SIGLENT

SSA3075X Plus
Spectrum Analyzer
Service Manual
E01A

SSA3075X Plus Service Manual 1

SIGLENT

Guaranty 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 worldwide◆ SIGLENT reserves the right to modify or change parts of or all the
specifications or pricing policies at the company’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 the permission of SIGLENT.
◆ SIGLENT will not be responsible for losses caused by either incidental orconsequential in connection with the furnishing, use, or performance of
this manual as well as any information contained.

Product Certification
SIGLENT guarantees this product conforms to the national and industrial
standards in China as well as the ISO9001: 2008 standard and the ISO14001:
2004 standard. Other international standard conformance certifications are in
progress.

SSA3075X Plus Service Manual 1

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General Safety Summary
Carefully read the following safety precautions to avoid any personal injury or damage
to the instrument and any products connected to it. To avoid potential hazards, please
use the instrument as specified.
Use Proper AC Power Line
Only the power cord designed for the instrument and authorized by the local country
should be used.
Ground the Instrument
The instrument is grounded through the protective earth conductor of the power line.
To avoid electric shock, please make sure the instrument is grounded correctly before
connecting its input or output terminals.
Connect the Probe Correctly.
If a probe is used, do not connect the ground lead to high voltage since it has isobaric
electric potential as the ground.
Look Over All Terminals’ Ratings
To avoid fire or electric shock, please look over all ratings and sign instructions of the
instrument. Before connecting the instrument, please read the manual carefully to gain
more information about the ratings.
Use Proper Overvoltage Protection
Make sure that no overvoltage (such as that caused by a thunderstorm) can reach the
product, or else the operator might be exposed to the danger of electrical shock.
Electrostatic Prevention
Operate the instrument in an electrostatic discharge protective area environment toavoid damages induced by static discharge. Always ground both the internal andexternal conductors of the cable to release static before connecting.
Maintain Proper Ventilation
Inadequate ventilation may cause an increase in the instrument’s temperature, which
will eventually damage the instrument. So keep well ventilated and inspect the intake
and fan regularly.
Avoid Exposed Circuit or Components
Do not touch exposed contacts or components when the power is on.
Do Not Operate Without Covers
Do not operate the instrument with covers or panels removed.
Use Only the Specified Fuse.
Keep Product Surfaces Clean and Dry.
To avoid the influence of dust and/or moisture in the air, please keep the surface of thedevice clean and dry.
Do Not Operate in Wet Conditions.
To avoid short-circuiting to the interior of the device or electric shock, please do not
operate the instrument in a humid environment.
Do Not Operate in an Explosive Atmosphere.
To avoid damage to the device or personal injury, it is important to operate the deviceaway from an explosive atmosphere.

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Safety Terms and Symbols
Terms on the product. These terms may appear on the product:

DANGER

Indicates direct injuries or hazards that may happen.

WARNING Indicates potential injuries or hazards that may happen.
CAUTION

Indicates potential damages to the instrument or other property that may
happen.

Symbols on the product. These symbols may appear on the product:

Hazardous

Protective

VoltageGroundWarning

Earth Chassis
Ground

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Contents.......................................................................................................................................................... 1
Guaranty and Declaration .......................................................................................................... 1
General Safety Summary .............................................................................................................. 2
Safety Terms and Symbols ........................................................................................................... 3
General Features .......................................................................................................................... 5
General Features .................................................................................................................. 5
Prepare Information ..................................................................................................................... 5
Functional check .................................................................................................................. 6
Power-on Inspection ................................................................................................... 6
Interface Test ......................................................................................................................... 7
USB Host Test ............................................................................................................... 8
USB Device Test ........................................................................................................... 8
Performance Verification Test ................................................................................................ 13
Absolute Amplitude Accuracy Test ......................................................................................... 14
Frequency Response Test ........................................................................................................ 16
Display Average Noise Level (DANL) Test ............................................................................ 18
TOI Test .................................................................................................................................. 21
Frequency Accuracy Test ........................................................................................................ 22
1dB Gain Compression Test .................................................................................................... 23
Second Harmonic Distortion Test ........................................................................................... 25
Input Attenuation Error Test .................................................................................................... 27
Tracking Generator (TG) Test ................................................................................................. 30
Assembly Procedures ............................................................................................................... 31
Security Considerations .......................................................................................................... 31
List of Modules ....................................................................................................................... 32
Required Tools ........................................................................................................................ 32
Disassembly Procedures.......................................................................................................... 33
Removing the Rear Panel ........................................................................................... 33
Removing the Front Panel .......................................................................................... 34
Removing the Rear Metal Cover ................................................................................ 35
Removing the Main Board, Channel Board .............................................................. 36
Removing the LCD, Keyboard .................................................................................... 37
Contact SIGLENT ....................................................................................................................... 38

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General Features
General Features
Siglent’s SSA3075X Plus spectrum analyzer offers a frequency range of 9
kHz up to 7.5 GHz. With their lightweight, small size, and friendly userinterface, the SSA3075X Plus presents a bright easy to read display, powerful
and reliable automatic measurements, and plenty of impressive features.
Applications are many but include research and development, education,
production, maintenance, and many more.

