connected to the cursors. This mode is moreintuitive.



Fixed – The position information of each cursor and the difference between the cursors are
displayed in a region on the screen. The region can be moved by gestures to avoid covering the
waveform. This mode is relatively concise.

Cursors Reference
X cursors reference:

Fixed Delay – When the timebase is changed, the value of X cursors remains fixed.



Fixed Position – When the timebase is changed, the X cursors remain fixed to the grid positionon the display.

Y cursors reference:

Fixed Offset – When the vertical scale is changed, the value ofY- cursors remain fixed.



Fixed Position – When the vertical scale is changed, the Y-cursors remain fixed to the grid
position on the display.

Take X cursors reference as an example to demonstrate the scaling effect of different settings:

Timebase=50ns/div , X1=-50ns=-1div , X2=100ns=2div

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SDS800X HD Series User ManualFixed position, timebase is changed to 100 ns/div, the grid number of X cursors (-1div, 2div)
remains fixed. The value of X1 and X2 is changed to -100 ns, 200 ns.

Fixed delay, timebase is changed to 100 ns/div, the value of X cursors (-50 ns, 100 ns) remains
fixed. The grid number of X cursors is changed to -0.5div, 1div.

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17.2

Select and Move Cursors

The cursors can be selected and moved directly by gestures and the universal knob on the front panel,in addition, they can be selected in the cursor’s value dialog box.
GesturesDirectly touch the cursor and drag it, as shown below:

Touch the display area of △X (or △Y) in Following mode and drag it to move the two cursors
simultaneously, as shown in the figure below. This is equivalent to the operation on the cursor type
X1-X2 or Y1-Y2.

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Universal Knob
Move the cursor position by turning the universal knob on the front panel. Press the knob to selectdifferent cursor lines. For example, if the current cursor is X1, press to select X2, and press again to
select X1-X2.
Gestures move the cursor quickly but not precisely, while the knob moves the cursor precisely but not
as quickly. You can use both in combination to suit your needs: First, a rough adjustment is achievedby using gestures, and then the fine adjustment is achieved by using the universal knob.
Dialog Box
Touch the cursor value area of the dialog box, and then rotate theuniversal knob to adjust the position.

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18 Measurement
18.1

Overview

The SDS800X HD features a strong automatic measurement list. These parameters can be
automatically measured without cursors and include common measurements such as rise time, falltime, peak-peak, and period. The SDS800X HD can also measure multiple channels at the same time,showing up to 5 parameter measurements with statistics. If you wish to view more parameters on a
specified channel, then the "Simple" mode can be employed. For measuring waveform of interest ina time gate, the "Gate" function is suggested.
Some parameter measurements (such as the mean) may be a value generated by all the data in aframe. Some parameter measurements (such as period) accumulate all measurements in a frame,
but the displayed value is always the first value. If you want to know the distribution of multiple
parameters in one frame, you should use the statistics function.

A.

The waveform display area automatically compresses when the other windows are displayed

B.

Measurement parameters and statistics display area. If select the mode as “Simple”, the "Simple"
parameter area is displayed

C.

Statistics histogram display areaD.

Measure dialog box

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Press theMeasurebutton on the front panel or touch Measure > Menu to open the dialog

box.
A.

Enable/disable measureB.

Set the mode of measure: Simple or Advanced. "Simple" shows
the specified basic measurement parameters of the selectedchannel. In "Advanced" mode, the measurement parameters
can be added one by one as neededC.

Measure configuration: gate, amplitude strategy and threshold

D.

Clear all the selected measurements

E.

Select measurement parameters

F.

Tools including trend, track and measure cursor

G.

Turn on or off statistics

H.

Statistics settings: count limit, AIM limit, reset statistics andhistogram

I.

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Set the result stype to embedded or floating

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18.2

Set Parameters

Touch

Type

in the measure dialog box, or touch+in the measurement parameters andstatistics display area to open the parameter selection window:A.

Set the source of the current setting.

B.

Measurement

parameterclassification

tabs,

includingMiscellaneous, and CH Delay. Touch a tab and in theFavorite,

Vertical,Horizontal,

area will display the corresponding

parameters.
C.

Parameters. Touch the parameter to be measured to activate it, and touch it again to close theparameter.

D.

Background highlighted parameters represent it is activated. In the figure above, "Stdev" isactivated.

E.

Description of the previous selected parameter.

The correct steps to add a measurement parameter are to select the source in theselect the parameter in thearea and thenarea. For example, to add Pk-Pk measurements for C1 and Period

measurements for C2, follow the steps below:
Source > C1 > Vertical > Pk-Pk
Source > C2 > Horizontal > Period

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For the channel delay (CH Delay) measurement, because the number of sources involved is greaterthan 1, the steps to specify the source is different:

In the parameter selection area, the channel corresponding to Source A is specified first, and thenthe channel corresponding to

Source B. Finally, the measurement parameter is selected. For

example, to activate the skew between C1 and C2, you can follow the following steps:
Source A > C1 > Source B > C2 > Skew

Once a parameter is selected, it will appear in the parameter and statistical display area below the
grid:

Touch + in the blank area to add a parameter.
Touch – in the upper right corner of each parameter to close the parameter.
Touch × in the upper right corner of the area to close measurement.
Touch Clear in the dialog box to close all parameters.

The “Favorite” tab is used to store frequently used items. You can customize this tab. Up to 20 items
can be stored in it. Long-press an item to add or remove it from the “Favorite” tab. For example, to
add Pk-Pk to the “Favorite” tab:
Advanced > Type > Vertical > Pk-Pk > Add to favorite

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To remove Period from the “Favorite” tab:
Advanced > Type > Favorite > Period > Delete from favorite

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18.3

Type of Measurement

18.3.1

Vertical Measurement

Vertical measurement includes 19 parameters:

Max: Highest value in the input waveform

Min: Lowest value in the input waveformPk-Pk: Difference between maximum and minimum data values

Top: Value of most probable higher state in a bimodal waveform

Base: Value of most probable lower state in a bimodal waveform

Amplitude: Difference between top and base in a bimodal waveform. If not bimodal, thedifference between max and minMean: Average of data values



Cycle Mean: Average of data values in the first cycle

Stdev: Standard deviation of the data

Cycle Stdev: Standard deviation of the data in the first cycle

RMS: Root mean square of the data

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Cycle RMS: Root mean square of the data in the first cycleMedian: Value at which 50% of the measurements are above and 50% are below



Cycle Median: Median of the first cycleOvershoot (FOV): Overshoot following a falling edge; 100%* (base-min)/amplitudeOvershoot (ROV): Overshoot following a rising edge; 100%*(max-top)/amplitude

Preshoot (FPRE): Overshoot before a falling edge.
Equal to 100 %*( max-top)/amplitude.

Preshoot (RPRE): Overshoot before a rising edge.
Equal to 100 %*( base-min)/amplitude.



L@T: Level measured at trigger position.

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18.3.2

Horizontal Measurement

Horizontal measurement includes 17 parameters:

Period: Time between the middle threshold points of two consecutive like-polarity edges



Freq: Reciprocal of the period

Time@max: First time of maximum valueTime@min: First time of minimum value+Width: Time difference between the middle threshold of a rising edge to the middle thresholdof the next falling edge of the pulse-Width: Time difference between the middle threshold of a falling edge to the middle thresholdof the next rising edge of the pulse+Duty: Positive Duty Cycle. The ratio of positive width to period-Duty: Negative Duty Cycle. The ratio of negative width to period+BWidth: Time from the first rising edge to the last falling edge at the middle threshold-BWidth: Time from the first falling edge to the last rising edge at the middle threshold122

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Delay: Time from the trigger to the first transition at the middle thresholdT@M: Time from the trigger to each rising edge at the middle threshold

Rise Time: Duration of rising edge from lower threshold to upper threshold

Fall Time: Duration of falling edge from upper threshold to lower threshold

10-90%Rise: Duration of rising edge from 10-90%90-10%Fall: Duration of falling edge from 90-10%

CCJ: The difference between two continuous periods

18.3.3

Miscellaneous Measurements

The Miscellaneous measurements tab includes 16 parameters:+Area@DC: Area of the waveform above zero-Area@DC: Area of the waveform below zeroArea@DC: Area of the waveform

AbsArea@DC: Absolute area of the waveform+Area@AC: Area of the waveform above average-Area@AC: Area of the waveform below averageArea@AC: Area of the waveform above the average minus the area of the waveform below
average

AbsArea@AC: Area of the waveform above the average plus the area of the waveform below

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the averageCycles: Number of cycles in a periodic waveform

Rising Edges: Number of rising edges in a waveform

Falling Edges: Number of falling edges in a waveform

Edges: Number of edges in a waveform

Ppulses: Number of positive pulses in a waveform



Npulses: Number of negative pulses in a waveform

PSlope: The slope of the rising edgeNSlope: The slope of the falling edge

18.3.4

Delay Measurement

Delay measurement measures the time difference between two channels. It includes 14 delay
parameters:Phase: Phase difference between two edges



Skew: Time of source A edge minus time of nearest source B edge



FRFR: The time between the first rising edge of source A and the following first rising edge ofsource B at the middle threshold



FRFF: The time between the first rising edge of source A and the following first falling edge ofsource B at the middle threshold124

FFFR: The time between the first falling edge of source A and the following first rising edge of
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source B at the middle threshold


FFFF: The time between the first falling edge of source A and the following first falling edge ofsource B at the middle threshold

FRLR: The time between the first rising edge of source A and the last rising edge of source B at
the middle threshold

FRLF: The time between the first rising edge of source A and the last falling edge of source B at
the middle threshold



FFLR: The time between the first falling edge of source A and the last rising edge of source B at
the middle threshold

FFLF: The time between the first falling edge of source A and the last falling edge of source B at
the middle threshold

Tsu@R: Data setup time before the clock rising edge



Tsu@F: Data setup time before the clock falling edgeTh@R: Data hold time after the clock rising edge

Th@F: Data hold time after the clock falling edge

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18.4

Trend

After adding a measurement parameter, a Trend can be used to observe the long-term change of theselected measurement value over time.

A.

Measurement parameter display area

B.

Trend plot display area

C.

Reduce the range of time. Touch it to reduce the time range

D.

Current valueE.

Maximum value

F.

Minimum value

G.

Average value

H.

Count number

I.

Reset statistics

Press thethe symbol

18.5

Clear Sweeps

button or touch Reset Statistics in the measure dialog box, or touchin the statistics display area to clear and restart statistics.

Track

The measure values VS. time plot of a horizontal parameter (e.g. frequency, rise time) in one frame
can be observed when the Track is enabled.

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The upper limit of the statistic number in a frame is set in Statistics Setting > AIM Limit , whichmeans the values exceeding the limit will not be shown in the track plot.

18.6

Measurement Statistics

Measurement statistics are based on the total number of captured waveforms. In Roll mode,measurement statistics increase over time. Touch Statistics Setting in the measure dialog box torecall the Statistics Config dialog box:

A.

Set the maximum number of samples for the statistics function.
The setting range is 0 ~ 1024, or unlimited. If there is no limit,
the number of statistics will be accumulated. If there is a limit,
when the maximum number of statistics N is reached, only thelatest N measurements will be counted. When the count islimited, only the first period measurement value of each frame
is counted

B.

Set the upper limit of the statistic number in a frame. Valid only
when the count limit is set to "Unlimited". The setting range is
1 ~ 25,000

C.

Clear and restart the statistics. Pressing theClear Sweeps

button on the front panel has an equivalent effectD.

Turn the histogram on or off

E.

Return to the previous menu

Enable the Statistics function to observe the distribution of the measured values of every selectedparameter.

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Value – The current measurement

Mean – Average of all historical measurements

Min – The minimum of all historical measurements

Max – The maximum of all historical measurements



Stdev – Standard deviation of all historical measurements

Count – The number of historical measurements

Press theClear Sweeps

touch the symbol

button or touch Reset Statistics in the statistics setting dialog box, orin the statistics display area to clear and restart statistics.

When the oscilloscope detects the trace under test is clipped, an extra overflow indicator will appear
after the measurement value:
Waveform clipped at the top
Waveform clipped at the bottom
Waveform clipped at both top and bottom

18.7

Statistics Histogram

After enabling statistics on a selected measurement, you can also activate a statistical histogram. The
histogram appears at the bottom of the statistics area. This enables users to quickly view the
probability distribution of the measured parameters. The color of the histogram is consistent with themeasurement source (Channel 1 is yellow, etc.).

