SDG7000A Series
Arbitrary Waveform
Generator
Service Manual
EN01A

SDG7000A Service Manual

Copyright and Declaration
Copyright
SIGLENT TECHNOLOGIES CO., LTD. All Rights Reserved.

Trademark Information
SIGLENT is the registered trademark of SIGLENT TECHNOLOGIES CO., LTD.

Declaration
SIGLENT products are protected by patent law in and outside of P.R.C.
SIGLENT reserves the right to modify or change parts of or all the specifications or pricing policies atcompany’s sole decision.
Information in this publication replaces all previously corresponding material.
Any way of copying, extracting or translating the contents of this manual is not allowed without thepermission of SIGLENT.

Product Certification
SIGLENT guarantees this product conforms to the national and industrial stands in China and otherinternational stands conformance certification is in progress.

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SDG7000A Service Manual

CONTENT1

INTRODUCTION.................................................................................................................................. 4

2

IMPORTANT SAFETY INFORMATION............................................................................................... 63

2.1

GENERAL SAFETY SUMMARY ............................................................................................................ 6

2.2

SAFETY TERMS AND SYMBOLS .......................................................................................................... 8

THE SDG7000A SERIES GENERATOR AT A GLANCE.................................................................... 9
3.1

CHARACTERISTICS ........................................................................................................................... 9

3.2

THE FRONT PANEL AT A GLANCE ..................................................................................................... 10

3.2.1

3.3
4

5

6

THE REAR PANEL AT A GLANCE ....................................................................................................... 13

PERFORMANCE VERIFICATION ..................................................................................................... 14
4.1

DC OUTPUT VERIFICATION ............................................................................................................. 14

4.2

AC AMPLITUDE VERIFICATION ......................................................................................................... 16

4.3

FREQUENCY RESPONSE VERIFICATION ........................................................................................... 18

4.4

FREQUENCY ACCURACY VERIFICATION............................................................................................ 21

ASSEMBLY PROCEDURES ............................................................................................................. 22
5.1

SECURITY CONSIDERATION............................................................................................................. 22

5.2

LIST OF MODULES .......................................................................................................................... 23

5.3

REQUIRED TOOLS .......................................................................................................................... 23

5.4

DISASSEMBLY PROCEDURES .......................................................................................................... 24

5.4.1

Disassemble the Metal Shell ............................................................................................................... 24

5.4.2

Disassemble the Channel Board ......................................................................................................... 25

5.4.3

Disassemble the Main Board............................................................................................................... 26

5.4.4

Disassemble the Front Cabinet ........................................................................................................... 27

TROUBLESHOOTING....................................................................................................................... 28
6.1

ESD PRECAUTIONS ......................................................................................................................... 28

6.2

REQUIRED EQUIPMENTS .................................................................................................................. 28

6.3

CPU CARD DRAWING ...................................................................................................................... 29

6.4

MAIN BOARD DRAWING .................................................................................................................... 30

6.5

CHANNEL BOARD DRAWING .............................................................................................................. 31

6.6

CHECK THE POWER SUPPLY ............................................................................................................. 32

6.7

CHECK THE CPU CARD ................................................................................................................... 33

6.7.1

Voltage Checking ................................................................................................................................ 33

6.7.2

ARM CPU System Checking ............................................................................................................... 33

6.8

2

Touch Screen Display ......................................................................................................................... 11

CHECK THE MAIN BOARD ................................................................................................................. 34

6.8.1

Voltage Checking ................................................................................................................................ 34

6.8.2

10 MHz Clock Source and PLL Lock Status Checking ........................................................................ 35

6.8.3

FPGA Checking................................................................................................................................... 35

6.8.4

Connector Checking ............................................................................................................................ 35

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6.9

CHECK THE CHANNEL BOARD ........................................................................................................... 36

6.9.1

Voltage Checking ................................................................................................................................ 36

6.9.2

Connector Checking ............................................................................................................................ 37

6.10 QUICK GUIDE FOR GENERAL FAILURES .............................................................................................. 38
7

MAINTENANCE ................................................................................................................................. 39
7.1

MAINTAIN SUMMARY ........................................................................................................................ 39

7.2

REPACKAGING FOR SHIPMENT .......................................................................................................... 39

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SDG7000A Service Manual

1

Introduction

Overview of this Document
This document is for the SDG7000A series arbitrary waveform generator, which will be mostly referred
to as “the generator” for short in the following text. The main contents described in this manual are:

The SDG7000A Series Generator at a GlanceThis section introduces the main technology characteristics for the SDG7000A generator.