Table 1-1General features
Model
SSA3075X-Plus

SPAN
9kHz~
7.5GHzRBW

Phase noise

DANL<-98 dBc/Hz@1 GHz, -165

1 Hz~3 MHz

10 kHz offset

dBm/Hz◆ All-Digital IF Technology◆ Frequency Range from 9 kHz to 7.5 GHz◆ Up to 7.5 GHz Tracking Generator◆ Modulation Analysis◆ Advanced Measurement Kit◆ EMI Filter and Quasi Peak Detector Kit◆ 10.1-inch WVGA(1024x600)Display, Multi-Touch Screen◆ Remote Control via internal Web Browser as well as EasySpectrum, aWindows compatible software tool

Prepare Information
SSA3075X Plus Service Manual 5SIGLENT
Before initiating performance verification or any adjustments, it isrecommended to follow these procedures. The following topics are discussed
in this chapter.
⚫

How to perform functional checks⚫

How to operate four standard interface tests⚫

How to use the self-calibration routine⚫

How to recall factory Default settings

For more detailed information about the operation of the analyzer, please referto the SSA3000X Plus User Manual.

Functional check
There are three types of checks used to determine if the spectrum analyzer isoperating properly.

Power-on Inspection
The normal operating voltage for the SSA3075X Plus spectrum analyzer is in
the range of 100-240 VRMS, 50 Hz/ 60 Hz/ 440 Hz.
Please use the power cord provided as accessories to connect the instrument
to the power source as shown in the figure below.

The socket

Figure 1-1 Connect the power cord
Note: To avoid electric shock, make sure that the instrument iscorrectly grounded to the earth before connecting AC power.
Press the power-on button located at the lower-left corner of the front panel
and some keys will illuminate for about 6 seconds. Then, the boot screen will
6 SSA3075X Plus Service Manual

SIGLENT
appear on the display.
The front panel is shown in the figure below.

Figure 1-2 Front Panel

Figure 1-3 Rear PanelInterface Test
SSA3075X Plus Service Manual 7

SIGLENTThe SSA3075X Plus spectrum analyzer is designed with four standard
interfaces: USB Host, USB Device, LAN, and Earphone. Being connected toother instruments via these interfaces enables the analyzer to achieve evenmore enhanced capabilities. To ensure the analyzer is operating properly, it isrecommended to first test the interfaces.

USB Host Test
To test if the USB Host interface is working normally.
Tools:● USB memory device (U disk)
Steps：
1. Insert a U disk into the USB Host interface on the front panel of thespectrum analyzer.
2. An icon shaped like a U disk appears on the upper right of the screen, as
shown in the figure below. The icon appearance indicates the U disk has
been successfully recognized.

Figure 2-1 USB drive has been properly recognized

USB Device Test
To test if the USB Device interface works normally.
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Tools：● A computer with a USB interface that is compatible with running National
Instruments NI-MAX software● A standard USB cable (Type A-B)
● NI-MAX software
Steps：
1. Download and install National Instruments NI MAX software by following
the installation instructions provided by National Instruments.
2. Connect the analyzer USB Device port and the computer using a USB
cable.
3. Run NI MAX software. Click “Device and interface” at the upper left cornerof the NI software interface and immediately display the “USBTMC” device
symbol.

4. Click the “Open VISA Test Panel” option button, and then the following
Interface will appear. Then click the “Input/Output” option button and click
the “Query” option button to view the Read operation information.

SSA3075X Plus Service Manual 9SIGLENTLAN Port Test
Use to test the LAN interface functionality.
Tools：● A computer with a functional LAN interface● A standard LAN cable
Steps：
1. Connect the spectrum analyzer and the computer using a LAN cable via the
LAN interface.
2. Press System -> Interface ->LAN, Set IP Config to DHCP, as the figure
below shows. The analyzer will set IP Address and Subnet Mask and
Gateway automatically in this network.
Write down the displayed IP address. It will be used in later steps.