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Touch the histogram area of a parameter to enlarge it for details. You can move the large histogram
window position around the display by dragging. Touch the histogram of another parameter to switch
to the corresponding enlarged histogram.

A.

Parameter

B.

Histogram display area. The X-axis represents measured values and Y-axis represents theprobability, The red portion represents the current value

C.

Count of statistics

D.

Current value

E.

The bin that includes the maximum value and the probability of a value falling into it

F.

Close the enlarged histogram

18.8

Simple Measurements

Enabling Simple Measurement displays all selected measurement parameters of the specified
channel at the same time. The font color of the measurement parameters is consistent with the colorof the specified source. Yellow for Channel 1, Purple for Channel 2, etc.

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18.9

Gate

Sometimes the user may want to measure parameters for a certain specified time range of the signal
and ignore signal parts that lie outside of that range. In this case, the Gate function can be helpful.

Turn on the Gate , then two horizontal cursors A and B will appear
in the grid area. The gate setting dialog box will be displayed on theright.
Gate cursors A and B are used to define the range of time forparameter measurements. The oscilloscope only measures theparameters of the data between A and B, ignoring the data outside therange.
The setting of gate cursors is similar to that of ordinary cursors. See"Select and Move Cursors" for details.

The figure below shows a scenario in which the gate function is used to measure the peak-peakparameter of the trough of an amplitude modulated waveform:

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18.10 Amplitude Strategy
According to different types of input signals, users can choose the corresponding amplitude
calculation strategy which can measure top and bottom values with more accuracy.
Touch Config > Amplitude Strategy in the measure dialog box to recall the amplitude strategy
dialog box:

A.

Set the amplitude calculation strategy. When set to Auto, theamplitude calculation strategy will be selected automaticallyaccording to the input signal to ensure the accuracy of themeasured valueB.

Set the top value calculation strategy. When set to Histogram,the value at the upper half of the waveform will be counted, andthe value with the maximum probability will be identified as the
top value; when set to max, the maximum value of the waveform
will be identified as the top valueC.

Set the base value calculation strategy. When set to Histogram,the value at the lower half of the waveform will be counted, andthe value with the maximum probability will be identified as thebase value; when set to min, the minimum value of the
waveform will be identified as the base value

D.

Return to the previous menu

18.11 Threshold
Measurement thresholds can be defined by the user. This is more flexible than fixed thresholds. For
example, for pulse-width measurement, the threshold can be specified rather than fixed at 50%. For
rise time, the lower / upper thresholds can be specified rather than fixed at 10% / 90%.
Changing the default threshold may change the measurement results of relevant measurement items,
such as Period, frequency, +width, -width, +duty, -duty, +BWidth, -BWidth, delay, T@M, rise time, falltime, CCJ, cycles, rising edges, falling edges, edges, Ppulses, Npulses, and delay measurement.
Touch Config > Threshold in the measure dialog box to recall the threshold dialog box:

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Set measurement threshold source

B.

Set the type of thresholdC.

Set the upper valueD.

Set the middle valueE.

Set the lower value

F.

Return to the previous menu

Threshold Type
Percent : Set according to the percentage of the waveform. The setting range of lower value andupper value is 1% ~ 99%, and the low value shall not be greater than the middle value and high value
Absolute : Set according to the vertical range. The absolute threshold value depends on the verticalscale, offset and probe attenuation. These values should be set before setting absolute thresholds.
Lower and upper values are limited to the range of the screen. If any absolute threshold is greater orless than the minimum or maximum waveform value, the measurement may be invalid.

18.12 Hardware Frequency Counter
The hardware frequency counter is a stand-alone, hardware-based frequency measurement function.
Differing from the “Frequency” parameter (see section “Horizontal Measurement”) which is measured
by software, the hardware frequency counter directly uses the trigger signal as the input of a hardware
counter, which yields 7-digit frequency measurement accuracy. The accuracy of the “Frequency”
parameter measured by software is relative to the sample rate. The lower the sample rate, the worse
the accuracy. In situations where the sample rate is less than 2 times the input frequency, the results
will be incorrect. The hardware frequency counter does not have this limitation. Its result is always
shown at the top-right of the display as shown below:

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19 Math19.1

Overview

The SDS800X HD supports 4 math traces and multiple operators. Arithmetic operators: Addition (+),
subtraction (-), multiplication (x), division (/), average, ERES, identity, negation, maxhold, minhold;
Algebra operators: differential (d/dt), integral (∫dt), square root (√), absolute (|y|), sign, exp, ln, Lg,interpolate; and FFT, as well as a formula editor. The math traces are labeled with icons “F1 ~ F4”
and can be measured by the cursors or as the source of auto measurement.
Press theMATH

button on the front panel, or touch + in the channel descriptor box region andselect F1 , F2 , F3 or F4 , and then the math dialog box pops up.

A.

Select the math trace, F1-F4

B.

Turn on or off the math operation

C.

Select the function. Touch the area to recall the function
setting page, and select the source and operatorD.

Set the vertical scale of the math operationE.

Set the label text of the math traceF.

Math trace visible/hiddenG.

Set the vertical position of the math operation. The verticalscale and position of the math can also be set by knob,
referring to "Vertical Control"

H.

Enable/Disable Invert, similar to the process used in "Vertical
Setup"

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Units for Math Waveform
Different operations have different dimensions. Therefore, the specific units displayed in Scaledepend on the operation:

Math Operation

Unit

Addition (+) or
Subtraction (-)

V, A, or U**(used when the units of two sources are not consistent)

Multiplication (x)V^2, A^2, or W

Division (/)

None, Ω (Resistance unit Ohms), S (conductance unit Siemens)

FFTdBVrms, Vrms, dBArms, Arms, dBm

Identity (y) or
negation (-y)

V, A

d/dt

V/s (Volt/second) or A/s (A/second)∫dt

VS (Volt*second) or AS (A*second)√V ^ 0.5 or A ^ 0.5

|y|

V, A

Sign

V, A

Exp or Exp10

V, A

Ln or lg

V, A

intrp

V, A

19.2

Arithmetic

The SDS800X HD supports Addition, Subtraction, Multiplication, Division, Average, ERES, Identity,
Negation, Max-hold, and Min-hold.

19.2.1

Addition / Subtraction / Multiplication / Division

The SDS800X HD can perform arithmetic operations including addition, subtraction, multiplication, or
division on any two analog input channels, and the values of Source A and Source B are computed
point-by-point.
The following figure shows an example of F1 = C1 + C2:
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19.2.2

Identity / Negation

The values of Source A are computed point-by-point when identity or negation operation is chosen in
any analog channel. The following figure shows an example of F1 = -C1:

19.2.3

Average / ERES

Average -- By averaging the channel waveforms sampled multiple times, random noise on the input
signal is reduced. The higher the average number, the smaller the random noise

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ERES -- Reduce bandwidth random noise on the measured signal and improve signal-to-noise ratio
by filtering the sampling points

19.2.4Max-hold / Min-hold

The value of Max-hold and Min-hold are based on statistical calculations from multiple frames. The
following figure shows the Max-hold result.

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19.3

AlgebraThe SDS800X HD can perform algebraic operations including differential (d/dt), integral (∫dt), squareroot (√), absolute(|x|), sign, exp (𝑒 𝑥 ), exp10 (10𝑥 ), ln, lg and interpolate (Intrp).

19.3.1

Differential

The differential (d/dt) operator is used to calculate the derivative of the selected source. It is always
used to measure the instantaneous slope of the waveform, such as the slew rate of an operational
amplifier.
The differential equation is:di =y (i + dx) - y(i)dxWhere:
d = Differential result
y = Values of source datai = Data point index
dx = Differential interval
The range of “dx” in the d/dt menu is 4~ number of samples pts.

19.3.2IntegralIntegral operation integrates the waveforms on the screen or within the specified gate.
Setting Offset in the integral menu provides an approach to correct the DC offset of the source.
Small DC offsets in the input signal (or even small offset errors of the oscilloscope itself) may cause
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the integral output waveform to "ramp" up or down, as shown below:

Integral without Offset

Integral with Offset

In addition, the integral operation can be performed within a specified gate. Touch the Gate areain the math dialog box, and enable the Gate function, then set Gate A and Gate B to define
the gate. The setting of the gate cursors is similar to that of normal cursors. See "Select and Move
Cursors" for details.

19.3.3

Square RootSquare root (√) calculates the square root of the selected source. If the waveform value is negative(the waveform is below the ground level), the result is displayed as zero.

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19.3.4Absolute

Absolute（|x|）calculates the absolute value of the selected trace.

19.3.5Sign

In mathematics, the sign function or signum function (from signum, Latin for "sign") is an odd
mathematical function that extracts the sign of a real number.
The sign function of a real number x is defined as follows:
if x < 0, Sign(x) = -1,
if x = 0, Sign(x) = 0,
if x > 0, Sign(x) = 1.

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19.3.6

Exp10

The exponential operation includes the exponential operation 𝑒 𝑥 based on constant e and theexponential operation 10𝑥 based on 10.
For example: y(x) = 𝑒 𝑥 .

19.3.7

Lg

Logarithmic operation includes logarithm base e (ln) and logarithm base 10 (lg). In logarithmic
operation, if the waveform value is negative (the waveform is below the ground level), the result is
displayed as zero.
For example F1 = 𝑒 𝑥 , where x is the trigonometric wave function. F2 = ln (F1).

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19.3.8Interpolate

Between the adjacent sampling points, the waveform is interpolated according to the selectedinterpolation method and interpolation coefficient. Touch Acquire > Menu > Interpolation to
set the interpolation method, and the interpolation coefficient can be set to 2, 5, 10, or 20.

coefficient = 2

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coefficient = 20

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19.4

Filter

The filter operation in the SDS800X HD provides FIR (Finite Impulse Response) filtering with thefollowing types: Low pass, High pass, Band Pass, and Band Reject. The filters have up to 200 taps
which can reach roll-off as fast as 0.01*fs. Users just need to set the filter type and corner frequency(s),then the instrument will automatically calculate the coefficients needed for the filtering.

A.

Choose to let the scope set the sample rate automaticallyaccording to the filter setting or not. See below for details

B.

Filter type: Low pass, High Pass, Band Pass, and Band
RejectC.

Corner frequency. For Bandpass and Band Reject there
are two corner frequencies, separately named Lower
Frequency and Upper Frequency. The attenuation at thecorner frequency is around 3 dB

D.

Return to the previous menu

Adapt Sample Rate
Unlike an ideal “brick wall” filter, the actual FIR filters have their roll-off from the passband to the
stopband because of the limited number of taps. The 200-tap FIRs applied in the SDS800X HD
provide roll-off as fast as 0.01*fs (where fs is the sample rate), this means some limitations in thesetting of corner frequency at a specified sample rate. The figures below show the limitations in detail:≥0.01fs

fc

Low pass

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fs/2≥0.01fs

fc

fs/2

High pass143

SDS800X HD Series User Manual≥0.01fs≥0.02fs≥0.01fs≥0.01fs

fl

fh

fs/2

Bandpass≥0.01fs≥0.02fs

fh fs/2

flBand reject

Take a Low pass filter as an example. It requires that the corner frequency (fc) is not less than 0.01*fs(i.e. fc ≥ 0.01*fs), and the 0.01*fs wide roll-off does not exceed the 1st Nyquist zone (i.e. (fs/2) - fc ≥0.01fs). If fs = 5 GSa/s, then the legal range of the corner frequency (fc) is 50 MHz~2450 MHz.
If the expected fc is out of the legal range at some sample rate, then the sample rate needs to bechanged. For instance, when fs = 1 GSa/s, the setting fc = 5 MHz is illegal, so we must lower fs to500 MSa/s to satisfy the limitation (fc ≥ 0.01*fs).
Professional users who have prior knowledge of FIR filters and are familiar with the operation of this
instrument are encouraged to change the sample rate for the corner frequency of interest. Otherwise,
we recommend using the “Adapt Sample Rate” option. In this mode, the scope forces the Memory
Management Mode to be “Fixed Sample Rate” and automatically adjusts the sample rate to adapt tothe corner frequency setting. For details of the Memory Management Mode refer to the section“Memory Management”.

Note: Be aware that when the corner frequency is set very low the sample rate may
not satisfy the Nyquist Theorem (i.e. fs is no longer greater than or equal to twice thehighest frequency of the input). Keep the sample rate reasonable at all times.

19.5

Frequency Analysis

The result of FFT (Fast Fourier Transform) calculations is the frequency spectrum of the source signal.
The horizontal axis of the FFT display is labeled using frequency (Hz) units instead of time (seconds).
In addition, the vertical axis provides the option of logarithmic scaling (dBVrms/dBArms or dBm).

