SIGLENT SSG5000A User manual

SSG3000A Service Manual 1
Service Manual
SM0805A-E01A
SSG5000A
Signal Generator

SSG5000A Service Manual 1
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 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 or consequential 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 certification is in progress.

2 SSG5000A Service Manual
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 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 observe all ratings and label notices on this 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 enter the product, or
else the operator might be exposed to danger of electrical shock.
Electrostatic Prevention
Operate the instrument in an electrostatic discharge protective area environment to avoid damages
induced by static discharge.Always ground both the internal and external conductors of the cable to
release static before connecting.
Maintain Proper Ventilation
Inadequate ventilation may cause increasing of 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.

SSG5000A Service Manual 3
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 the device clean
and dry.
Do Not Operate in Wet Conditions.
In order 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.
In order to avoid damage to the device or personal injury, it is important to operate the device away
from an explosive atmosphere.

4 SSG5000A Service Manual
Safety Terms and Symbols
Terms on the product. These terms may appear on the product:
DANGER: Indicates an injury or hazard that may immediately happen.
WARNING: Indicates an injury or hazard that may not immediately happen.
CAUTION: Indicates that a potential damage to the instrument or other property might occur.
Symbols on the product. These symbols may appear on the product:
Hazardous
Voltage
Protective
Ground
Warning
Earth Chassis
Ground

SSG5000A Service Manual 5
Contents
Guaranty and Declaration.................................................................................................................. 1
General Safety Summary................................................................................................................... 2
Safety Terms and Symbols................................................................................................................ 4
Preparation Information..................................................................................................................... 7
Power-on Inspection ..................................................................................................................... 7
Interface Test................................................................................................................................. 8
USB Host Test........................................................................................................................ 8
USB Device Test.................................................................................................................... 9
LAN Port Test....................................................................................................................... 10
Performance Verification Test......................................................................................................... 14
10 MHz output accuracy test ...................................................................................................... 14
Absolute amplitude accuracy test............................................................................................... 15
Second Harmonics...................................................................................................................... 21
Internal AM modulation test ........................................................................................................ 23
Internal FM modulation test ........................................................................................................ 25
Internal ΦM modulation test........................................................................................................ 27
Pulse modulation test.................................................................................................................. 30
LF AC test.................................................................................................................................... 32
LF DC test................................................................................................................................... 33
Assembly Procedures...................................................................................................................... 35
Safety Considerations................................................................................................................. 35
List of Modules............................................................................................................................ 36
Required Tools ............................................................................................................................ 36
Disassembly Procedures............................................................................................................ 36
Remove the Outer Cover..................................................................................................... 37
Remove the Channel plate Module..................................................................................... 38
Remove the Power Module ................................................................................................. 39

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Remove the frequency multiplication plate module............................................................. 40
Remove the Mechanical attenuator module........................................................................ 41
Remove the Control Board.................................................................................................. 42
Remove the Main Board...................................................................................................... 43
Remove the front panel ....................................................................................................... 44
Remove the LCD and Keyboard.......................................................................................... 45
Contact SIGLENT.............................................................................................................................. 46

SSG5000A Service Manual 7
Preparation Information
Before initiating performance verification or any adjustments, it is recommended to follow these
procedures. The following topics are discussed in this chapter.
⚫How to perform power-on inspection.
⚫How to perform interface test.
For more detailed information about the signal generator operation, please refer to the SSG5000A
User Manual.
Power-on Inspection
The normal operating voltage for SSG5000A series signal generator is in the range of 100-240
VRMS, 50/60Hz or 100-120 VRMS, 400Hz.
Please use the power cord provided in the accessories to connect the instrument to the power
source as shown in the figure below.
Power
Interface
Figure 1 Connect power cord
Note: To avoid electric shock, make sure that the instrument is correctly grounded
to the earth before connectingAC power.
Press the power-on button located at the lower left corner of the front panel and several keys will
illuminate for about 6 seconds. Then, the boot screen will appear on the display.

8 SSG5000A Service Manual
The front and rear panels are shown in the figures below.
Figure 2 Front Panel
Figure 3 Rear Panel
Interface Test
The SSG5000Aseries signal generator is designed with three standard interfaces: USB Host, USB
Device and LAN. Being connected to other instruments via these interfaces enables the signal
generator to achieve additional capabilities. To ensure the signal generator is working properly, it is
recommended to test the interfaces first.
USB Host Test
To test if the USB Host interface is working normally.
Tools:
⚫USB memory device (U disk)

SSG5000A Service Manual 9
Steps:
1. Insert a U disk into the USB Host interface on the front panel of the signal generator.
2. An icon shaped like a U disk appears on the upper right corner of the screen, as shown in figure
below. The appearance of the icon indicates the U disk has been successfully recognized.
Figure 4 USB drive has been properly recognized
USB Device Test
To test if the USB Device interface is working normally.
Tools:
⚫A computer with 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 signal generator USB Device port and the computer with an USB cable.
3. Run NI MAX software. Click “Device and interface” at the upper left corner of the NI software

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interface and it immediately displays the “USBTMC” device symbol.
4. Click “Open VISA Test Panel”, and then the VISATest Panel as shown in the following picture
will appear. Then click the “Input/Output” option button on the VISATest Panel and click the
“Query” option button to view the Read operation information.
LAN Port Test
To test if the LAN interface is working normally.
Tools:
⚫A computer with functional LAN interface
⚫A standard LAN cable
Steps:

SSG5000A Service Manual 11
1. Connect the signal generator and the computer with a LAN cable via LAN interface.
2. Press UTILITY -> Interface , and set DHCP State ON, as shown in the following figure.
The signal generator will set IPAddress, Subnet Mask and Gateway automatically in this
network.
3. Write down the displayed IP address. It will be used in later steps.
Figure 5 IP configuration interface
4. Run NI Max software. Click “Device and interfaces”in the upper left corner of the NI software
interface, select “Network Devices”, “Add Network Device”, and select “VISATCP/IP Resource”
as shown:
5. Select Manual Entry of LAN instrument, click “Next”, and enter the IP address as shown in the
following figures. Click Finish to establish the connection.