Figure 2-2 IP configuration interface
3. Run NI max software. Click “Device and interfaces” at the upper left cornerof the NI software interface, select “Network Devices”, Add Network Device,and select VISA TCP/IP Resource as shown:

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4. Select Manual Entry of LAN instrument, select Next, and enter the IP
address as shown. Click Finish to establish the connection:
NOTE: Leave the LAN Device Name BLANK or the connection will fail.

4. After a brief scan, the connection should be shown under Network Devices:
SSA3075X Plus Service Manual 11

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5. Right-click on the product and select Open NI-VISA Test Panel:

6. Click the “Input/Output” option button and click the “Query” option button. If
everything is correct, you will see the Read operation information returned
as shown below.
NOTE: The *IDN? command (known as the Identification Query) should return the
instrument manufacturer, instrument model, serial number, and otheridentification information.

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Performance Verification Test
This chapter explains testing the spectrum analyzer to verify performance
specifications. For accurate test results, please let the test equipment and theanalyzer warm-up 30 minutes before testing.
Here is the required equipment:
Table 3-1 Test equipment
Equipment

Specification

Qty.

Recommended

RF Generator

9 kHz~20 GHz

2E8257D

Signal Generator

100MHz1

SIGLENT SDG6050

Power Meter

18 GHz1

NRP18A

Frequency
Counter

10 MHz1

SIGLENT SDG6050
With OCXO

Low-pass Filter

Cut-off 50 MHz

1

Power Divider
SMA-N Cable

12 GHz>7.5 GHz

1
3

N-N Cable>7.5 GHz1BNC Cable

2 GHz

2

BNC-SMA Cable

2 GHz

1

Mini

SSA3075X Plus Service Manual 13

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Absolute Amplitude Accuracy Test
Specification
Preamp off ±0.4 dB, input signal -20 dBm
Preamp on ±0.6 dB, input signal -40 dBm
20 °C to 30 °C, fc = 50 MHz, RBW = 1 kHz, VBW = 1 kHz, peak detector,
attenuation = 20 dB
Absolute amplitude accuracy

Power Meter

USB

USB

PC

BNC-BNC
Ref IN

Ref OUT

RF Generator

SSA3075X PlusTG OUT

RF OUT

RF IN

N-SMA
N-SMA

N-SMA

Power divider

Figure 3-1 Absolute amplitude accuracy connections
Steps:
1. Connect the spectrum analyzer, signal generator, and power meter as infigure 3-1
2. Set the signal generator to output a sine waveform with 50 MHz frequency
and -20 dBm amplitude and enable the output
3. Configure the spectrum analyzer:(a) Set the center frequency to 50 MHz(b) Set the span to 1 MHz(c) Set the attenuation to 20 dB(d) Set the RBW and VBW to 1 kHz(e) Press Trace -> set Avg Times to 10, wait for trace average
4. Record measurement value P1 of the power meter
5. Press Peak to find the maximum value of the spectrum analyzer andrecord the result P2
6. Absolute amplitude accuracy = P1 – P2
7. Change the preamplifier on and set the output amplitude of the signal
generator to -40dBm. Repeat steps 3 to 6 and record the results.

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Record:Preamp off
Frequency
50 MHzPreamp on
Frequency
50 MHzP1 (Power Meter)

P2 (Spectrum Analyzer)

P1- P2P1 (Power Meter)

P2 (Spectrum Analyzer)

P1- P2

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SIGLENT

Frequency Response Test
Specification
Preamp off±0.8 dB±0.4 dB, typ.
Preamp on±1.2 dB±0.6 dB, typ.
20 °C to 30 °C , attenuation = 20 dB, reference frequency 50 MHz

Power Meter

USB

PC

BNC-BNC
Ref IN

Ref OUT

RF Generator

SSA3075X PlusTG OUT

RF OUT

RF IN

N-SMA
N-SMA

N-SMA

Power divider

Figure 3-2 Frequency response connections
Steps:
1. Connect the spectrum analyzer, signal generator, and power meter as
figure 3-2 shows
2. Set the signal generator to output a sine waveform with 50 MHz frequency
and -20 dBm amplitude and enable output
3. Read the measurement of the power meter record the result as reference
value P1
4. Configure the spectrum analyzer:(a) Set the center frequency to 50 MHz(b) Set the span to 1 MHz(c) Set the attenuation to 20 dB(d) Press Peak to find the maximum value and record as reference value
P2
5. Modify the output frequency of the signal generator at 100 kHz, 1 MHz, 10
MHz, 100 MHz, 1 GHz, 7.5 GHz
6. Read the measurement of the power meter record the result as A1,
SYSTEM ERROR = A1 – P1
7. Modify the center frequency of the spectrum analyzer so that it matches
the signal generator and find the peak value A2, calculate the GLOBALERROR = A2 – P2
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SIGLENT
8. Frequency response = |GLOBAL ERROR - SYSTEM ERROR|, compare
the calculated result with the specification
9.