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SDS800X HD Series User ManualA.

Time-domain waveform display area

B.

Spectrum (FFT) waveform display areaC.

FFT parameter display areaD.

Dialog box

Parameter Display Area
The FFT parameters are displayed in the upper right of the spectrum waveform display area:

FFT sample rate (Sa): FFT operation results present the first Nyquist zone (DC ~ Sa/2) of thefrequency spectrum. Be aware that the FFT sample rate may be inconsistent with the sample
rate in the time domain. Assuming the max points value is set to 2 Mpts:✓

When the number of points in the time domain, N, is less than 2 Mpts, the FFT takes thenumber which is an integer power of 2 closest to N. In this case, FFT sample rate = sample
rate in the time domain.

✓

When N is greater than 2 Mpts, FFT first decimates N by D and then takes the first 2 Mpts
for the calculation. In this case, FFT sample rate = sample rate in time domain/D.
For example, in the case of sample rate in the time domain is 2 GSa/s and the number ofsamples is 10 Mpts, the FFT first decimates the samples by 4, to 2.5 Mpts, and then takes
the first 2 Mpts to calculate the spectrum. In this example, FFT sample rate = 2GSa/s ÷ 4 =
500 MSa/s.

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FFT points (Curr): The current FFT points, which is an integer power of 2. The SDS800X HD

supports up to 2 M points (2097152, to be exact).
Frequency interval (△ f): The frequency interval between two adjacent points in the FFTsequence, which is proportional to the frequency resolution.
Average count of FFT (Avg): Displayed only when the FFT mode is set to "Average", indicatingthe completed average count.
Resolution Bandwidth (RBW) - the 3dB bandwidth of the amplitude frequency response

corresponding to the time window, which is related to the fence width and different window factorsof the FFT.

Select Function as FFT in the math dialog box and touchConfig to recall the configuration dialog box:
A.

Set the maximum points (2n, n = 10 ~ 21)

B.

Set the window type (Rectangle, Blackman, Hanning,
Hamming, and Flattop)

C.

Automatically set the horizontal axis to fall span (0~fs/2)

D.

Automatically set the center frequency to the maximum
frequency component in the previous frameE.

Select the display mode (Split, Full Screen, and Exclusive)F.

Select the FFT mode (Normal, Average, and Max-Hold)G.

Set the average count in average mode

H.

Reset average

I.

Return to the previous menu

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Windows
Spectral leakage in FFTs can be considerably decreased when a window is used. SDS800X HD
provides five windows that have different characteristics and apply to different scenarios.
For example, for a two-tone signal with a very close frequency interval, it is suitable to use a Rectangle
window with the best frequency resolution. For the case where the accuracy of amplitude
measurement is critical, it is recommended to select the Flattop window with the best amplituderesolution.

Window

Characteristics

Main lobe
widthSide lobe
suppression

Maximum
amplitude error

Rectangle

The best frequency resolution
The worst amplitude resolution
It is equivalent to the case of no
window

4π/N-13 dB

3.9 dB

Hanning

Better frequency resolution
Poor amplitude resolution

8π/N-32 dB

1.4 dB

Hamming

Better frequency resolution
Poor amplitude resolution

8π/N-43 dB

1.8 dB

Blackman

Poor frequency resolution
Better amplitude resolution

12π/N-58 dB

1.1 dB

Flattop

The worst frequency resolution
The best amplitude resolution

23π/N-93 dB< 0.1dB

Display Mode

Split: Time-domain waveform and frequency domain waveform are displayed separately. The
time-domain waveform is on the upper half screen, while the frequency domain waveform islocated within the lower half of the display. In Split mode, if Zoom is enabled, the zoomed
waveform and the frequency domain waveform are displayed on the lower half screen together.



Full Screen: Time-domain waveform and frequency-domain waveform are displayed together.

Exclusive: Only the frequency-domain waveform is displayed.

Split Mode, Zoom off

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Full-Screen Mode

Exclusive Mode

FFT ModeNormal: Displays the FFT result of each frame directly.



Max-Hold: Holds the maximum value in the historic frame on the display until cleared. This modeis suitable for detecting discontinuous waves, such as sporadic pulse signals, or frequency
hopping signals. Press the

Clear Sweeps

button on the front panel to clear the max-holdwaveform.
Average: Reduces the effect of the superimposed random noise on the signal. After the FFTmode is set as Average, Average will appear under FFT Mode . The average count can be
set here, ranging from 4 to 1024. Press the

Clear Sweeps

on the front panel or touch Resetin the dialog box to restart the average counter.

Touch Vertical or Horizontal in the mathdialog box to recall the FFT vertical or
horizontal settings dialog box:
A.

Set the vertical scale and reference levelB.

Set the unit (dBVrms, Vrms, and dBm).
When the unit is dBm, the oscilloscope
will automatically calculate the dBm value
based on the Ext Load value set in
area

C.

Set the external load, which is used to
calculate the correct dBm result

D.

Return to the previous menuE.

Set the sweep mode: Linear or DecadeF.

Set the center-span frequencies and startend frequencies of the FFT waveform

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Unit
The unit of the vertical axis can be set to dBm, dBVrms, or Vrms. dBVrms and Vrms respectively using
either logarithmic or linear scaling. dBVrms is recommended to show larger dynamic ranges. dBm isa power unit, the correct result can be obtained only if the value of Ext Load is set to be consistent
with the load impedance of the actual measured signal.
Vertical Control
Touch Ref Level to set the reference level of the FFT waveform by the universal knob or the virtual
keypad. It can also be set by the offset knob shared by Decode, Digital, Math, and Ref on the front
panel.
Touch Scale to set the vertical scale of the FFT waveform by the universal knob or the virtual
keypad. It can also be set by the scale knob shared by Decode, Digital, Math, and Ref on the front
panel. The reference point for vertical scale scaling is the reference level.
Horizontal Control
Touch Center to set the center frequency by the universal knob or the virtual keypad.
Touch Span to set the frequency span with the center frequency as the center by the universal
knob or the virtual keypad.
Touch Start to set the start frequency by the universal knob or the virtual keypad.
Touch End to set the end frequency by the universal knob or the virtual keypad.
The relationship between Center, Span, Start, and End is:Center = (Start + End) / 2
Span = End – Start
FFT Tools
The SDS800X HD provides two tools for the FFT waveform: Peaks and Markers. The peaks tool can
automatically search the qualified peak points and mark them on the FFT waveform. Up to 10 peaks
are supported. Based on the peak tool, the markers tool can automatically search the qualified
harmonics, and users can control the position of each marker. Up to 8 markers are supported.

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Touch Tools in the math dialog box to recall the FFT tools dialog box:
When the FFT tool Peaks is selected, the dialog box is as follows:A.

Turn on or off the table. Turn on the table, the peaks searchedwith the limit of

Search ThresholdandSearchExcursion will be displayed in a table
B.

Turn on or off the display of peak frequency in the table

C.

Sort peaks by amplitude or frequencyD.

Set the search threshold. Only peaks larger than the limit are
shown

E.

Set the difference between the peak value and the minimum
amplitude on both sides. The difference should be greater than
the search excursion

F.

Return to the previous menu

When the FFT tool Markers is selected, the dialog box is as follows:A.

Control markers. Touch to control the display and position ofeach marker

B.

Marker on peaks. It will automatically mark the peak that meetsthe conditions of Search Threshold and Search Excursion

C.

Marker on harmonics. It will automatically mark each harmonicof the FFT waveformD.

Turn on or off the table

E.

Turn on or off the frequency display

F.

Turn on or off the delta displayG.

Set the search threshold. Only peaks larger than the peak limit
can be judged as peaks

H.

Set the difference between the peak value and the minimum
amplitude on both sides. The difference should be greater than
the search excursion, which can be determined as the peak

I.

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Note: The FFT dialog box is longer than the display. Slide the dialog box area up and down by
gestures, or scroll the mouse wheel to the view non-displayed areas.
The following shows the peaks of the FFT waveform:

Measure the FFT waveform
Press theCursors

button on the front panel to turn on the cursor function, and then specify thesource as "Math". X1 and X2 cursors can be used to measure the frequency value at the cursor
position.
Only the maximum parameter of the FFT is supported in automatic measurement.
Note: DC components in the signal may show a large amplitude near 0 Hz. If your application does
not require measurement of the DC component, it is recommended to set the coupling mode of thesource channel to "AC".

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19.6

Formula Editor

Touch Formula Editor in the operation setting page to recall the editor:

A.

Formula display text box

B.

Text box operation area, which can clear and modify the entered formulaC.

Special operators

D.

Operation source. Cx represents analog trace, Zx represents zoomed trace and Fx represents
math traceE.

The keyboard area contains the basic arithmetic operators addition (+), subtraction (-),
multiplication (*), division (/)

F.

Confirm button. After the formula is input, press the button to apply it

The following is an example of F1 = (3*C1)+1V through the formula editor:

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The following is an example of implementing nested operations between operators through theformula editor:

In this example, F1=d (C1)/dt and F2=FFT (d (C1)/dt) are equivalent to F2=FFT (F1), which isequivalent to performing FFT analysis on the differential operation results of C1 waveform.

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20 Reference
Data from analog channels or math can be saved to the reference locations (REFA/ REFB/ REFC/
REFD) in the built-in nonvolatile memory. The saved reference waveform can be recalled to becompared with the current waveform.

A.

Channel waveform

B.

Reference waveform

C.

Reference waveform descriptor box

D.

The reference dialog box

Press theRefbutton on the front panel, or touch + in the descriptor box region and select Ref

to recall the ref dialog box.
A.

Select the location of the reference (REFA / REFB/REFC / REFD)

B.

Select the source (C1~C4 and MATH)

C.

Enable/disable Display of the reference waveformD.

Set the label text of the reference trace.

E.

Save the specified waveform into the specified

location inF.

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Adjust the Reference Waveform
Set the vertical position of the reference waveform by the offset knob on the front panel, and set thevertical scale of the reference waveform by the scale knob.

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21 Search
The SDS800X HD can search for the specified events in a frame. The location of the events is
displayed with white triangle indicators. In YT mode or Roll mode with the acquisition stopped, up to
1000 events are supported. In Roll mode with the acquisition running, the number of search eventsis unlimited. The waveform can be zoomed in when the search function is enabled.

A.

Search event indicator, marking the time point of an event

B.

Total number of events marked on the displayC.

The search dialog box, hidden in this example

In the stop state, the areashows the index of the current event/total number of events. The

current event is the one in the center of the display.

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Touch the menu

Analysis> Search

to recallthe search dialog box and turn on it.

Setup Menu
Select and set the search type in the

Setup Menu

. The SDS800X HD provides five search

conditions: Edge, Slope, Pulse, Interval, and Runt.
Search Type

Setup Description

Edge

Slope: Rising, Falling, Either

Slope

Slope: Rising, Falling
Limit Range setting is available

Pulse

Polarity: Positive, Negative
Limit Range setting is available

IntervalSlope: Rising, Falling
Limit Range setting is available

Runt

Polarity: Positive, Negative
Limit Range setting is available

Search setup is similar to the corresponding trigger type. See the sections “Edge Trigger”, “Slope
Trigger”, ”Pulse Trigger”, ”Interval Trigger” and ”Runt Trigger” for details.
Copy
The SDS800X HD supports replication between search settings and trigger settings.
Copy from Trigger: Synchronize the current trigger settings to the search settings.

Copy to Trigger: Synchronize the current search settings to the trigger settings.

Cancel Copy: Cancel the last synchronization and restore the settings before it.

Note: When copying from the trigger, if the trigger type is not supported by Search, the operation isinvalid.
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22 Navigate
Touch the menu

Analysis>

Navigateto recall the navigate dialog box. The SDS800X HD

provides three navigate types: Search Event, Time, and History Frame.
Navigate by Time
The oscilloscope automatically adjusts the trigger delay according to thedirection set by the user.
Touch Type in the navigate dialog box to select the navigate type as“Time”. There are two ways to navigate by time:Touch the Time area to set the time value by the universal knob or
the virtual keypad.

Press the navigation buttons ◀ , || or ▶ on the menu to play backward,
stop, or play forward the waveform. Press the ◀ or ▶ buttons multiple
times to speed up the playing. Three speed levels are supported: Low
Speed, Medium Speed, and High Speed.