The Front Panel at a GlanceThis section introduces briefly all of the buttons and the knob on the front panel.

The Rear Panel at a GlanceThis section introduces the ports for easy communication on the rear panel.

Specification
Chapter 1 lists the generator’s specifications.

Quick Start
Chapter 2 describes how to prepare the generator for use and helps to familiarize you with a few of
its front-panel features.
Calibration
Chapter 3 provides calibration, verification and adjustment procedures for the generator.

Assembly Procedures
Chapter 4 provides disassembly procedures to help in gaining an understanding of the structure of
the generator in preparing to install or replace any needed modules or troubleshoot faults that might
be encountered during operation.

Troubleshooting
Chapter 5 provides troubleshooting procedures for the internal circuit boards, as well a quick guidefor solving general problems. Before any operation, please read the ESD Precautions to avoid
personal injuries or damage to the generator.

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SDG7000A Service Manual

Maintenance
Chapter 6 provides information on maintenance, daily care and inspection of the instrument. The
contact information is included at the end of the chapter in case of some unsolvable problems thatmight be encountered.

The Different SDG7000A Models Addressed by this Manual
All the description for function and performance in this document are according to the SDG7102A
generator, and apply to all generators in this series. The SDG7000A series contains the following
types:The series includes the following models:Model

Analogy Bandwidth

Maximum Sample Rate

Analog Channel

SDG7102A

1 GHz

5 GSa/s

2

SDG7052A

500 MHz

5 GSa/s

2

SDG7032A

350 MHz

5 GSa/s2

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SDG7000A Service 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 Injure.

Use Proper Power Line.
Use only the special power line approved by the state and local authorities.

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.
In the event of an device failure, please do not dismantle the machine for maintenance. The device
contains capacitors, power supply, transformers and other energy storage devices which may cause
high voltage damage. The internal devices of the device are sensitive to static electricity and directcontact can easily cause irreparable damage to the device. It is necessary to return to the factory or

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SDG7000A Service Manual

to the company's designated maintenance organization for maintenance. Be sure to pull out the power
cord before repairing the device. Live line operation is strictly prohibited. The device can only be
powered on when the maintenance is completed and the maintenance is confirmed to be successful.

Identification of Normal State of Equipment.
After the device 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 button,
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 setting. If the fault information is still in place, do not use it for
testing. Contact the manufacturer or the maintenance department designated by the manufacturer tocarry out maintenance to avoid the wrong test data caused by the use of the fault or endanger the
personal safety.

Do Not Operate with Suspected Failures.
If you suspect that there is damage to the instrument, please let only qualified service personnel checkit.

Avoid Exposed Circuits, Wire, or Components.
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 lithium batteries with the same specification could be used to replace the battery on the
main-board.

The responsible body or operator should refer to the instruction manual to preserve theprotection afforded by the device. If the device is used in a manner not specified by the
manufacturer, the protection provided by the device 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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SDG7000A Service 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 instrument’s state switches between Operation and Standby. This switch
does not disconnect the device's power supply. To completely power off the
instrument, the power cord must be unplugged from the AC socket after the
instrument is in the standby state.
This symbol is used to represent alternating current, or "AC".

8

CAUTION

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

WARNING

The "WARNING" symbol indicates a potential hazard. It calls attention to aprocedure, practice, or condition which, 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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SDG7000A Service Manual

3

The SDG7000A Series Generator at a Glance

SIGLENT’s SDG7000A is a series of dual-channel Arbitrary Waveform Generators that feature up to
1 GHz maximum bandwidth, maximum sample rate of 5 GSa/s and 14-bit vertical resolution. They
also include proprietary TrueArb and EasyPulse technology that helps to solve the weaknesses
inherent in traditional DDS generators when generating arbitrary, square and pulse waveforms. The
SDG7000A can generator Sequence waveform, it supports up to 1024 segments. The SDG7000A is
a multi-function device which can generate Noise, IQ signals and PRBS patterns. The IQ modulation
bandwidth up to 625 MHz. In addition, The SDG7000A provides a 16bit digital bus output. Thesefeatures enable the SDG7000A to provide a variety of high fidelity and low jitter signals, meeting thegrowing requirements of complex waveform synthesis.

3.1

Characteristics



Dual channel differential/single-ended output，16-bit LVDS/LVTTL digital bus output.