Enable the preamplifier and set the output amplitude of the signal
generator to -40dBm. Repeat steps 3 to 8 and record the results.

Record:Preamp off
Frequency
50 MHzFrequency

P1 (PM)

P2 (SA)

A1(PM)

A2(SA)

P1 (PM)

P2 (SA)

A1(PM)

A2(SA)

A1 – P1(SystemError)

A2 – P2(GlobalError)

Frequency Pass/FailResponse

A1 – P1(SystemError)

A2 – P2(GlobalError)

Frequency Pass/FailResponse

100 kHz
1 MHz
10 MHz
100MHz1 GHz
7.5 GHz
Preamp on
Frequency
50 MHzFrequency
100 kHz
1 MHz
10 MHz
100MHz1 GHz
7.5 GHz

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Display Average Noise Level (DANL) Test
Specification
Frequency
RBW=1 Hz100 kHz ~1 MHz-105 dBm, -109 dBm (typ.)1 MHz~10 MHz-122 dBm, -126 dBm (typ.)10 MHz~200 MHz-142 dBm, -146 dBm (typ.)200 MHz ~1.5 GHz -142 dBm, -147 dBm (typ.)Preamp Off
1.5 GHz ~3.2 GHz-140 dBm, -145 dBm (typ.)3.2 GHz ~5.0 GHz-137 dBm, -143 dBm (typ.)5.0 GHz ~6.5 GHz-136 dBm, -141 dBm (typ.)6.5 GHz ~7.5 GHz-134 dBm, -139 dBm (typ.)100 kHz ~1 MHz-133 dBm, -136 dBm (typ.)1 MHz~10 MHz-151 dBm, -154 dBm (typ.)10 MHz~200 MHz-161 dBm, -165 dBm (typ.)200 MHz ~1.5 GHz -159 dBm, -163 dBm (typ.)Preamp On
1.5 GHz ~3.2 GHz-159 dBm, -162 dBm (typ.)3.2 GHz ~5.0 GHz-157 dBm, -161 dBm (typ.)5.0 GHz ~6.5 GHz-157 dBm, -160 dBm (typ.)6.5 GHz ~7.5 GHz-155 dBm, -159 dBm (typ.)
20 °C to 30 °C, attenuation = 0 dB, sample detector, trace average >50

SSA3075X PlusTG OUT

RF IN
50Ω Load

Figure 3-3 DANL verification connections
Step:
1. Connect a 50Ω load to the RF IN port of spectrum analyzer as the figureshows
2. Configure the spectrum analyzer:(a) Set the start frequency to 100 kHz and the stop frequency to 1MHz(b) Set the RBW to 10Hz and VBW to 1Hz(c) Set the detect type to Sample
3. Press Trace -> Avg Times and wait for trace average
4. Press Peak to find the maximum noise level of this frequency range,
record the marker value N
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5. Change the frequency range according to the specification table and set
the RBW to a suitable value, repeat steps 2 to 5, and test other frequency
ranges.
Record:Preamp
Off

PreampOn

Frequency
500.5 kHz5.005 MHz50.005 MHz
500.005 MHz
2.500005 GHz
4.500005 GHz
5.500005 GHz
7.500000 GHz
500.5 kHz5.005 MHz50.005 MHz
500.005 MHz
2.500005 GHz
4.500005 GHz
5.500005 GHz
7.500000 GHz

RBW=1 Hz
Amplitude-105 dBm, -109 dBm (typ.)-122 dBm, -126 dBm (typ.)-142 dBm, -146 dBm (typ.)-142 dBm, -147 dBm (typ.)-140 dBm, -145 dBm (typ.)-137 dBm, -143 dBm (typ.)-136 dBm, -141 dBm (typ.)-134 dBm, -139 dBm (typ.)-133 dBm, -136 dBm (typ.)-151 dBm, -154 dBm (typ.)-161 dBm, -165 dBm (typ.)-159 dBm, -163 dBm (typ.)-159 dBm, -162 dBm (typ.)-157 dBm, -161 dBm (typ.)-157 dBm, -160 dBm (typ.)-155 dBm, -159 dBm (typ.)Pass/Fail