Navigate by Search Event
When the Search function is turned on and the acquisition is stopped,
Navigate is usable to find search events (see the chapter "Search" forsearch function).
Touch Type in the navigate dialog box to select the navigate type as“Search Event”.


Touch Event Num to set the event number by the universal knob or
the virtual keypad. Press the navigation buttons ◀ or ▶ on the front
panel to go to the previous or next search event.

Touch Playing Mode to set the search event playing mode.

Touch Interval Time to set the playing interval by the universal knob
or the virtual keypad.

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Touch the Event List Switch area to turn on or off the list. The list contains time labels for each
event. Touching a row in the list automatically jumps to the corresponding event. This operation isequivalent to specifying an event in the Event Num area.

Navigate by History Frame
When the history function is turned on, Navigate can be used
to play history frames (see the chapter "History" for details of
the history function).
Touch

Type

in the navigate dialog box to select thenavigate type as “History Frame”.


Touch

Frame

to set the frame number by theuniversal knob or the virtual keypad. Press the navigation
buttons ◀ , || or ▶ on the menu to play backward, stop,or play forward.
Touch List Time Type to set the display type of theevent column in the list.

Touch Playing Mode to set the history frame playing
mode.



Touch Interval Time to set the playing interval by theuniversal knob or the virtual keypad.

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The following is an example of an occasional runt signal to demonstrate how to quickly locate andfind events of interest by using the combination of Search and Navigate:

The input signal is a 5 V periodic square wave, in which
every 20 ms there is a dwarf pulse with a height of 1/3 ofthe normal amplitude:First, set the trigger type to Runt to trigger on the dwarf pulse. See the section “Runt Trigger” fordetails.

Then turn on the Search function and operate Copy from Trigger in the search dialog box so thatthe oscilloscope searches for the dwarf pulses according to the same setting as the trigger.
Set the horizontal scale to 10 ms/div, then 5 markers with ~20 ms interval are shown on the display,
indicating that a total of 5 dwarf pulses were found in the full screen of 100 ms time range:160

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Turn on the Zoom function to observe the full view of the frame and the detail of the third dwarf pulse
at the same time:

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Press the

Run/Stop

button on the front panel to stop the acquisition, and then follow the steps

Navigate > Type to select “Search Event”. The following figure shows the first dwarf pulse. In
this example, the list is enabled and the time labels of a partial event are shown in the list.

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23 Mask Test
23.1

Overview

Users can create masks and define the rule used to evaluate Pass/Fail operations. An event violating
the rule is defined as a failure and a pulse can be generated from the "Aux Out" port on the backpanel. This is very useful to find and quantify anomalies in production tests or similar batchmeasurements. When Pass/Fail is enabled, the signal output from the Aux Out is automaticallyswitched to Pass/Fail pulse.

A.

Mask area in green. Any dot violating the rule is highlighted in red, instead of the normal
waveform color.

B.

Pass/Fail information display area, including the count of passed frames, failed frames, totalframes, and the fail rate.

C.

Dialog box.

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Perform Analysis > Mask Test to open the Mask Test dialog box:

A.

Turn on/off the test.

B.

Select the source (C1~C4).

C.

Select the rule (All In, All Out, Any In, and Any Out).

D.

Set the mask.

E.

Turn on/off the Pass/Fail operation. Turning off the operation
when the test is in progress will stop the test immediately, andthe counters in the information display area will stop. Turning on
the operation again re-starts the test and all the counters arecleared. Pressing theClear Sweeps

button on the front

panel is equivalent.
F.

Turn on/off the information display.

G.

Turn on/off “Stop on Fail”. When it is “on”, the oscilloscope stops
the acquisition once it detects a failure.

H.

Turn on/off “Capture on Fail”. When it is “on”, the failure
waveform is detected, and the screenshot with the failure frame
will be stored in the external U disk.

I.

23.2

Turn on/off the sound prompt when a failure occurs.

Mask Setup

Touch Mask Setup in the Mask Test dialog box to set the mask. There are two methods to createa mask, one is by setting horizontal and vertical values, and the other is by drawing a polygon mask.

A.

Create a mask automatically according to the waveform

B.

Create a custom mask using the Mask Editor toolC.

Load the mask

D.

Return to the previous menu

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23.2.1Create Mask

The mask can be created based on an existing waveform trace.

A.

Set the horizontal spacing of the mask around the currently
displayed trace. The units are parts of the horizontal divisionsetting.

B.

Set the vertical spacing of the mask around the currently
displayed trace. The units are parts of the vertical divisionsetting.

C.

Create the mask based on settings in

D.

Save the mask.

E.

Return to the previous menu.

and.

Set the values for Mask X and Mask Y (in divisions of display graticule), and then perform
Create Mask to generate the mask. The horizontal and vertical adjustment range is 0.04~4.00 div.

X = 0.2 div, Y = 0.2 div

X = 1 div, Y = 1 div

Saving and recalling mask files (*.msk) is similar to the operation of setup files, see the chapter"Save/Recall" for details.

23.2.2

Mask Editor

The Mask Editor is a built-in tool that provides an approach to creating custom masks. Below is its
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A.

Menu bar

B.

Coordinate of the latest touched point on the display

C.

Mask edit area, which is equivalent to the grid area. In this example, a hexagon has been createdas a part of the mask

D.

ToolbarE.

Coordinate edit area. Set the X ordinate and Y ordinate by the virtual keypad and then touch the“Set Point” button the perform the ordinate update

F.

Display or hide the coordinates of the polygon vertices on the display

G.

Exit the tool

H.

Coordinate axis

Menu bar
There are 2 menus on the menu bar. The File menu includes ordinary file operations such as:New: Create a new mask file

Open: Open an existed mask file

Save: Save the current mask file

Save As: Save the current mask file to the specified path

Exit: Exit the Mask Editor tool

Note: The mask file created by the “Create Mask” cannot be recalled by the Mask Editor.
The contents of the Edit menu are equivalent to the Toolbar.
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Toolbar

Draw: Creates vertices of a polygon by touching the display or entering values incoordinate edit area

Create Polygon: Creates a polygon based on the drawn vertices by the operation Draw



Undo



Redo



Insert Point: Inserts a vertex on a selected sideEdit Polygon: Edits a polygon. Vertices, sides, and the polygon are all editable object

Delete Polygon: Deletes selected polygon

To edit a vertex, side, or polygon object, first select it, and then move it by a dragging gesture or byentering the desired value incoordinate edit area. For a side, the value is for its middle point. Fora polygon, the ordinate is for its geometric center.

Select a vertex (point)

Select a side (line segment)

Select a polygon

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23.3

Pass/Fail Rule

The Pass/Fail rule is specified at the Type region in the Mask Test dialog box.
All In: All data points must be inside the mask to pass the test. Even a single point outside themask will cause a failure.
All Out: All data points must be outside the mask to pass the test. Even a single point inside themask will cause a failure.
Any In: Any data point inside the mask will be recognized as a pass. All data points outside themask will cause a failure.
Any Out: Any data point outside the mask will be recognized as a pass. All data points insidethe mask will cause a failure.

23.4

Operation

Touch Operation to start/stop the test. Stopping a test in progress and restarting the test will clear
the count of the passed frames, failed frames, total frames, and the fail rate. Pressing theClear Sweeps

168

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24 Counter
24.1

Overview

The counter is used to measure the frequency and period of a signal or count the events happening
within it. The counter is asynchronous to the acquisition system of the oscilloscope. It can work welleven if the acquisition of the oscilloscope is stopped (indicated by a red-colored Run/Stop button)
Touch the menu Analysis > Counter to open the counter dialog box:

A.

Turn on or off Counter

B.

Select the mode: frequency, period, and totalizer

C.

Select the source (C1~C4)

D.

Set the level of the counter

E.

Turn on or off statistics

F.

Clear and restart the statistics. Pressing theClear Sweeps

button on the front panel has an equivalent effectMode
See section “Mode” for details.
Statistics
When statistics are enabled, the counter will increment the data and display the statistics results on
the screen.

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Value – The latest count
Mean – The average of all historical counts
Min – The minimum of all historical counts
Max – The maximum of all historical counts
Stdv – The standard deviation of all historical counts, used to judge the distribution of historical countparameters
Count – Number of counts obtained
Level – Counter level
Press theClear Sweeps

button or touch Reset Statistics in the measure dialog box to clear

and restart statistics.

24.2

Mode

The counter provides 3 modes. Touch mode in the counter dialog box to open the mode selection
window:Frequency: Average frequency over a set period

Period: The reciprocal of the average frequency over a set period

Totalizer: Cumulative countWhen the mode is set to totalizer, the edge of the counting source needs to be set. When the counting
gate is turned on, the counter can count only when the gate-source meets the specified conditions.
Touch Gate Setting to recall the gate setting dialog box:

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SDS800X HD Series User ManualA.

Turn on or off the gate

B.

Select the gate type: Level or After Edge

C.

Gate source display area. C1 and C2 are gate sources ofeach other, C3 and C4 are gate sources of each otherD.

When the gate type is level, set the polarity (Positive or
Negative) of the gate source. When the gate type is edge,
set the slope (Rising or Falling edge) of the gate sourceE.

Set the gate level

F.

Return to the previous menu

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25 Power Analysis
25.1

Overview

The SDS800X HD supports a power analysis function. Power analysis can help users quickly andeasily analyze and debug switching power supply design. It automatically calculates Power Quality,
Current Harmonics, Inrush Current, Switching Loss, Slew Rate, Modulation, Turn On/Turn Off,
Transient Response, PSRR, Power Efficiency, Output Ripple, etc. Full use of the Power analysis
requires a differential voltage probe like the SIGLENT DPB series, a current probe like the SIGLENT
CP series, the SIGLENT DF2001A deskew fixture, and the power analysis activation license (partnumber SDS800XHD-PA). Install the software option part number SDS800XHD-PA to permanently
enable the power analysis function.

Touch Analysis > Power Analysis to recall power analysis dialog box:

A.

Enable/Disable the test

B.

Select the analysis item (Power Quality, Current Harmonics,
Inrush Current, Switching Loss, Slew Rate, Modulation,
Output Ripple, Turn On/Turn Off, Transient Response,
PSRR, Efficiency, SOA)C.

Turn on/off the state of the analysis itemD.

Set input sourceE.

Select analysis type (Power, V Creset, I Creset)

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25.2

Power Quality

The specific measurement parameters of power quality analysis include active power, apparent power,
reactive power, power factor, power phase angle, voltage effective value, current effective value,
voltage crest factor, and current crest factor of power input of a switching power supply.
TypePower — Includes all the items to describe energy flow in a system: Active power, reactive power,
apparent power, power factor, and power phase angle.

P: Active Power =1𝑁∗ ∑𝑁−1𝑖=0 𝑉𝑖 ∗ 𝐼𝑖

S: Apparent Power = Vrms * Irms
Q: Reactive Power =√Apparent Power 2 − Active Power 2
φ: Power Phase Angle: Phase difference between voltage and currentcos φ: Power Factor, which is the ratio of active power and apparent power.
Voltage Crest -- Voltage parameters of the power input include voltage crest, voltage effective value,and voltage crest factor.
1

2
Vrms = 𝑁 ∗ √∑𝑁−1
𝑖=0 𝑉𝑖

V_Crest = Vpeak / Vrms
Current Crest -- Current parameters of the power input include current crest, current effective value,and current crest factor.
1

2
Irms = 𝑁 ∗ √∑𝑁−1
𝑖=0 𝐼𝑖

I_Crest = Ipeak / Irms

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Signal Settings
Touch Input Setup to recall input setup dialog box:

A.

Set the input voltage source

B.

Set the input current sourceC.

Set the periods displayedD.

View the connection guideE.

Return to the previous menu

Connection Guide
Touch

Input Setup>

Connection Guide

to recall the connection guide of power quality, as

shown in the figure below. Please follow the instructions in this figure for correct connections. Touchthe icon on the top right of the guide to close.

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25.3

Current Harmonics

Current harmonics are used to analyze the input current harmonics. An FFT of the selected channel
is performed to get the harmonic components. The signal settings and connection guide are the sameas the power quality test.
Configuration
Touch Config to recall the configuration dialog box:

A.

Set the frequency of the line (Auto, 50 Hz, 60 Hz, or 400 Hz)

B.

Set the standard type (IEC61000-3-2 A, IEC61000-3-2 B,
IEC61000-3-2 C or IEC61000-3-2 D)C.

Set the display type (Off, Bar Chart, or Table)

D.