High-performance sampling system with 5GSa/s sample rate and 14 -bit vertical resolution.



1 GHz maximum bandwidth.

Supports arbitrary waveform with sample rate of 0.01 Sa/s ~ 2.5 GSa/s, with maximum memory
depth of 512 Mpts, and provides segment editing /playback functions.

Supports vector signals with up to 500 MS/s symbol rate.

Supports low jitter pulse with 1 ns minimum pulse width and 500ps minimum edge.

Up to 1 GHz bandwidth White Gaussian Noise and the bandwidth is adjustable.

Supports PRBS up to 312.5 Mbps.



The digital bus can output digital signals up to 1 Gbps.

Supports analog/digital modulation, sweeping and bursting.

Enhanced dual channel operation functions: inter channel tracking, coupling and copying; Dualchannel superposition function; Supports mutual modulation between channels.



The 24 Vpp analog output is superimposed with ± 12 Vdc offset to provide a maximum output
range of ± 24 V (48 V).

High precision Frequency Counter

5-inch capacitive touch screen with resolution of 800x480; Supports external mouse andkeyboard operation; Supports WebServer to remote control the instruments.

Supports multiple interfaces: 10MHz In, 10MHz Out, Trigger In/Out, Markers etc.

Supports SCPI command for various automatic integration test systems remote controlling

Note: All the specifications described in this manual refer to the SDG7102A.

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SDG7000A Service Manual

3.2

10

The Front Panel at a Glancewww.siglent.com

SDG7000A Service Manual

3.2.1

Touch Screen Display

Home Page

Carrier Setting Boxes set and display parameters of the carrier. Click to enter the carrier
setting page.
Modulation/Sweep/Burst Setting Boxes set and display parametersmodulation/sweep/burst. Click to enter the modulation/sweep/burst setting page.

of

Waveform Combine Setting provides schematic diagram and setting of two channel
combine. Click the switches in the area to switch between channel output alone andchannel output after combination.
Channel Output Setting Boxes set and display output parameters. Click to switch
between On/Off.
Toolbar provides shortcuts to common functions.
Status Bar Displays information such as network connection status, clock status, phasemode and time/date.

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SDG7000A Service Manual

Parameter Setting Page

Channel Tab Click the tab corresponding to the channel to switch to the parameter setting
page of the channel.
Waveform Preview Displays the preview of waveform.
Parameter Setting Box The parameter name is on the left. If the parameter name isfollowed by an icon

，it indicates that the parameter has alternative parameters, suchas "Frequency" can be switched to "Period". Click here to switch the parameter.
The parameter value is on the right. If the value has a unit, the unit will be displayed. Clickthe parameter value area to set the value through the virtual keyboard or front panel
keyboard.
If the parameter value or unit is followed by an icon

，it means that there are multiple

options (for example, the unit of sine wave amplitude can be set to "Vpp", "Vrms" or"dBm"), click the icon to select.
If the parameter value area is a switch icon

，it means that the parameter has only

"ON" and "OFF" states. Click the icon to switch.
If the parameter value is followed by an icon

，it indicates that there are moredetailed parameter settings. Click the icon to enter the corresponding next level
page.
Go to the Homepage
Status Bar Displays information such as network connection status, clock status, phasemode and time/date.

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SDG7000A Service Manual

Description of Icons in the Status Bar

The network is connected. Click this icon to quickly set the LAN.
No network connection. Click this icon to quickly set the LAN.
USB storage device detected.
The clock source is internal. Click this icon to quickly set the clock source.
The clock source is external. Click this icon to quickly set the clock source.
The clock source is external, but no valid external clock was detected.
Click this icon to quickly set the clock source.
The phase mode is "Locked". Click this icon to quickly set the phase mode.
The phase mode is "Independent". Click this icon to quickly set the phase mode.
Time/date. Click this area to quickly set the time/date.

3.3

The Rear Panel at a Glance

WARNING: For protection from electric shock, the grounding power cord must not be defeated. If
only a two-contact electrical outlet is available, connect the instrument’s chassis ground screw (seeabove) to a good earth ground.

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SDG7000A Service Manual

4

Performance Verification

The performance verification tests are recommended as acceptance tests upon receipt of the
instrument. The acceptance test results should be compared to the specifications given in datasheet.
After acceptance, repeat the performance verification tests within every calibration interval.