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SIGLENT

Phase Noise Test
Specification<-96 dBc/Hz @10 kHz offset, <-98 dBc/Hz (typ.)<-95 dBc/Hz @100 kHz offset,<-97 dBc/Hz (typ.)<-112 dBc/Hz @1 MHz offset, <-114 dBc/Hz (typ.)
20 °C to 30 °C , attenuation = 0 dB, fc = 1 GHz
Phase noise

BNC-BNC

Ref IN

Ref OUT

RF Generator

SSA3075X PlusRF IN

TG OUT

RF OUT

N-N

Figure 3-4 Phase noise verification connections
Step:
1. Connect the signal generator and spectrum analyzer as figure 3-4 shows
2. Configure the spectrum analyzer:(a) Set the center frequency to 1 GHz(b) Set the span to 50 kHz(c) Set the RBW to 100 Hz(d) Set the attenuation = 0 dB(e) Set the detect type to Sample
3. Set the signal generator to output a sine waveform with 1000 MHz
frequency and -20 dBm amplitude and enable the output
4. Press Trace -> avg Times 100 and wait for trace average
5. Press peak to find the maximum value, record the peak value P1
6. Change marker type to delta and input 10kHz, press Marker Fn -> Noise
Marker, record the marker value P2
7. Phase noise = P2 - P1, compare the calculated result with specification
Record:Offset @1 GHz
10 kHz
100 kHz
1 MHz

P1

20 SSA3075X Plus Service Manual

P2

P2 - P1

Pass/FailSIGLENTTOI Test
Specification
IIP3+14 dBm
fc≥50 MHz, two -20 dBm tones at input mixer spaced by 100 kHz, attenuation= 0 dB, preamp off, 20 °C to 30 °C
BNC-BNC
Ref OUT

BNC-BNC

Ref IN

RF Generator

Ref OUT

RF Generator

RF OUT

Ref IN

SSA3075X Plus

RF OUTTG OUT

RF IN
N-SMA

N-SMA

N-SMA
Power divider

Figure 3-5 TOI verification connections
Step
1. Connect double signal generators to a power divider and the output of thedivider to RF IN port of spectrum analyzer
2. Configure the spectrum analyzer:(a) Set the center frequency to 1 GHz(b) Set the span to 1 MHz(c) Set the RBW to 10 kHz(d) Set the attenuation = 0 dB
3. Set the signal generator A to output a sine waveform with 1000 MHz
frequency and -20 dBm amplitude and enable output
4. Set the signal generator B to output a sine waveform with 1000.1 MHz
frequency and -20 dBm amplitude and enable output
5. Press Trace -> avg Times 100, and wait for trace average
6. Press Peak to find the maximum value, then change the marker type todelta and press Next Peak twice, record delta amplitude value DELTA
7. IIP3 = -20dBm – DELTA/2, check if the calculate result ≥ +14 dB
Record:Offset999.9 MHz
1000.2 MHz

DELTA

IIP3

Pass/Fail

SSA3075X Plus Service Manual 21

SIGLENT

Frequency Accuracy Test
Specification
Reference frequency
Initial calibration accuracy

10.000000 MHz<1 ppmChannel A

BNC-BNC

AWG Generator
Ref IN

Ref OUT

Channel B

OCXO

SSA3075X-R
TG OUT

RF IN

Figure 3-6 Connecting test instruments for frequency accuracy
Steps:
1. Connect ref out port of the spectrum analyzer to the channel A of the
SDG6050, which is referenced by an OCXO
2. Set the SDG6050 to frequency counter mode, and set frequency ref to
10.000000 MHz
3. Check if the frequency deviation ≤ 1 ppm
Record:Frequency
10.000000 MHz

Frequency Deviation

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Pass/FailSIGLENT

1dB Gain Compression Test
Specification

Power Meter

1dB Gain Compression>0dBm
20 °C to 30 °C, fc=50MHz , attenuation = 0 dB, preamp off

Ref OUT

SIGNAL Generator
RF OUT
BNC-SMAN-SMA

Ref INPower divider

RF Generator
RF OUT

N-SMA(a)Ref IN

Ref OUT

SSA3075X Plus

SIGNAL Generator

TG OUT

RF OUT

RF IN

BNC-SMAN-SMA
Ref INPower divider

RF Generator
RF OUT

N-SMA(b)Figure 3-7 connecting test instruments for 1dB Gain Compression Test
Steps:
1. Connect the signal generator, RF generator, and power meter as figure 37(a) shows
2. Set the output frequency of the signal generator to 50 MHz and theamplitude to -20 dBm. Set the output frequency of the RF generator to 53
MHz and the amplitude to 0 dBm.
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SIGLENT