Return to the previous menu

Standard
IEC 61000-3-2 is an international standard that limits mains voltage distortion by prescribing the
maximum value for harmonic currents from the second harmonic up to and including the 40th
harmonic current. There are 4 different classes in the EN 61000-3-2 that have different limit values:Class A: Balanced 3-phase equipment, household appliances excluding equipment identified asclass D, tools, excluding portable tools, dimmers for incandescent lamps, audio equipment, andall other equipment, except that stated in one of the following classes.

Class B: Portable tools, arc welding equipment which is not professional equipment

Class C: Lighting equipment.

Class D: PC, PC monitors, radio, or TV receivers. Input power P ≤ 600 W.

Parameter Description
For the first 40 harmonics, the following values are displayed:
Measured Value (RMS) -- The measured value displayed in the unit specified by the harmonic
unit parameterLimit Value (RMS) -- Limits specified by the selected standard

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SDS800X HD Series User ManualMargin (%) --The margin specified by selected standard parameters. The margin value is(standard value - measured value) / standard value * 100%

Pass/Fail State -- Determine whether the measured value is passed or failed according to theselected standard. The rows in the table or the bars in the bar chart are rendered in different
colors based on the pass / fail state. When the value is greater than 85% of the limit but less than
100% of the limit, it is defined as a critical state.

Total Harmonic Distortion（THD）=100% ∗√X22 +X23 +⋯+X2𝑛
X1, where Xn is the nth harmonic, and X1 isthe basic component.

25.4

Inrush Current

A large current far greater than the stable current may flow through at the moment of switching on a
power supply. The large current is called the inrush current. The current waveform when switching on
is shown in the figure below:

Signal Settings
Touch Input Setup to recall input setup dialog box:

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Set the input voltage source

B.

Set the input current sourceC.

Set the expected current value, the range is 100 mA ~ 500
A. The oscilloscope will set the trigger level to expectedcurrent/20 and the vertical scale of the current channel toexpected current/3

D.

Set the maximum effective input voltage (Vrms), the range
is 1 V ~ 1 kV. The oscilloscope will set the vertical scale ofthe voltage channel to maximum input voltage/6

E.

View the connection guide

F.

Return to the previous menu

25.5

Switching Loss

Switch loss analysis can be used to calculate the power dissipated in the switching period.
Deskew Calibration
A relatively small skew can cause a large measurement error of switching loss, especially during theon phase when the voltage is close to zero and the non-on phase when the current is close to zero.
This is a typical oscilloscope dynamic range limitation when trying to measure weak voltage and (or)current in the presence of relatively large switching voltage and (or) current.
To correct the skew between the oscilloscope channels or probes, the deskew procedure should be
performed once initially, and re-run when any part of the hardware setup changes (for example, adifferent probe, different oscilloscope channel, etc.) or when the ambient temperature changes. The
deskew procedures by using the DF2001A deskew fixture are as follows:A.

Demagnetize and zero-adjust the current probe

B.

Set up connections to the DF2001A deskew fixture
Small Loop
CP4020 (100 kHz,20 Arms)

Available current
probesCP4050 (1 MHz,50 Arms)
CP4070 (150 kHz,70 Arms)

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CP4070A (300 kHz,70 Arms)
CP5030 (50 MHz,30 Arms)
CP5030 (100 MHz,30 Arms)
High-voltage
differential probe
sense points

J7: signal terminal

J3: signal terminal

J6: earth terminal

J4: earth terminala.

Connect D+ and D- of the high-voltage differential probe to J7 and J6b.

Connect the current probe to the loop with the direction of the arrow indicating thedirection of the current flowc.

Make sure the switch S1 on the deskew fixture is set to the appropriate side of the fixture(either “small loop” or “large loop”)

d.

Connect the deskew fixture to a USB port on your oscilloscope or a PC using a USB
cable. The USB port supplies power to the deskew fixture

C.

Connect the voltage and current probes to the oscilloscope input channel

D.

Touch Input Setup to enter the input setup menu. Select the corresponding input channel, andthen touch Auto Deskew to perform the calibration. When the process completes, a message
will pop up indicating whether the deskew operation was successful or not.

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Before deskew calibration

After deskew calibration

Configuration
Touch Config to recall the configuration dialog box:

A.

Set the voltage reference, i.e. the switch level at the edge ofthe input switch. This value is a percentage of the maximum
switching voltage. Adjusting the value to ignore backgroundnoise. This value is used to determine the threshold
hysteresis of the switch edge

B.

Set the current reference, i.e. the switch level at the beginningof the input switch edge. This value is the percentage of the
maximum switching current. This value can be adjusted toignore background noise or invalid offset that is difficult toeliminate in the current probe. This value is used to determine
the threshold hysteresis of the switch edgeC.

Set the conduction type (Waveform, Rds(on) or Vce(sat))D.

Set Rds(on) resistanceE.

Set Vce voltage

F.

Return to the previous menu

Conduction Type
Waveform -- The power waveform uses the original data, and the calculation formula is P = V * I ,E = P * T.
Rds (on) -- In the on area (where the voltage level is lower than the voltage reference (adjustable)),the power calculation formula is P = I2 * Rds (on). In the off area (where the current level is lower thanthe current reference (adjustable)), the power calculation formula is P = 0 watt.
Vce (sat) -- In the on area (where the voltage level is lower than the voltage reference (adjustable)),the power calculation formula is P = Vce (sat) * I. In the off area (where the current level is lower thanint siglent.com

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the current reference (adjustable)), the power calculation formula is P = 0 watt.
Connection Guide
Touch

Input Setup>

Connection Guide

to recall the connection guide of switching loss, as

shown in the figure below. Please follow the instructions in this figure for connection. Touch the iconon the top right of the guide to close.

25.6

Slew Rate

The slew rate measures the change rate of voltage or current during switching.

Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of slew rate, as shown in
the figure below. Please follow the instructions in this figure for connection. Touch the icon on the top
right of the guide to close.

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25.7

Modulation

Modulation analysis measures the control pulse signal of the switching device (MOSFET) andobserves the pulse width, duty, period, frequency, and other trends of the control pulse signal in
response to different events.
Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of modulation, as shownin the figure below. Please follow the instructions in this figure for connection. Touch the icon on the
top right of the guide to close.

25.8

Output Ripple

Power supply ripple is an important parameter to evaluate DC power supply, which represents thequality of output DC voltage. Ripple analysis can measure the current value, average value, minimum
value, maximum value, standard deviation, and count of the power supply output ripple.
Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of output ripple, as shownin the figure below. Please follow the instructions in this figure for connection. Touch the icon on the
top right of the guide to close.

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25.9

Turn On/Turn Off

Turn-on analysis determines the time taken for the power supply to reach 90% of its steady-state
output. Turn-off analysis determines the time taken for the power supply to fall to 10% of its maximum
output voltage.
Signal Settings
Touch Input Setup to recall signal settings dialog box:
A.

Set the input voltage source

B.

Set the output voltage sourceC.

Set the input type (AC or DC)

D.

Set the duration, the range is 5 ns ~ 20 s. The oscilloscope
will set the timebase according to the value (duration / 10)

E.

Set the maximum effective input voltage Vrms, the range is
1 V ~ 1 kV. The oscilloscope will set the vertical scale of thevoltage channel to maximum input voltage / 7 and the trigger
level to maximum input voltage / 10.

F.

Set the stable output voltage value, the range is -30 V ~ 30
V. The oscilloscope will set the vertical scale of the output
voltage channel to stable output voltage / 6

G.

View the connection guide

H.

Return to the previous menu

Testing Conditions
Turn On -- Determines the time taken for the power to reach a certain percentage of its steady-state
output. The turning on time is between T2 and T1, where:
T1 = When the input voltage first rises to a certain percentage (usually 10%) of its maximum
amplitude
T2 = When the output DC voltage rises to a certain percentage (usually 90%) of its maximum
amplitude
Turn Off -- Determines the time it has taken for the power supply to be turned off to fall to a certain
percentage of its maximum output voltage. The turning off time is between T2 and T1, where:
T1 = When the input voltage finally falls to a certain percentage (usually 10%) of its maximum
amplitude
T2 = When the output DC voltage finally falls to a certain percentage (usually 10%) of its
maximum amplitude
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Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of turn on/turn off, as
shown in the figure below. Please follow the instructions in this figure for connection. Touch the iconon the top right of the guide to close.

25.10 Transient Response
Transient response analysis can determine the response speed of the output voltage of the power
supply to the change of the output load. This time starts from the first time that the output voltage exits
the stable band and ends at the last time that the output voltage enters the stable band.
Signal Settings
Touch Input Setup to recall input setup dialog box:
A.

Set the output voltage source

B.

Set the output current sourceC.

Set the duration. The oscilloscope will set the appropriate
time base according to the durationD.

Set the stable output voltage, i.e. the expected output DC
voltage of the power supply in a stable stateE.

Set the overshoot percentage of output voltage, which canbe used to determine the stable band value of transient
response and adjust the vertical scale of the oscilloscopeF.

View the connection guideG.

Return to the previous menu

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Configuration
Touch Config to recall the configuration dialog box:

A.

Set the input low current value. This is the expected low
current value before or after the load change

B.

Set the input high current value. This is the expected highcurrent value before or after the load change

C.

Return to the previous menu

Note: The low and high current values are used to calculate the trigger level and adjust theoscilloscope vertical scale. After the load changes, the current value changes from low to high (orfrom high to low), and the oscilloscope triggers and performs to measure the transient response
stability time.
Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of transient response, as
shown in the figure below. Please follow the instructions in this figure for connection. Touch the iconon the top right of the guide to close.

25.11 PSRR
The power supply rejection ratio (PSRR) test is used to determine how the regulator suppresses ripple
noise in different frequency ranges. The oscilloscope controls the arbitrary waveform/function
generator to output a sweep signal, which is used to introduce ripple into the DC voltage transmitted
to the voltage regulator. Measure the AC RMS ratio of input to output, and plot the relationshipbetween the ratio and frequency. The background noise of the oscilloscope is higher than that of the
network analyzer, and the sensitivity is lower than that of the network analyzer, so the PSRR
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measured by the oscilloscope is difficult to exceed -60 dB. The PSRR test is generally acceptable forsampling the overall PSRR behavior of the power supply under test.
The configuration of PSRR is the same as that of the Bode plot, see the chapter "Bode Plot" for details.
Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of PSRR, as shown in
the figure below. Please follow the instructions in this figure for connection. Touch the icon on the top
right of the guide to close.

25.12 Power Efficiency
Power efficiency analysis can test the overall efficiency of the power supply by measuring the output
power and input power. This analysis is only supported on 4-channel models because all of the input
voltage, input current, output voltage, and output current are necessary for the measurement.
Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of power efficiency, as
shown in the figure below. Please follow the instructions in this figure for connection. Touch the iconon the top right of the guide to close.

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25.13 SOA
The safe operating area (SOA) of MOSFETs defines the voltage, current, and power consumption
conditions over which the device can be expected to operate without self-damage. The oscilloscope
can automatically generate the SOA according to the Voltage Limit , Current Limit , andPower Limit parameters set in the Config

menu, and judge if the stress on the MOSFET isbeyond the SOA or not. This helps the designers to quickly find a problem or latent risk in the circuit.
Connection Guide
Touch Input Setup > Connection Guide to recall the connection guide of power efficiency, as
shown in the figure below. Please follow the instructions in this figure for connection. Touch the iconon the top right of the guide to close.

Note: Perform a Deskew operation between the voltage and current input channels before the test.
See section “
Switching Loss” for more details on deskewing.
The test steps are as followed:
1.

In the Input Setup menu, assign correct channels to Input Voltage and Input Current .
Set Duration as the expected observed duration, then the oscilloscope will automatically set
the timebase according to it.

2.

In the Config menu set Voltage Limit , Current Limit , and Power Limit parameters
according to the datasheet of the MOSFET device under test, then the oscilloscope willautomatically generate the SOA and the vertical scale of the Input Voltage and Input Current
channels according to them.

3.

Turn on Test State . The oscilloscope will begin to acquire the voltage and current waveforms,
and display the SOA measurement, showing if the measured stresses are in the SOA or not.

4.

Users can adjust horizontal, vertical, and trigger settings during the test for best observation.

Below is an example of testing the power-up stresses on a MOSFET and judging if the stresses aresafe for the MOSFET using the SOA:
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Voltage and current waveforms on the MOSFET at power-up

SOA, in which the mask is created according to the voltage limit, current limit, and power limit.
The result shows “Pass” because all the stresses are within the mask.