If the instrument fails performance verification, adjustment or repair is required.

4.1

DC Output Verification

This test checks if the DC offset listed in the table below is within the spec range using a DMM.

1.

Set the DMM to measure DC voltage. Connect the DMM to the CH1 output of thegenerator as shown below.

2.

Set CH1 format to single-ended and set the Load to HiZ.

3.

Turn on CH1 and select the DC waveform.

4.

Set the instrument to each output value described in the table below and measure theoutput voltage with the DMM. Be sure the generator output load is set to High–Z andthe output is enabled.

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SDG7000A Service Manual

DC Offset

CH1

CH2

Spec Range± (1%+2 mV)

5.

0 mV

-2 mV ~ 2 mV

10 mV

7.9 mV ~ 12.1 mV

100 mV

97 mV ~ 103 mV

1V

0.988 V ~ 1.012 V

3V

2.968 V ~ 3.032 V

10 V

9.898 V ~ 10.102 V-10 mV-12.1 mV ~ - 7.9 mV-100 mV-103 mV ~ -97 mV-1 V-1.012 V ~ -0.988 V-3 V-3.032 V ~ -2.968 V-10 V

10.102 V ~ -9.898 V

Remove the BNC cable and connect it to the output of CH2, then perform the same
verification as CH1.

6.

Compare the measured voltage to the spec range shown in the table above.

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SDG7000A Service Manual

4.2

AC Amplitude Verification

This test checks the ac amplitude output accuracy at the frequency of 10 kHz using a DMM.

1.

Turn on the generator and choose CH1 as the operating channel.

2.

Connect the DMM and generator as shown below.

3.

Set CH1 format to single-ended and set the Load to HiZ.

4.

Select a 10 kHz Sine waveform of the generator and set offset to 0V.

5.

Set the amplitude to the values listed below in sequence.

Amplitude
(Vpp)

6.

16

CH1

CH2

Spec Range

(Vpp)

(Vpp)

± (1% +2 mVpp)

98.908~9.902

6.5

6.433~6.567

4

3.958~4.042

1.3

1.285~1.315

0.4

0.394~0.406

0.13

0.1267~0.1333

0.04

0.0376~0.0424

0.013

0.01087~0.01513

Set offset to 3.5V and Set the amplitude to the values listed below in sequence.

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SDG7000A Service Manual

Amplitude
(Vpp)

CH1

CH2

Spec Range

(Vpp)

(Vpp)

± (1% +2 mVpp)

98.908~9.902

4

3.958~4.042

1

0.988~1.012

0.4

0.394~0.406

0.13

0.1267~0.1333

0.04

0.0376~0.0424

7.

Set CH1 format to differential set the Load to HiZ.

8.

Set offset to 0V and set the amplitude to the values listed below in sequence.

Amplitude
(Vpp)

CH1

CH2

Spec Range

(Vpp)

(Vpp)

± (1% +2 mVpp)

1

0.988~1.012

0.45

0.4435~0.4565

0.15

0.1465~0.1535

0.1

0.097~0.103

0.032

0.02968~0.03432

Note: the value measured from the DMM need to be multiplied by 2.

9.

Remove the BNC cable and connect it to the output of CH2, then perform the same
verification as CH1.

10.

Compare the value measured from the DMM to the spec range shown in the table above.

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SDG7000A Service Manual

4.3

Frequency Response Verification

This test checks if the amplitude flatness is within the spec range using a Power Meter.

1.

Turn on the generator and choose CH1 as the operating channel. Set the Load to 50 Ω.

2.

Connect the Power Meter, PC and generator as shown below.

3.

Set CH1 format to single-ended.

4.

Set offset to 0V and the output load to 50 Ω.

5.

Select Sine waveform of the generator and set the amplitude to 0.45 Vpp and frequency
to the values listed below in sequence.

Frequency

1 MHz

18

CH1
(dBm)
PCH1_1M

CH1

CH2Spec Range (dBm)

CH2
(dBm)

Spec Range (dBm)-3.2564~-2.6564

PCH2_1M-3.2564~-2.6564

5 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

10 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

50 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

100 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

150 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

200 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

250 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

300 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

350 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

400 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

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SDG7000A Service Manual

450 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

500 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

550 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

600 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

650 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

700 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

750 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

800 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

850 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

900 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

950 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.31000 MHz

PCH1_1M ± 0.3

PCH2_1M ± 0.3

6.