3. Enable the output of the signal generator and disable the output of the RF
generator. Observe the measurement value of the power meter. Adjust theoutput amplitude of the signal generator until the reading of the power
meter becomes -20 dBm.
4. Enable the output of the RF generator and disable the output of the signal
generator. Observe the measurement value of the power meter. Adjust theoutput amplitude of the RF generator until the reading of the power meter
becomes 0 dBm.
5. Disconnect the power divider and power meter and connect the power
divider with the spectrum analyzer, as shown in Figure 3-7(b).
6. Enable the output of the signal generator and disable the output of the RF
generator.
7. Configure the spectrum analyzer:a) Set the center frequency to 50 MHz.
b) Set the span to 100 kHz.
c) Set the reference level to -20 dBm.
d) Set the input attenuation to 0 dB.
e) Set the resolution bandwidth to 1 kHz.
f) Set the sweep time to auto and the auto sweep time to accuracy.
8. Press Peak to find the maximum value and record it as reference value
P1.
9. Enable the output of the signal generator and the output of the RF
generator, find the peak value P2.
Record:P1

P2

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P1 – P2

SIGLENT

Second Harmonic Distortion Test
Specification

Power Meter

Second Harmonic Distortion Test<-65dBc
20 °C to 30 °C, fc=50MHz , attenuation = 0 dB, preamp off, mixer level=-30dBm

Ref OUT

RF Generator
RF OUT
N-SMA

Low Pass Filter

N-SMA

(a)

BNC-BNC

Ref IN

Ref OUT

RF Generator

SSA3075X Plus

N-SMA

RF IN

TG OUT

RF OUT

Low Pass Filter

N-SMA

(b)

Figure 3-8 connecting test instruments for Second Harmonic Distortion Test
Steps:
1. Connect the RF generator, 50MHz low pass filter, and power meter as
figure 3-8(a) shows
2. Set the output frequency of the RF generator to 50 MHz and the amplitude
to -30 dBm. Observe the measurement value of the power meter. Adjust
the output amplitude of the RF generator until the reading of the power
meter becomes -30 dBm.
3. Connect the RF generator, 50MHz low pass filter, and spectrum analyzer
as figure 3-8(b) shows. Enable the output of the RF generator.
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SIGLENT
4. Configure the spectrum analyzer:a) Set the center frequency to 50 MHz.
b) Set the span to 10 kHz.
d) Set the reference level to -30 dBm.
e) Set the input attenuation to 0 dB.
f) Set the resolution bandwidth to 300 Hz.
g) Set the video bandwidth to 10 Hz.
h) Set the sweep time to auto and the auto sweep time to accuracy.
5. Press Peak to find the maximum value P1. Then, set the center frequency
to 100 MHz, Press Peak to find the maximum value P2.
Record:P1

P2

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P1 – P2

SIGLENT

Input Attenuation Error Test
Specification

Power Meter

Input Attenuation Error Test<±0.5dB
20 °C to 30 °C, fc=50MHz , preamp off, mixer level=-30dBm

Ref OUT

RF Generator
RF OUT
N-N(a)

BNC-BNC

Ref OUT

Ref IN

RF Generator
RF OUT

SSA3075X PlusTG OUT

RF IN

N-N
(b)