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26 Bode Plot
26.1

Overview

The SDS800X HD supports an automatic Bode plot function. This function provides a frequency
response curve of the device-under-test as well as the interface for output sweep parameter control
and data display settings. At this time, either the SIGLENT SAG1021I arbitrary waveform generator
or one of a SIGLENT SDG series arbitrary function generators are supported. During the sweep, theoscilloscope configures the generator output frequency and amplitude and then compares the input
signal to the output of the DUT. Gain (G) and phase (P) are measured at each frequency and plottedon the frequency response Bode plot. When the loop response analysis is complete, you can movethe markers on the chart to see the gain and phase values measured at each frequency point. You
can also adjust the scale and offset settings for the amplitude and phase plots.

Touch Analysis > Bode Plot Plot to recall Bode plot dialog box:
A.

Turn on/off the Bode plot

B.

Configure the Bode plot (DUT, AWG connection, sweep
parameters)

C.

Turn on/off the operationD.

Set display parameters, including coordinate axis, trace visibility,
and cursors

E.

Data list. Open the data list of the Bode plot to view the curve data,
save the data results to a U-disk or recall it from a U-diskF.

Set the measurement parameters. Parameter measurement ofscanning curve includes upper cut-off frequency (UF), lower cutoff frequency (LF), bandwidth (BW), gain margin (GM), and phasemargin (PM)

G.

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26.2

Configuration

26.2.1ConnectionA.

DUT input and output channels.

B.

Channel gain. When it is set to Auto, the oscilloscope will automatically adapt the vertical scaleaccording to the signal amplitude; when it is set to Hold, it will always keep the vertical scale
before the test operation.

C.

Arbitrary waveform generator connection settings. Touch Interface to select the connection
type. When selecting LAN, it needs to

Set IP

andSave

it. Touch

Test

to confirm

whether the arbitrary waveform generator is connected correctly.

26.2.2

Sweep

Touch Sweep Type to select the sweep type. There are two types: Simple and variable level.

A.

Set the sweep type

B.

Set the sweep as Continue or Single

C.

Set the sweep frequency. The frequency mode can be linear or decade. When it is set to linear,
the corresponding center frequency and span frequency need to be set; when it is set to a decade,the corresponding start frequency and stop frequency need to be setD.

Set the number of sweep points. The larger the number of points, the higher the sweep resolutionE.

Set the amplitude of the sweep signal

F.

Set the offset of the sweep signal

G.

Set the signal amplitude unit. When it is set to dB, reference level and load need to be set

H.

Set the load

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Set the sweep type to Vari-LevelB.

Set the form of scanning/measurement: continuous or single

C.

Select a profile. Up to 4 profiles can be editedD.

Set the frequency modeE.

Set the number of sweep points

F.

Set the offset of the sweep signal

G.

Set the signal amplitude unit. When it is set to dB, reference level and load need to be set

H.

Variable level signal display area

I.

Touch Edit to turn on the profile editor

Touch Nodes to set the signal node number through the universal knob, or touch ▲ to increase
the nodes and to o decrease.
Touch the cell in the table area to set the frequency and amplitude of the corresponding node. Touchto activate the cell, adjust the value through the universal knob, or touch the cell again to call up thevirtual keypad for setting.

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Display

26.3

Bode plot display settings include amplitude, phase, cursors, trace visibility and waveform type.
Amplitude
Set the amplitude coordinate axis of the Bode plot. Touch Display > Amplitude to recall theamplitude setting dialog box:

A.

Set the reference position to center or top

B.

Set the scale of the amplitude coordinate axisC.

Set the reference level, the max value of the amplitude
coordinate axisD.

Set the amplitude mode. Set to Vout to display the amplitude
value of the output signal; set to Vout/Vin to display the
amplitude ratio of the output signal to the input signal

E.

When the mode is Vout, it needs to set the unit (Vpp, Vrms,
dBV, dBu, dBm, or Arbitrary dB); when the mode is Vout/Vin,it needs to set the amplitude axis type (Linear or Logarithmic)

F.

Auto-Set. According to the output signal amplitude curve, theoscilloscope automatically sets the scale and reference level

G.

Return to the previous menu

Phase
Set the phase coordinate axis of the Bode plot. Touch Display > Phase to recall the phasesetting dialog box:

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SDS800X HD Series User ManualA.

Set the reference position to center or top

B.

Set the scale of the phase coordinate axisC.

Set the reference level, the max value of the phase coordinate
axis

D.

Set the phase unit (Degree or Rad)E.

Auto-Set. According to the output signal phase curve, theoscilloscope automatically sets the scale and reference level

F.

Return to the previous menu

Cursors
SDS800X HD can use the cursor to measure the Bode plot curve. The cursor of the Bode plot issimilar to the ordinary cursor, see the chapter “Cursors” for details. Touch Display > Cursors torecall the cursor setting dialog box.

A.

Turn on/off the cursors of the Bode plotB.

Set the cursors type (X or Y)

C.

Specify the cursor (X1/X2/X2-X1)

D.

Set the position value (by gestures, universal knob, or
virtual keypad)E.

Set the source 1

F.

Set the source 2

G.

Return to the previous menu

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SDS800X HD Series User ManualTrace Visibility
When multiple output signals are connected, the Bode plot interface will display the amplitude andphase curves of all output signals at the same time. Users can turn on/off other scanning curves toobserve the details of specific curves. Touch

Display>

Trace Visibility

to recall the setting

dialog box.

26.4

Data Analysis

With the data list, cursor measurement, and automatic measurement functions, the Bode plot curve
can be analyzed in detail. The data list provides the information of each scanning point. The cursors
can be used to flexibly measure the change of each position of the curve. The automatic measurement
function can be used to measure the five parameters of the Bode plot curve: upper cut-off frequency(UF), lower cut-off frequency (LF), bandwidth (BW), gain margin (GM), phase margin (PM).

A.

Data list display area

B.

CursorsC.

Data point location line

D.

Cursor information display areaE.

Measurement parameters display area

F.

Bode plot dialog box

Data List
Touch Data to recall the data setting dialog box:
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Turn on/off the data list

B.

Set the selected row in the list. Adjust the universal knob toset, or directly touch the list display area to select a specific
line

C.

Set the data sourceD.

Save/Recall the data. Saving and recalling the Bode plot data(*.csv) is similar to the operation of setup files, see the chapter"Save/Recall" for details

E.

Return to the previous menu

MeasureTouch Measure to recall the measure setting dialog box:

A.

Set the position of measurement items, and support 5 measurement items at mostB.

Set the measurement sourceC.

Measurement parameter area. Touch each parameter area to activate the measurement
parameter

D.

Clear all measurements

E.

Clear the current measurement

F.

Close the measurement configuration window

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SDS800X HD Series User ManualFor example, to add UF measurements for C2 and GM measurements for C3, follow the steps below:
Measure > Position > Source > UF
Measure > Position > Source > GM

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27 Display
Display settings include display type of waveform, color, persistence, grid type, trace brightness,graticule brightness, etc.
Touch the menu Display > Menu to recall the display dialog box.

A.

Switch the waveform display type to Vectors (line display)
or Dots

B.

Enable/disable color gradingC.

Set persistence

D.

Clear display. The operation clears all waveforms displaying
on the screen and clears persistE.

Set menu auto-hide timeF.

Set the menu style to Embedded or Floating. When set toEmbedded, the grid area will be compressed horizontally todisplay the complete waveform when the dialog box isdisplayed. When set to Floating, it will directly cover part of
the grid area when the dialog box is displayedG.

Select the grid type (Full Grid, Light Grid, and No Grid)H.

Set the trace intensity (0~100%)I.

Set the LCD Brightness (0~100%)

J.

Set the graticule brightness (0~100%)K.

Display the axis labelsL.

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Display Type
There is no difference between the vector and dot display types when the number of samples of aframe is greater than 1000. When the sample number is below 1000, there are some differences.


Vectors: The samples are connected by lines (i.e. interpolated) and displayed. The interpolation
methods include linear interpolation and sin(x)/x interpolation. See the section of "Acquisition
Setup" for details of interpolation.



Dots: Displays the raw samples directly.

Vector Display

Dot Display
Note: In the Run state, due to the high waveform update rate of the oscilloscope, the waveform
displayed is the superposition of multiple frames. Therefore, what is seen using the dots display is not
the discrete sampling points, but the display effect similar to equivalent sampling. Stop the acquisition
to view the original samples of each frame separately.

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Dots display in Run state
Color Grade
Color grade uses color temperature to map the probability of the waveforms. The greater the
probability that the waveform appears in a pixel, the warmer the color of the pixel. The smaller
probability, the colder the color temperature of that pixel.
The picture below shows the change of color from cold to warm.

Color grade Off

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Set Persist
With persistence, the oscilloscope updates the display with new acquisitions but does not erase theresults of previous acquisitions in the specified period. All previous acquisitions are displayed with
reduced intensity. New acquisitions are shown in their normal color with normal intensity. In
combination with SDS800X HD's high waveform update rate and persist function, in some cases
anomalies in the waveform can be found in a short time without complex trigger settings to improve
test efficiency. Below is an example to display glitches in a data sequence with infinite persistence.

When the display dialog box and persist are off, touch Display > Presistencet can quickly turnon persist.
Touch Persist in the display dialog box to set the persistence time.


Off: Turn off persist.

Variable persist time (1s, 5s, 10s, 30s): Choose different persist times. The oscilloscope
updates with the newly acquired waveform display. Acquired waveforms will be cleared after thecorresponding time has expired.

Infinite: Select “Infinite”, previous acquisitions will never be erased until a Clear Display or
Clear Sweeps

operation is performed.

Set Grid

Full Grid: Display 8*10 gridLight Grid: Display 2*2 grid

No Grid: Display without grid

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Axis Label Setting
Turn on the axis label, the horizontal axis label will be displayed at the bottom of the grid, and thevertical axis label will be displayed at the left of the grid. There are two display modes of axis: moving
and fixed.
Moving mode: When moving the waveform, the position of the axes moves with the waveform,
while the coordinates remain fixed.



Fixed mode: The position of the axes remain fixed, while the coordinates update as the
waveform is moving.

Moving mode

Fixed mode
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Window Setting
Set the display font of the system in thewindow setting menu

Large font size, suitable for use on devices.

Small font size, exquisite display, suitable for large screen display scenarios such as VNC.

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28 Arbitrary Waveform Generator
28.1

Overview

The SDS800X HD supports arbitrary waveform/function generation by incorporating an external USB
Arbitrary Waveform Generator accessory combined with the software activation using option
SDS800XHD-FG.
The AWG functions include:

6 basic waveforms: Sine, Square, Ramp, Pulse, Noise, and DC

45 built-in arbitrary waveforms



Output frequency up to 25 MHz

-3 V ~ +3 V output amplitude range±42 Vpk insulation voltage (for SAG1021I only)

Refer to the datasheet for the detailed specifications of the AWG.
SAG1021I Function/Arbitrary Waveform Generator Module

The SAG1021I function/arbitrary wave generator module
is capable of generating variant waveforms withfrequencies up to 25 MHz and amplitudes up to ± 3 V. Its
output terminals are isolated from the ground of theoscilloscope.

Connect the SAG1021I to any USB host port of SDS800X HD using a standard USB cable. Users
can edit and import arbitrary waveforms using the SIGLENT EasyWave software or import edited
waveforms through a U-disk.

SDS800XHD-FG Option
For the installation of the SD800XHD-FG option, please refer to the section "Install Options".
The oscilloscope interface will prompt "AWG device detected" after the hardware connection with the
SAG1021I is established. Press the

WaveGenbutton on the front panel, or touch the menu

Utility > Wave Gen… to recall the AWG dialog box.

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Turn on/off the output of AWG

B.

Select the waveform type (Sine, Square, Ramp, Pulse,
Noise, DC, and Arb)C.

Set the frequencyD.

Set the amplitudeE.

Set the offset

F.

Other

AWG

settings:

Outputload,

overvoltage

protection, and so on.
G.

System information and firmware upgrade

28.2

Wave TypeThe AWG function provides six standard waveforms and multiple arbitrary waveforms. The standard
waveforms are Sine, Square, Ramp, Pulse, Noise, and DC.
The following table shows all waveform types and corresponding parameters.