Set CH1 format to differential and terminate the "-" port with 50 Ω load. Be sure thegenerator output load is set to 100 Ω.

7.

Set the amplitude to 0.45 Vpp and frequency to the values listed below in sequence.

Frequency

1 MHz

CH1
(dBm)
PCH1_1M_dif

CH1

CH2

Spec Range (dBm)

CH2
(dBm)

Spec Range (dBm)-6.2667~-5.6667

PCH2_1M_dif-6.2667~-5.6667

5 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

10 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

50 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

100 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

150 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

200 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

250 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

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SDG7000A Service Manual

300 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

350 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

400 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

450 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

500 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

550 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

600 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

650 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

700 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

750 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

800 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

850 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

900 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

950 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.31000 MHz

PCH1_1M_dif ± 0.3

PCH2_1M_dif ± 0.3

Note: the value measured from the Power Meter need to be added by 3.0103dBm.
8.

Remove the BNC cable and connect it to the output of CH2, then perform the same
verification as CH1.

9.

Compare the value measured from Power Meter to the spec range shown in the table
above.

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4.4

Frequency Accuracy Verification

This test checks if the frequency accuracy is within the spec range using a frequency counter.

1.

Set the Frequency Counter to measure frequency. Connect the Counter to the CH1
output of the generator as shown below.

2.

Power up the frequency counter and the generator for 30 minutes.

3.

Set CH1 format to single-ended and set the Load to HiZ.

4.

Select Sine waveform of the generator and set the amplitude to 3 Vpp.

5.

Set the frequency to 10 MHz and turn on CH1.

6.

Compare the value measured from the counter to the spec range shown in the table below.

Time Base TypeStandard time baseFrequency

Spec Range

(Hz)

(Hz)
9999990 ~ 10000010, if 18 ℃≤theambient temperature ≤ 28 ℃; else
9999980 ~ 10000020

OCXO optionwww.siglent.com

9999999 ~ 10000001

21SDG7000A Service Manual

5

Assembly ProceduresThis chapter describes how to remove the major modules from the SDG7000A series generator. To
install the removed modules or replace new modules, please follow corresponding operating steps inreverse order.

The following subjects are addressed in this chapter:Security Consideration which describes security information needed to consider while
operating.



List of Modules in which the modules to remove are listed.



Required Tools which describes the tools needed to perform the procedures.

Disassembly Procedures which describes in detail how to remove and install the modules.

5.1

Security Consideration

Only qualified personnel should perform the disassembly procedures. Whenever possible, disconnect
the power supply before removing or replacing modules. Otherwise, personal injuries or damages tothe components may occur.
Avoid Electric Shock Hazardous voltages exist on the LCD module and power supply module. To
avoid electrical shock, disconnect the power cord from the generator, and then wait at least threeminutes for the capacitors in the generator to discharge before beginning the disassembly.
Preventing ESD Almost all electrical components can be damaged by electrostatic discharge (ESD)
during handling. Component damages can occur at electrostatic discharge voltages as low as 50
volts. The following guidelines will help preventing ESD damage when servicing the instrument or any
electronic device.
Disassemble instruments only in a static-free work area.

Use a conductive work area to reduce static charges.



Use a conductive wrist strap to reduce static charge accumulation.



Minimize handling.



Keep replacement parts in original static-free packaging.



Remove all plastic, foam, vinyl, paper and other static-generating materials from the immediate
work area.

22

Use only anti-static solder suckers.

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5.2

List of Modules

The following removable modules are listed in the order of performing disassembly procedures.

5.3

Number of Module

Module1

Metal Shell

2

Channel Board

3

Main Board

4

Front Cabinet

Required Tools

Use these tools to remove or replace the modules in the generator:Antistatic gloves

T10 and T15 Torx socket head screwdriver, pointed nose pliers

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SDG7000A Service Manual

5.4

Disassembly ProceduresThis section describes in detail how to disassemble the generator’s modules listed above. If you needto install or replace the part module, follow the reverse steps.

5.4.1

Disassemble the Metal Shell

Figure 5-1 Disassemble the Metal Shell
Disassemble according to the following steps:
1.

Remove 4 PCS PM4 * 8 screws from the rear foot pad and remove the rear foot pad.

2.

Remove 2 PCS KM4 * 16 screws of the handle and remove the handle.

3.

Remove 2 PCS KM3 * 6 screws of the shell and remove the shell upward.