Figure 3-9 connecting test instruments for Input Attenuation Error Test
Steps:
1. Connect the RF generator and power meter as figure 3-9(a) shows
2. Set the output frequency of the RF generator to 50 MHz and the amplitude
to -30 dBm. Observe the measurement value of the power meter. Adjust
the output amplitude of the RF generator until the reading of the power
meter becomes -30 dBm. Read the output amplitude from the RF
generator, record it as P-30.
3. Adjust the output amplitude of RF generator until the reading of the power
meter becomes -25, -20, -15, -10, -5, 0, 5, 10, 15, 20dBm respectively.
Record these values as P-25, P-20, P-15, P-10, P-5, P0, P5, P10, P15, P20.
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SIGLENT
4. Connect the RF generator and spectrum analyzer as figure 3-2(b) shows
5. Set the output frequency of the RF generator to 50 MHz and the amplitude
to P-10.
6. Configure the spectrum analyzer:a) Set the center frequency to 50 MHz.
b) Set the span to 10 kHz.
c) Set the reference level to 0 dBm.
d) Set the input attenuation to 20 dB.
e) Set the resolution bandwidth to 1 kHz and the video bandwidth to 10 Hz.
f) Set the sweep time to auto and the auto sweep time to accuracy.
7. Press Peak to find the maximum value P(ATT=20dB). Record
ΔP(ATT=20dB)=P(ATT=20dB)+10dBm as reference value.
8. Change the output amplitude of the RF generator to P-30。Set the input
attenuation of the spectrum analyzer to 0dB. Press Peak to find the
maximum value P(ATT=0dB). Record
ΔP(ATT=0dB)=P(ATT=0dB)+30dBm.
9. Repeat step 8, record the value
ΔP(ATT=5dB)=P(ATT=5dB)+25dBm,
ΔP(ATT=10dB)=P(ATT=10dB)+20dBm,
ΔP(ATT=15dB)=P(ATT=15dB)+15dBm,
ΔP(ATT=25dB)=P(ATT=25dB)+5dBm,
ΔP(ATT=30dB)=P(ATT=30dB),
ΔP(ATT=35dB)=P(ATT=25dB)-5dBm,
ΔP(ATT=40dB)=P(ATT=25dB)-10dBm,
ΔP(ATT=45dB)=P(ATT=25dB)-15dBm,
ΔP(ATT=50dB)=P(ATT=25dB)-20dBm.
Error(ATT=0dB)= ΔP(ATT=0dB)- ΔP(ATT=20dB),
Error(ATT=5dB)= ΔP(ATT=5dB)- ΔP(ATT=20dB),
Error(ATT=10dB)= ΔP(ATT=10dB)- ΔP(ATT=20dB),
Error(ATT=15dB)= ΔP(ATT=15dB)- ΔP(ATT=20dB),
Error(ATT=25dB)= ΔP(ATT=25dB)- ΔP(ATT=20dB),
Error(ATT=30dB)= ΔP(ATT=30dB)- ΔP(ATT=20dB),
Error(ATT=35dB)= ΔP(ATT=35dB)- ΔP(ATT=20dB),
Error(ATT=40dB)= ΔP(ATT=40dB)- ΔP(ATT=20dB),
Error(ATT=45dB)= ΔP(ATT=45dB)- ΔP(ATT=20dB),
Error(ATT=50dB)= ΔP(ATT=50dB)- ΔP(ATT=20dB).
Record:P0~-30
P-30
P-25
P-20
P-15

ATT
0
5
10
15

28 SSA3075X Plus Service Manual

P(ATT=0~30dB)

Error

SIGLENT
P-10
P-5
P0
P5
P10
P15
P20

20
25
30
35
40
45
50

——

SSA3075X Plus Service Manual 29

SIGLENT

Tracking Generator (TG) Test
Specification
Frequency range
Output level
Output flatness

100 kHz ~7.5 GHz-40 dBm ~ 0 dBm+/-3 dB

SSA3075X PlusTG OUT

RF IN
N-N

Figure 3-10 Connecting test instruments for TG Output
Steps:
1. Connect RF IN port and TG OUT port by an N-N cable as figure 3-10shows
2. Configure the spectrum analyzer:(a) Open the TG mode(b) Set the span to full span(c) Set the Ref level to 0 dB(d) Set the RBW and VBW to Auto
3. Press Peak to find the maximum value of the TG output, record the
maximum value P1, check if P1 < TG level + 3dB
4. Press Peak -> Search config -> Peak type ->min, to find the minimum
value of the TG output, record the maximum value P2, check if P2 >TG
level - 3dB

Record:TG level
0 dBm-10 dBm-20 dBm-40 dBmTG level
0 dBm-10 dBm-20 dBm-40 dBm

P1

P1-TG level

Pass/Fail

P2

P2-TG level

Pass/Fail

30 SSA3075X Plus Service Manual

SIGLENT

Assembly ProceduresThis chapter describes how to remove the major modules from the
SSA3075X-R spectrum analyzer. To install the removed modules or replace
new modules, please follow the corresponding operating steps in reverse
order.
This chapter includes the following topics:⚫

Security Consideration which describes security information needed toconsider while operating.

⚫

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

⚫

Required Tools which describes the tools needed to perform theprocedures.

⚫

Disassembly Procedures which describes in detail how to remove andinstall the modules.