Wave Type

Parameters

Sine

Frequency, Amplitude, Offset

SquareFrequency, Amplitude, Offset, Duty

Ramp

Frequency, Amplitude, Offset, Symmetry

Pulse

Frequency, Amplitude, Offset, Duty

DC

OffsetNoise

Stdev, MeanArb

Frequency, Amplitude, Offset, Arb TypeThe Arbitrary waveforms consist of two types: built-in waveforms and stored waveforms. Touch
Arb Type in the AWG dialog box, and select the arbitrary in the pop-up window:

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There are 6 tabs in the window. Under each tab, a catalog of waveforms is listed. Built-in waveforms
are stored in Common, Math, Engine, Window, and Trigo. Stored waveforms are located in the Storedmenu.
Users can edit arbitrary waveforms using SIGLENT EasyWaveX PC software, send the stored
waveforms to the instrument through the remote interface, or import the stored waveforms through a
U disk.

28.3

Other Setting

Touch Setting in the AWG dialog box to recall the "Other
Setting" dialog box:
A.

Select the output load

B.

Turn on/off the OVP (Over Voltage Protection)

C.

Turn on/off the sync output. Only supported for external
SAG1021I function/arbitrary waveform generator module.

D.

Do zero adjustE.

Set to default

F.

Return to the previous menu

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Output Load
The selected output load value must match the load impedance. Otherwise, the amplitude and offsetof the output waveform of AWG will be incorrect.
OVP
When OVP is enabled, the output will be turned off automatically once the protection condition is met.
The protection condition is when the absolute value on the output port is higher than 4 V ± 0.5 V. At
the same time, a warning message is displayed.
Sync Output
When the Sync Output is turned on, the Aux In/Out port of AWG outputs a CMOS signal with the same
frequency as the basic waveform (except Noise and DC) and arbitrary waveform. The maximum
supported frequency is 10 MHz.
Zero Adjust
The output zero error of the AWG can be calibrated by using auto mode or manual mode. The objectof the Zero Adjust is: when AWG outputs 0 V DC signal, the measured mean value of thecorresponding channel is within ± 1mV.


Auto Steps: In this mode, the adjustment can only be performed with CH1 of the oscilloscope.
Connect the output of AWG to CH1 of the oscilloscope, press Auto , and the AWG will start toautomatically adjust. The scope will display “Zero adjust completed!” when the adjustment is
done.



Manual Steps: The AWG can be manually calibrated through any channel on the oscilloscope.
Take CH2 as an example:
1.

Connect the output of AWG to CH2, open CH2, set it to DC coupling, turn on the bandwidth
limit, and set the probe attenuation to 1X.

2.

Set the vertical scale of CH2 to a small scale such as 1 mV/div. Turn on Measure and set
the parameter to the Mean of CH2.

3.

Press Manual and rotate the universal knob to adjust the compensation value, until themean value of CH2 is within ±1 mV, and then press Save .

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28.4

SystemDevice Info – Includes Model, Serial Number, Firmware Version, and Hardware Version of the AWG
module.
UpgradeThe firmware here refers to the firmware of the SAG1021I module. The SDS800X HD supports
firmware and configuration file upgrades for the SAG1021I via a U disk. Follow the steps below:
1.

Copy the upgrade file (*.ADS) to the U disk.

2.

Insert the U disk to one of the USB host ports of the oscilloscope.

3.

Touch Browse… to select the path of the upgrade file. See the chapter "Save/Recall" for thedetailed operation.

4.

Touch Upgrade to start the upgrade progress. A progress bar shows the percentage finished.

5.

After the upgrade, the SAG1021I will be removed from the system, and the oscilloscope prompts"Upgrade completed. Please reconnect the AWG device."

6.

Enter theSystemdialog box again to check if the upgraded hardware version number isconsistent with the target version.

Warning: Don't cut off the power during the upgrade!

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29 Save/Recall
The SDS800X HD supports saving setups, reference waveforms, screenshots, and waveform data
files to internal storage, external USB storage devices (e.g. U disk), or SMB File Share. Saved setups
and reference waveforms can be recalled as needed.
For details of SMB File Share, refer to the section “SMB File Share”.

29.1 Save Type
SDS800X HD supports save types: Setup, Reference, Image (*.bmp/*.jpg/*.png), Waveform Data(binary/CSV/MatLab), and FileConverter Tool. It also supports saving the current setup as the default
setting. Here are brief descriptions of save types:
Setup
The default save type of the oscilloscope. The setup is saved with the *.xml file extension.
Reference
The reference waveform data are saved with the *.ref file extension. The saved file contains thereference waveform data and its setup information such as the vertical scale, vertical position, andtimebase.
BMP
Saves the screenshot in *.bmp format.
JPG
Saves the screenshot in *.jpg format.
PNG
Saves the screenshot in *.png format.
Binary Data
Saves the waveform data in binary (*.bin) format.
CSV Data
Saves the waveform data in ".csv" format. After selecting this type, you can touch the Para Switch
to determine whether to include the scope configuration parameter information (horizontal timebase,vertical scale, etc.) or not. Touch the Save All Channel to save all displayed waveforms on thescreen or select the Source to save. The available sources include C1 ~ C4, Z1 ~ Z4 and F1 ~ F4.
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Matlab Data
Saves the waveform data in *.mat or *.dat format which can be imported by Matlab directly. The
available sources include C1 ~ C4, Z1 ~ Z4 and F1 ~ F4(except for FFT).
To Default Key
The oscilloscope provides two options for the default setting. When the Default Type is set to “Factory”,
the factory default setting will be recalled by pressing theDefault

button on the front panel; When

the Default Type is set to “Current”, the last setting saved by the “To Default Key” operation will berecalled by pressing theDefault

button on the front panel.

FileConverter Tool
The mini tool is used to convert stored binary files to CSV format for viewing with a spreadsheet
program. This is ideal when collecting large datasets. For a waveform frame with deep memory suchas100 Mpts, saving directly as a CSV file will take a long time and will occupy a large amount ofmemory on a USB storage device. It’s recommended to save the data as a binary file and then convert
it to a CSV file on a computer.
The following table shows the relationship between the save types and save/recall operations.

Type

Save to External

Recall

Setup

√

√

Reference

√

√

BMP

√

×

JPG

√

×

PNG

√

×

Binary Data√×

CSV Data√

×

Matlab Data√

×

FileConverter

√

×

29.2

File Manager

The SDS800X HD's file manager has a similar style and operation to the Windows© operating
systems.

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SDS800X HD Series User ManualA.

Address bar

B.

Navigation panel

C.

File list

D.

ToolbarE.

File typeF.

Close the file manager
Table 29.1 Description of icons in the file manager

Icon

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Description

Icon

Description

Back

Forward

Up level

Root directory

Save

RecallSave asNew directory

New file

Paste

Copy

RenameDeleteMove

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29.3

Save and Recall Instances

Save the screenshot to the path “U-disk0\sds800xhd\” in the format of BMP

First, Insert the U disk.
Second, set the parameters of the Save operation:

Select Mode as "Save"

Select Type as "BMP"

Select the Image Style. "Normal" saves images with the samecolor of the display; "Inverted" saves images with a whitebackground color to save ink during printingSelect the Include Menu. "No" saves the grid area anddescriptor boxes; "Yes" saves the whole display

Select the Path Tips. "Hold" means that the prompt message
does not disappear; "Fade" means that the prompt message
disappears according to the set time; "None" means that the
prompt message is not displayed

Touch File Manager to open the file manager

Third, select the “\U-disk0\sds800xhd\” directory in the file manager:

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Fourth, touch Save As , click the pop-up text box to recall the virtual keyboard and input the file
name, and then touch OK :Once saved, the new BMP file is visible in the file manager:

In step 4, if Save is selected instead of Save As , the system saves the file as the default filename SDS8x4X_HD_BMP_n.bmp, where n is an integer incrementing from 1. The default save path
is \SIGLENT\.
Note: Touch Utility > Print to quickly saves a screenshot to the path where the last screenshot
is saved.
Note: A saved picture can be browsed on the oscilloscope by opening it in the File Manager.

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Recall the setup file "track.xml" stored in path “U-disk0\sds800xhd\”.
First, insert the U disk with the file "track.xml" stored folder “\sds800xhd\”.
Second, set the parameters of the Recall operation:

Select Mode as "Recall"Select Type as "Setup"Touch File Manager to open the file manager

Third, select the “\Udisk0\sds800xhd\” directory in the file manager, and then select the setup file"track.xml".

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Fourth, touch the Recall icon

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and wait for the oscilloscope to finish recalling the setup.

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30 Utility
30.1
OperateSystem Information
Utility

>

Menu

>

System Info

to check the system status. System information

includes the contents shown below.

30.2

System Setting

30.2.1

Language

The SDS800X HD supports multiple languages, including Simplified Chinese, Traditional Chinese,
English, French, Japanese, German, Spanish, Russian, Italian, Portuguese, and so on.
Operate Utility > Menu > System Settings > Language , and select the language in thelist.

30.2.2

Screen Saver

The screen saver will be activated if the oscilloscope has not been operated for a period. At this time
the backlight of the display is cut off to save power consumption.
Operate Utility > Menu > System Settings > Screen Saver to specify the period before
screen saver, or select “Off” to disable the screen saver.
Any action from the mouse, touch screen, or front panel can trigger to exit the screen saver.

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30.2.3BeeperFollow the steps

Utility

>

Menu

>

System Settings>

Beeperto enable or disable theAuto Power On

to set. See the chapter

audible buzzer.

30.2.4

Auto Power-on

OperateUtility

>

Menu

>

System Settings>“Power on” for details.

30.2.5Date/Time

The SDS800X HD does not have RTC clock, which can be synchronized through the NTP protocol
or manually set for Date/Time.
Operate Utility > Menu > System Setting > Date/Time to open the Date/Time dialog box:

Manual:Touch the Day, Month, Year, Hour, Minute and Second input fields, and use the pop-up virtual
keyboard to input a value.
Touch the modify Date/Time button to execute the settings.

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NTP:
Touch the Sever IP input fields, use the pop-up virtual keyboard to input the IP address, and thentouch theSync button.

Touch the text box of Time Zone to select the time zone.
Touch the Modify Time Zone button to perform the change.
Touch the Display Date / Time or not button to to select whether to display the Date/Time in thelower right corner of the device interface.
Touch Time Format to select a display time format of 12 hours or 24 hours.

30.2.6

Reference Position Setting

The reference position is used to set the strategy of scaling on the horizontal and vertical axes,
adapting to different requirements.
Operate Utility > Menu > System Setting > Reference Pos to open the dialog box, andchoose the strategy for the offset value change in the vertical (or horizontal) direction when the vertical(or horizontal) scale is changed.
Horizontal Ref
Fixed Delay: When the time base is changed, the horizontal delay value remains fixed. Asthe horizontal timebase scale is changed, the waveform expands/contracts around thecenter of the display
Fixed Position: When the time base is changed, the horizontal delay remains fixed to thegrid position on the display. As the horizontal time base scale is changed, the waveform
expands/contracts around the position of the horizontal display.
Vertical Ref


Fixed Offset: When the vertical scale is changed, the vertical offset remains fixed. As thevertical scale is changed, the waveform expands/contracts around the main X-axis of thedisplay

Fixed Position: When the vertical scale is changed, the vertical offset remains fixed to thegrid position on the display. As the vertical scale is changed, the waveform
expands/contracts around the position of the vertical ground position on the display.

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Take Horizontal Ref as an example to demonstrate the scaling effect of different settings:

Timebase = 10 ns/div, Horizontal Delay = -20 ns = - 2 div.

Fixed position, timebase is changed to 5 ns/div, the grid number of delay (2div) remains fixed,
while the horizontal delay changes to -10 ns.

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SDS800X HD Series User ManualFixed delay, timebase is changed to 5 ns/div, the horizontal delay value remains fixed, while thegrid number of delay changes to 4div.

30.3

Save Button

Push theSavebutton on the front panel to perform the specified save action. The default is tosave a screenshot as a picture (.bmp/.png/.jpg). Touch Utility > Save Button… to set the file
type and path.

A.

Select the save type: Screenshot or Save to…

B.

When the save type is “Save to”, set the save type referred
to in the chapter "Save/Recall".

30.4

Quick Action

Push theQuick Action

Quick Action

button on the front panel to perform a specified action. Touch Utility >to open the

Quick Action

menu and set the action mapping to the button. For

example, press the button to change the trigger source, or to turn color grading on. By default, Quick
Action is disabled, and pushing the button for the first time will open the Quick Action menu.

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A.

Enable/disable quick action. When disabled, pressing
Quick Action

B.

will have no response.

Set the category. When set as “Analysis”, the button can bepreset as an analysis function switch; When set as “Edgetrigger”, the button can be preset to change some trigger
parameters such as source and slope; When set as “Display”,
the button can be preset to change some display parameterssuch as color grade and persistence.