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5.4.2

Disassemble the Channel Board

Figure 5-2 Disassemble the Channel Board

Disassemble according to the following steps:
1.

Pull out the cable plug from ① to ⑪ as shown in the figure above.

2.

Remove 6 PCS screws fixing the channel board.

3.

Remove the channel board.

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SDG7000A Service Manual

5.4.3

Disassemble the Main Board

Figure 5-3 Disassemble the Main Board

Disassemble according to the following steps:
1.

Pull out the cable plug from ⑫ to ⑳ as shown in the figure above.

2.

Remove 18 PCS PM3 * 6 screws and take out the cooling air duct, support frame and PCBA in
turn.

3.

Remove 4 PCS PM3 * 6 screws of the power module and take out the power module.

4.

Remove 2 PCS PM3 * 6 screws fixing OCXO module and pull out the OCXO module backward.

5.

Remove the main board

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5.4.4

Disassemble the Front Cabinet

Figure 5-4 Disassemble the Front Cabinet

Disassemble according to the following steps:
1.

Remove the 8 PCS PM4 * 8 screws of the front foot pad and take out the front foot pad.

2.

Remove 4 PCS PM4 * 8 screws from the front cabinet and separate the front cabinet assemblyfrom the frame.

3.

Remove the connecting cable 21 and 22, and remove plastic knob;

4.

Remove 13 PCS PM3 * 8 screws of key board.

5.

Take out the key board and silicone keys in turn.

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SDG7000A Service Manual

6

Troubleshooting

The internal structure of the generator consists of the CPU card, main board, channel board, key and
LCD board, USB interface board, power module, OCXO module, and fans. They are linked throughcables or connectors. This chapter explains the main troubleshooting procedures for these boards(mainly main board, channel board, and CPU card) by measuring the corresponding test points andchecking the signals of connectors on them, thus to help in determining the cause of the failure thathas been encountered while operating the SDG7000A.

6.1

ESD Precautions

While performing any internal test of the generator, please refer to the following precautions to avoid
damages to its internal modules or components resulting from ESD.


Handle circuit boards by their edges as much as possible.



Avoid handling of static-sensitive modules if not necessary.

Wear a grounded antistatic wrist strap to drain the static voltage from your body while touchingthese modules.



Operate static-sensitive modules only in static-free areas. Avoid handling modules in areas thatallow anything capable of generating or holding a static charge.

6.2

Required Equipments

The equipment listed in the table below is required to troubleshoot the generator.

Table 6-1 Required Equipments

28

Equipment

Critical Specifications

ExampleDigital Multimeter

DC Accuracy ±0.015%

SDM3055

Oscilloscope

300 MHz Bandwidth

SDS2304X

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SDG7000A Service Manual

6.3

CPU Card Drawing

The CPU card is the control center of the generator that contains an ARM CPU system. It completes
the GUI function, controlling and configuration function of the main board and the channel board aswell as the user interface. It is plugged into the SODIMM socket of the main board. Please refer tothe following drawing to quickly locate the test points on the main board for easy resolution of any
problems encountered.

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SDG7000A Service Manual

6.4

Main Board Drawing

The main board is responsible for signal processing. It is mainly responsible for generating analog
signal, clock, input and output interface signal and other functions. Please refer to the following
drawing to quickly locate the test points on the main board for easy resolution of any problems
encountered.

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6.5

Channel Board Drawing

The channel board is a signal conditioning board. It mainly deals with the adjusting of signal
parameters such as amplitude, offset, and so on. Please refer to the following drawing to quickly
locate the test points on the channel board for easy resolution of any problems encountered.

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SDG7000A Service Manual

6.6

Check the Power Supply

Before performing the power supply testing procedure, please make sure that the generator isgrounded correctly through the protective lead of the power cord. Take care not to touch or evendisassemble the power supply module without any safety precautions to avoid electric shock. Hereare procedures for testing the power supply:
1.

Disconnect the power cord of the generator and then check whether the fuse is good. The fuseis under the AC inlet.

2.

Connect the power cord and then turn on the generator. Focus on the Power Connector (J25) on
main board, which contains 4 pins, from Pin 1 to Pin 4. Pin 1 and Pin 2 are +12V, and connected
to red wires. Pin 3 and Pin 4 are ground, and connected to black wires. Check whether the voltage
value is within the corresponding specified range by digital multimeter. The voltage range is
12V±10%.

3.