Security Considerations
Only qualified personnel should perform the disassembly procedures.
Whenever possible, disconnect the power before you begin to remove or
replace the modules. Otherwise, possible personal injuries or damages to thecomponents may occur.
Avoid Electrical Shock Hazardous voltages exist on the LCD module andpower supply module. To avoid electrical shock, first, disconnect the power
cord from the analyzers and then wait at least three minutes for the capacitors
in the analyzers to discharge before you begin disassembly.
Preventing ESD Electrostatic discharge (ESD) can damage electronic
components. When doing any of the procedures in this chapter, use proper
ESD precautions. As a minimum, place the analyzers on a properly grounded
ESD mat and wear a properly grounded ESD strap.

SSA3075X Plus Service Manual 31

SIGLENT

List of Modules
The following removable modules are listed in the order of performing
disassembly procedures.
Table 4-1 List of modules
Number of Module

Module1Rear Panel

2

Front-Panel

3

Rear Metal Cover

4

Front Metal Cover

5

Power Supply Module

6

Main Boards

8

Keyboard Module

9

Display Module

Required Tools
Use these tools to remove or replace the modules in the analyzers:⚫

Multifunctional screwdriver⚫

Antistatic gloves⚫

Custom screw hexagonal nut tool or long nose pliers

32 SSA3075X Plus Service Manual

SIGLENT

Disassembly ProceduresThis section describes how to remove and install the modules listed above inthe spectrum analyzer in detail. Complete disassembly will be best achieved
through the following operating steps.

Removing the Rear Panel

Figure 4-1 Removing the Rear Panel Screws
Removal steps:
1. Remove each rear panel screws as shown in the figures above.
2. Press the place of the front panel as the arrows point in the first figure andremove the rear panel from the machine.
To install the rear metal cover, please perform these steps in reverse order.
SSA3075X Plus Service Manual 33

SIGLENT

Removing the Front Panel

Figure 4-2 Removing the front panel
Removal steps：
1. Place the analyzer face down on a soft surface such as an anti-static mat.
2. Remove the six screws located on the rear panel. In this same position,
remove the four screws located on the standing legs.
3. Lift the rear panel up and off carefully.
To install the rear panel, please follow these same steps in reverse order.

34 SSA3075X Plus Service Manual

SIGLENT

Removing the Rear Metal Cover

BNC nuts

Figure 4-3 Removing the rear metal cover
Removal steps：
1. Place the analyzer down on a soft surface such as an anti-static mat.
2. Remove the screws located on the rear metal cover.
3. Remove three nuts from the Back BNC terminal.
4. Disconnect the power cable and fan cable connected to the mainboard
module from the power supply module.
5. The edge of the rear metal cover is sharp, please lift the rear metal coverup and off carefully to avoid personal injury.
To install the rear metal cover, please perform these steps in reverse order.
SSA3075X Plus Service Manual 35

SIGLENT

Removing the Main Board, Channel Board

Figure 4-4 View of front panel subassembly with the mainboard
Removal steps:
1. Place the analyzer backside down on a soft surface such as an anti-static
mat.
2. Remove the screws located on the metal shelf and each board.
3. Remove the RF board, TG board, Digital board from the metal shelf.
To install the front panel, please perform these steps in reverse order.

36 SSA3075X Plus Service Manual

SIGLENT

Removing the LCD, Keyboard

Figure 4-5 Removing the LCD and keyboard
Removal steps:
1. Remove the silicone keypad.
2. Remove the four screws located on the edge of the display module.
3. Remove the six screws located on the channel board.
4. Remove the seven screws located on the keyboard.
5. Disconnect the cable that connected the keyboard and the channel board.
6. Separate the modules carefully.

SSA3075X Plus Service Manual 37

SIGLENT

Contact SIGLENTSIGLENT Technologies Co., Ltd
Address：3/F, building NO.4, Antongda Industrial Zone, 3rd LiuxianRoad, Bao’an District, Shenzhen, P.R.China
Tel：0086-755-3661 5186
E-mail: sales@siglent.com
http://www.siglent.com

SIGLENT Technologies North America, Inc
Address: 6557 Cochran Rd Solon, Ohio 44139
Tel: 440-398-5800
Toll Free:877-515-5551
Fax: 440-399-1211
E-mail: info@siglentna.com
http://www.siglentna.com

SIGLENT Technologies Europe GmbH
Staetzlinger Str. 70, 86165 Augsburg, Germany
Tel: +49(0)-821-666 0 111 0
Fax: +49(0)-821-666 0 111 22
E-mail: info-eu@siglent.com
Web: www.siglenteu.com

38 SSA3075X Plus Service Manual