C.

Set the action of this button under the selected category.

30.5

LAN Setting

Operate the following steps to set the LAN port:
Perform Utility > Menu > I/O > LAN Config to open the LAN Config dialog box.

A.

Check

Automatic

to enable dynamic IP. In

this case, the oscilloscope must be connected to
the local area network with a DHCP server.
Contact your network administrator to confirm therelevant information.
B.

When

is not checked, the oscilloscope uses

static IP. Set the static IP address, subnet mask,
and gateway separately.
C.

If your network provides dynamic DNS, you canenable this option to have the oscilloscoperegister its host name and use a DNS server forname resolution.

D.

When

is not checked, please manually set

the DNS address.
E.

When accessing more than two SIGLENT
instruments through the web browser, it isnecessary to set a different VNC port number foreach instrument. The range is from 5900 to 5999.

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30.6

Install Options

The SDS800X HD provides a few options to enhance its functionality. Contact your local SIGLENT
sales representative or SIGLENT technical support to get the corresponding option key. Perform thefollowing steps to install the option:
Utility > Menu > Software Options

A.

Option information display area. When the option is not activated, the license type is displayed
as “Temporary” and can be tried up to 30 times.

B.

Select the option to install.

C.

The option key input area, touch or click the text box and enter the key by the virtual keyboard.

D.

Clear the characters in the key input area.

E.

After entering the option key, click Install to perform the installation.

F.

Use the U-disk to automatically install the option, the license must be stored in the root directoryof the U-disk.

30.7

Maintenance30.7.1

UpgradeThe firmware is upgradeable through external USB memory devices/U disk. Make sure the U disk
contains the correct upgrade file (*.ads) and is connected to the oscilloscope before performing the
upgrade.
Operate Utility > Menu > Maintenance > Upgrade to recall the upgrade dialog box:

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Click Browse to open the file manager, select the correct upgrade file and touch the Recall icon.

Click Upgrade in the upgrade dialog box to start the upgrade. The oscilloscope first copies the
upgrade file (*.ads) to the local memory and parses it. If the parse succeeds, it will show the following
dialog. Users can choose Cancel to cancel the upgrade or Reboot to restart the oscilloscope
immediately and continue the upgrade. Otherwise, the oscilloscope will restart automatically to finish
the upgrade.

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After the reboot, check if the version number is in "System Information".

Warning: Do not turn off the power during upgrading. Otherwise, the oscilloscope may
not boot up!

30.7.2

Self-Test

The Self-tests include screen, keyboard, and LED tests. It is used to check whether the oscilloscope
has any electrical or mechanical problems with the user interface such as color distortion, and thesensitivity of buttons and knobs.
Screen Test
The screen test is used to find out whether the oscilloscope display has serious color distortion, badpixels, or screen scratches.
Perform

Utility

>

Menu

>

Maintenance>Self Test>

Screen Test

, and theoscilloscope will enter the screen test interface as shown below. The screen displays in red at first.

Press the "Single" button to switch to green and blue display mode. Observe whether there is any
color distortion, bad pixels, or scratches on the screen. Press the "Run/Stop" button to exit the screen
test mode.

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Keyboard Test
The keyboard test is used to check whether the oscilloscope front panel buttons or knobs are
responsive or sensitive.
Perform

Utility

>

Menu

>

Maintenance>Self Test>

Keyboard Test

to recall thefollowing interface:Knob test: Turn each knob clockwise, counter-clockwise, and press down.

Observewhether the value on the corresponding knob (default 0) on the screen increases ordecreases in real-time and whether the knob lights up when it is pressed.



Button test: Press each button and check whether the corresponding button icon on thescreen lights up in real-time.

Press the "Run/Stop" button three times to exit the keyboard test.
LED Test
The LED test is used to check whether the button backlight on the front panel is functional.
Operate Utility > Menu > Maintenance > Self Test > LED Test to recall the followinginterface:224

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Press the “Single” button and the first LED on the front panel will light. The corresponding position of
the key on the screen will also change color. Press the “Single” button to check the next button. Press
the “Single” button consecutively until all the backlights are tested. Press the "Run/Stop" button to exit
the LED test.

30.7.3Self-Calibration

The self-calibration program can quickly calibrate the oscilloscope to reach the best working state
and the most precise measurement. It is recommended to perform a self-calibration if the change of
ambient temperature is more than 5 ℃.
Note: Make sure the oscilloscope has been warmed up or operated for more than 30 minutes before
the self-calibration.
Please do the self-calibration as follows:
1.

Disconnect everything from all inputs.

2.

Operate Utility > Menu > Maintenance > Self Calibration , and the following dialog
box appears. Select Continue to start the self-cal program.

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SDS800X HD Series User Manual3.

The oscilloscope will not respond to any operation until the self-cal is finished. After the self-cal
is completed, touch the screen or press any button to exit.

Quick Cal
When Quick Cal is enabled, the oscilloscope will initiate an ADC calibration procedure when the ADC
temperature changes by over 3 ℃ to avoid performance drift. This procedure is quick enough not toaffect the user experience but will interrupt the acquisition procedure. It is recommended to disable it
when capturing long-duration waveforms or monitoring rare events without interruption. The default
status of Quick Cal is disabled.
Changing vertical scale or channel interleaving mode will initiate the same ADC calibration procedurein the background. This is always enabled, regardless of the status of Quick Cal.
Touch Utility > Menu > Maintenance > Quick Cal to set Quick Cal.

30.7.4Developer Options

This function is used for internal development by SIGLENT.

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30.8

Service30.8.1SMB File Share

Perform

Utility

>

Menu

>

Service>

SMB File Share>Clientto open the SMB File

Share dialog box:

A.

Select drive. The default is I:

B.

Check to automatically connect to the network directory at every power onC.

Input the SMB File Share directory in the text box

D.

Check “Remember” to remember the path

E.

Username and password. Check “Remember” to save themF.

Check “Anonymous” to access the network directory in guest mode (Username: Guest, no
password). This needs the server to permit anonymous access

G.

Connect or disconnect to the network directory manually

30.8.2Web Server

The SDS800X HD includes a web server function, you can access and control the oscilloscope using
a web browser. See the section "Web Browser" for details about remote control operation.
Perform Utility > Menu > Service > Web to set the password to control the instrument.
The password length is limited to 20 bytes.

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30.8.3

LXI

This oscilloscope complies with LXI version 1.5, defined in LXI device specification 2016, which canbe used to quickly build automated test systems.
Click LXI to recall the LXI status box as below:

Click LAN Reset to restore the LAN defaults to your oscilloscope. It will enable automatic IP, ICMP
Ping responder, and Multicast DNS, and reset the webserver password which is set in
Utility > Menu > Service > Web .
After setting the LAN, the LXI welcome page can be loaded through the browser, refer to the section“LAN Setting” and “Web Browser” for details. When starting instrument identification in the web server,
the LXI image in the upper right corner will flash continuously.

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31 Remote Control
The SDS800X HD provides a LAN port and a USB Device port which can be used for remote control
in multiple ways.

31.1

Web Browser

A built-in web server provides an approach to interact with the oscilloscope by a web browser. It
doesn’t require any additional software to be installed on the computer. Set the LAN port correctly(see section “LAN Setting” for details), input the IP address of the oscilloscope in the browser addressbar, and then the user can browse and control the oscilloscope on the web.

A.

Input the IP address of the instrument

B.

Instrument information

C.

Click here to recall the instrument control interface

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Below is the instrument control interface:A.

Display and control area of the instrument. The display in this area is a copy of the instrument
display. Using the mouse to operate in the area is equivalent to directly operating the touch
screen display of the instrument.

B.

Click here to perform a screenshot.

C.

Click here to save the waveform data as a bin file and download it to the local computer.

D.

Click here to save the waveform data as a CSV file and download it to the local computer.

E.

Click here to download the mini-tool for converting binary files to CSV.

F.

Click here to perform a firmware upgrade.

31.2

Other Connectivity

The SDS800X HD also supports remote control of the instrument by sending SCPI commands via NIVISA, Telnet, or Socket. For more information, refer to the programming guide for this product.

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32 Troubleshooting
The commonly encountered failures and their solutions are listed below. When you encounter those
problems, please solve them using the corresponding steps. If the problem remains, please contact
SIGLENT as soon as possible.

1.

The screen is still dark (no display) after power on:
1)

Check whether the power is correctly connected.

2)

Check whether the power switch is on.

3)

Check whether the fuse is burned out. If the fuse needs to be changed, please contact
SIGLENT timely and return the instrument to the factory for replacement by the maintenancepersonnel authorized by SIGLENT.

2.

4)

Restart the instrument after finishing the above inspections.

5)

If it still does not work correctly, please contact SIGLENT.

The signal is sampled but no waveform of the signal is displayed:
1)

Check whether the probe is correctly connected to the signal connecting wire.

2)

Check whether the signal connecting wire is correctly connected to the BNC (namely
channel connector).

3.

3)

Check whether the probe is correctly connected to the item to be tested.

4)

Check whether there are signals generated from the item to be tested.

5)

Resample the signal.

The tested voltage amplitude is greater or lower than the actual value (Note that this problem
usually occurs when the probe is used):1)

Check whether the attenuation coefficient of the channel complies with the attenuation ratioof the physical probe.

2)

4.

Disconnect the oscilloscope from the external signal and do a self-cal.

There is a waveform display but not stable:
1)

Check the trigger signal source: check whether the source item at the trigger panel complies
with the signal channel used.

2)

Check whether it is a "false wave”: when the signal frequency is very large (more than half

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SDS800X HD Series User Manualof the sample rate), it is easy to appear as a "false wave". At this point, a small time baseshould be set to make the sample rate more than 2 times the signal frequency.
3)

Check the trigger type: general signals should use the “Edge” trigger and video signals
should use the “Video” trigger. Only when the proper trigger type is used, can the waveform
be displayed stably.

4)

5.

Change the trigger holdoff setting.

No display after pressing

Run/Stop:

Check whether the mode at the trigger panel (TRIGGER) is on “Normal” or “Single” and whether
the trigger level exceeds the waveform range. If yes, set the trigger level to the middle or set themode to “Auto”.
Note: Using

6.

Auto

could automatically finish the above setting.

The touch screen does not respond to touch operation:
1)

Check whether the

Touchbutton backlight on the front panel is lighted up. If not, thetouch screen is not turned on. Press the button to enable the touch screen
2)

7.

Restart the instrument.

The USB storage device cannot be recognized:
1)

Check whether the USB storage device can work normally.

2)

Make sure whether the USB interface can work normally.

3)

Make sure that the USB storage device being used is flash storage type. This oscilloscope
does not support hardware storage type.

232

4)

Restart the instrument and then insert the USB storage device to check it.

5)

If the USB storage device still cannot be used normally, please contact SIGLENT.

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About SIGLENTSIGLENT is an international high-tech company, concentrating on R&D, sales,
production and services of electronic test & measurement instruments.
SIGLENT first began developing digital oscilloscopes independently in 2002.
After more than a decade of continuous development, SIGLENT has extended
its product line to include digital oscilloscopes, isolated handheld

oscilloscopes,

function/arbitrary

waveform

generators,

RF/MWsignalgenerators, spectrum analyzers, vector network analyzers, digital multimeters,
DC power supplies, electronic loads and other general purpose test
instrumentation. Since its first oscilloscope was launched in 2005, SIGLENT
has become the fastest growing manufacturer of digital oscilloscopes. We
firmly believe that today SIGLENT is the best value in electronic test &measurement.

Headquarters:
SIGLENT Technologies Co., Ltd
Add: Bldg No.4 & No.5, Antongda Industrial
Zone, 3rd Liuxian Road, Bao'an District,
Shenzhen, 518101, China
Tel: + 86 755 3688 7876
Fax: + 86 755 3359 1582
Email: sales@siglent.com
Website: int.siglent.com

North America:
SIGLENT Technologies America, Inc
6557 Cochran Rd Solon, Ohio 44139
Tel: 440-398-5800
Toll Free: 877-515-5551

Fax: 440-399-1211
Email: info@siglentna.com
Website: www.siglentna.com

Europe:Follow us on
Facebook: SiglentTech

SIGLENT Technologies Germany GmbH
Add: Staetzlinger Str. 70
86165 Augsburg, Germany
Tel: +49(0)-821-666 0 111 0
Fax: +49(0)-821-666 0 111 22
Email: info-eu@siglent.com
Website: www.siglenteu.com

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