If the voltage value is within the specified range, then the power module is working normally.
Otherwise, please go to step 4.

4.

Disconnect the power connector and re-check the voltage on the wires side. Some abnormalityof the load is most likely causing the power supply problem. Continuous checking or evenreplacing the channel/main board is required for further test.
If the voltage value is out of the specified range, then the power module appears to be
problematic and a replacement will be required. For safety, please use qualified technicalpersonnel to disassemble the power module.

Note: The fuse under AC inlet provides protect against the danger of fire in the event of a failureof the power supply circuitry. However, this fuse will not fail ("open" or "blow") in normal power
supply operation except when a significant overload occurs.

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6.7

Check the CPU Card

The CPU card is the control center of the generator where an Arm CPU is located. Please refer tochapter 8 if you wish to separate it from the main board.

6.7.1

Voltage Checking

Test the voltage test points on the CPU card and compare to the table below. If each tested voltage
value is within the corresponding specified range, then the CPU card is working normally. If thevoltages are out of the specified range, please return it to the factory for repair or contact SIGLENT.
Table 6-2 Test Voltages of the CPU card

6.7.2

Test point

Voltage value

Error limit

VCC1V

1V

±5%

VCC1V8

1.8 V±5%VCC1V5

1.5 V±5%VCC3V3

3.3 V±5%ARM CPU System Checking

Observe the LED lights on the CPU card, which indicate the working state of the ARM CPU system.
If the LED lights blink at a regular rate, then the corresponding codes have been loaded successfully
and the chip is in an operating state. Otherwise, there may be a problem.

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SDG7000A Service Manual

6.8

Check the Main Board

If it is desired to remove the main board from the metal shelf inside the generator, please place it ona clean, insulated mat. Here are the procedures for testing the main board:
1.

Several types of connectors are used on the main board. make certain that all of these connectors
are connected properly.

2.

After checking these connectors, then connect the generator to AC power and power it on. Checkif the voltage values at all test points are within the specified range using a digital multimeter. The
voltage parameters to be tested are listed in “Table 6-3”.

6.8.1

Voltage Checking

Test the voltage points on the main board in the table below. To locate the test points, please refer tothe drawing of the main board. If each tested voltage value is not within the corresponding spec range
referring to “Table 6-3”, the main board is defective. Please return it to the factory for repair orcontact SIGLENT.
Table 6-3 Test Voltages of the Main Board

34

Test point

Voltage value

Error limit

VIN_12V

12 V

±10%

VCC21V21.7 V±10%

AVCC15V

15 V±5%AVEE-16V

-16 V

±5%

AVEE-18V

-18 V

±5%

AVEE-5V

-5 V

±5%

VCC5V

5V

±5%

VCC3V3

3.3 V±5%

VDD3V3

3.3 V

±5%

VCC1V

1V

±5%

AVCC1V8

1.8 V

±5%

VCC1V8

1.8 V±5%VCC1V2

1.2 V±5%

VCC5V55.5 V±5%AVCC5V

5V±5%

AVCC3V3

3.3 V

±5%

VCC_0.95V

0.95 V±5%

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SDG7000A Service Manual

6.8.2

10 MHz Clock Source and PLL Lock Status Checking

There is a TXCO/OCXO generating a 10 MHz clock source to the PLL. The PLL lock to the clock
source and generate all clock for the entire main board. Please check whether the PLL LED is on. If
it is on, it is locked.

6.8.3

FPGA Checking

To check if the FPGA is working properly, please observe the test point marked with FPGA_LED on
the main board drawing. The LED light blinks at a 1 Hz rate in normal operation. If it does not light, or
blinks at an incorrect frequency, then the FPGA may be fault.

6.8.4

Connector Checking
Table 6-4 Connectors of the Channel Board

Connector

Function

J15, J17

Communication between the main board and the channel board.

J9, J37

Communication between the main board and the OCXO module.

J25

Power supply of the main board.

J7

USB HOST interface of the front panel.

J6

Communication between the main board and the Key and LCD board.

J14, J16, J18,J19

Analog out to the channel board.

J38

Communication between the main board and the channel board.

J28, J30, J31

Power supply of the fans.

Table 9-4 explains the function of all the connectors on the main board. It is important to ensure that
all the connections are tight.

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6.9

Check the Channel Board

If it is desired to remove the channel board from the metal shelf inside the generator, please place it
on a clean, insulated mat. Here are the procedures for testing the channel board:
1.

Several types of connectors are used on the channel board. Make certain that all of theseconnectors are connected properly.

2.

After checking these connectors, then connect the generator to AC power and power it on. Checkif the voltage values at all test points are within the specified range using a digital multimeter. It
may be necessary to open the shielding cover of the channel board when testing the voltage.
The voltage parameters to be tested are listed in “Table 6-5”:

6.9.1

Voltage Checking

Test the voltage points on the channel board in the table below. To locate the test points, please referto the drawing of the channel board. If each tested voltage value is not within the corresponding spec
range referring to “Table 6-5”, the channel board is defective. Please return it to the factory forrepair or contact SIGLENT.
Table 6-5 Test Voltages of the Channel Board

36

Test point

Voltage value

Error limit

AVEE-15V

-15 V

±5%

AVCC15V

15 V±5%AVEE-16V

-16 V

±5%

VCC12V

12 V±10%AVEE-5V-5 V±5%

AVCC5V

5V±5%

AVCC2V5

2.5 V

±5%

AVEE-2V5-2.5 V±5%

AVCC8V4

8.4 V

±5%

AVEE-8V4A-8.4 V±5%

AVEE-8V4B-8.4 V±5%

AVEE-17VA

-17 V

±5%

AVEE-17VB

-17 V

±5%

AVEE-18VA

-18 V

±5%

AVEE-18VB

-18 V

±5%

VCC3V3

3V±5%

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SDG7000A Service Manual

6.9.2

Connector Checking
Table 6-6 Connectors of the Channel Board

Connector

Function

J9, J38

Communication between the main board and the channel board.

J10

Power supply of the channel board.

J1, J2, J3, J4

Analog input from the main board.

J5, J6, J7, J8

Analog output to BNC connector of the front panel.

Table 9-6 explains the function of all the connectors on the channel board. It is important to ensurethat all the connections are tight.

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SDG7000A Service Manual

6.10 Quick Guide for General Failures
The general hardware failures are described in the following. This information may help in determining
the cause of some general hardware failures:

1.

No start-up after pressing the power button:(1)

Check if the power cord is correctly connected.

(2)

Check if the power switch under the AC inlet is turn on.

(3)

Check if the power button is operating correctly.

(4)

Check whether the fuse has burned out. If the fuse is blown, please replace with afuse of the same rating.

2.

3.

4.

38

(5)

Check if the connection between the power module and the main board is tight.

(6)

If the instrument still does not work normally, please contact SIGLENT.

Starts up with a dark screen:(1)

Check the connection between the power module and the main board.

(2)

Check the connection between the keypad circuit board and the main board.

(3)

If the instrument still does not work normally, please contact SIGLENT.

No response after pressing any button, or abnormal display of the screen:(1)

Check the connection between the keypad circuit board and the main board.

(2)

If the instrument still does not work normally, please contact SIGLENT.

The output voltage amplitude measured is higher or lower than expected:(1)

Check the connection between the generator and the load.

(2)

Check if the impedance set in generator matches the input impedance of the load.

(3)

If the instrument still does not work normally, please contact SIGLENT.

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SDG7000A Service Manual

7

Maintenance

7.1

Maintain Summary

SIGLENT warrants that the products it manufactures and sells are free from defects in materials andworkmanship for a period of three years from the date of shipment from an authorized SIGLENT
distributor. If a product proves defective within the respective period, SIGLENT will provide repair or
replacement as described in the complete warranty statement.
To arrange for service or obtain a copy of the complete warranty statement, please contact yournearest SIGLENT sales and service office.
Except that as provided in this summary or the applicable warranty Statement, SIGLENT makes nowarranty of any kind, express or implied, including without limitation the implied warranties ofmerchantability and fitness for a particular purpose. In no case shall SIGLENT be liable for indirect,
special or consequential damages.

7.2

Repackaging for Shipment

If the unit must be returned to SIGLENT for service or repair, be sure to:1.

Attach a tag to the unit identifying the owner and indicating the required service or repair.

2.

Place the unit in its original container with appropriate packaging material for shipping.

3.

Secure the container with strong tape or metal bands.

If the original shipping container is not available, place your unit in a container which will ensure atleast 4 inches of compressible packaging material around all sides for the instrument. Use static-freepackaging materials to avoid additional damage to your unit.

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SDG7000A Service Manual

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

Follow us on
Facebook: SiglentTech

Europe: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

40

Website: www.siglenteu.com

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