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Note: Leave the LAN Device Name BLANK or the connection may fail.
6. After a brief scan, the connection will be shown under Network Devices:

SSG5000A Service Manual 13
7. Right-click on the product and select Open VISATest Panel.
8. Click the “Input/Output” option button on the VISATest Panel and click the “Query” option button
to view the Read operation information.
Note: The *IDN? Command (known as the Identification Query) should return the instrument
manufacturer, instrument model, serial number, and other identification information.

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Performance Verification Test
This chapter explains testing the signal generator in order to verify performance specifications. For
accurate test results, please let the test equipment and the signal generator warm up 30 minutes
before testing.
Below is the required equipment:
Table 1 Test equipment
Equipment
Specification
Qty.
Recommended
Signal Analyzer
20Hz ~ 26.5 GHz
1
Keysight N9020
Power Meter
40GHz
1
R&S NRP40T
Frequency Counter
10 MHz
1
53220A
N-2.92mm Cable
20GHz
1
BNC Cable
2 GHz
1
10 MHz output accuracy test
Specification
Reference frequency
10.000000 MHz
Initial calibration accuracy
< 100 ppb
Test Connection Diagram
10MHz OUT
SSG5000A 53220A

SSG5000A Service Manual 15
Test Procedures
1. Connect [ 10MHz OUT ] port of the signal generator to the channelA of the 53220A.
2. Set the 53220Ato frequency counter mode, and set frequency ref to 10.000000 MHz
3. Check if the frequency deviation ≤100ppb
Test Record Form
Frequency
Frequency Deviation
Pass/Fail
10.000000 MHz
Absolute amplitude accuracy test
Specification
Level error (ALC on, temperature is 20 ℃~30 ℃)
Frequency (f)
Max
performance
power to 13
dBm
13 dBm ~
-20 dBm
-20 dBm ~
-90dBm
-90 dBm ~
-110 dBm
-110 dBm ~
-120 dBm
9 kHz ≤f <100 kHz
≤0.7 dB
≤1.1 dB
100kHz ≤f <1MHz
≤0.7 dB
≤0.7 dB
≤1.1 dB
1MHz ≤f ≤4 GHz
≤1dB
≤0.7 dB
≤0.7 dB
≤1.1 dB
≤2 dB
4 GHz < f ≤6 GHz
≤1dB
≤0.7 dB
≤0.7 dB
≤1.1 dB
≤2 dB
6 GHz < f ≤13.6 GHz
≤1dB
≤0.7 dB
≤0.7 dB
≤1.1 dB
≤2 dB
13.6 GHz < f ≤20 GHz
≤1dB
≤0.7 dB
≤0.9 dB
≤1.1 dB
≤2 dB
Test Devices
1. Power Meter ×1
2. SMA-2.92mm Adaptor ×1
3. Dual-BNC Cable ×1
4. Signal generator ×1

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Test Connection Diagram
RF OUTPUT
NRP40T
(a)
RF OUTPUT
N-2.92mm Cable
RF INPUT
Ref IN
10MHz OUT
(b)
Figure 6Absolute amplitude accuracy connections
Test Procedures
1. Connect the RF output terminal of the SSG5000Awith the power meter, as shown in Figure 6
(a).
2. Set the SSG5000A to output a sine waveform with -10 dBm amplitude. Then modify the output
frequency of the SSG5000Aaccording to Table 2 and enable the RF output.
3. Modify the frequency of the power meter accordingly each time the output frequency of the
SSG5000A is modified. Read the amplitude measurement value A1 and record it to the test
record form.
4. Disconnect the SSG5000A and the power meter. Connect the [ 10 MHz OUT ] terminal of the
signal analyzer with the [ EXT REF IN ] terminal at the rear panel of the signal generator using a
dual-BNC cable to synchronize the two instruments.

SSG5000A Service Manual 17
5. Connect the [ RF OUTPUT ] terminal of the SSG5000Awith the input terminal of the signal
analyzer using a dual-N cable as shown in Figure 6 (b).
6. Configure the signal analyzer:
1) Set the self-calibration to normal and perform all of the calibration items
2) Select the external frequency reference input.
3) Set the span to 100 Hz.
4) Set the reference level to -20 dBm.
5) Set the input attenuation to 10 dB.
6) Set the resolution bandwidth to 1 Hz.
7. Set the output frequency of the SSG5000Aand the center frequency of the signal analyzer
according to Table 2 (the center frequency of the signal analyzer corresponds to the output
frequency of the SSG5000A).
8. Each time the center frequency is changed, wait for the signal analyzer to finish a sweep and
then press Peak Search to find the maximum peak. Read the peak value A2 and record it to the
test record form.
9. System Error (the input attenuation of the signal analyzer is 10 dB) = A2 - A1 and record the
measurement result.
10. Keep the connection shown in Figure 6 (b) unchanged. Press Mode Preset to restore the signal
analyzer to its factory setting and set the output amplitude of the SSG5000A according to Table
3.
11. Each time the output amplitude is changed, set the output frequency of the SSG5000A and the
center frequency of the signal analyzer according to Table 2 (the center frequency of the signal
analyzer corresponds to output frequency of the SSG5000A).
12. Each time the center frequency is changed, wait for the signal analyzer to finish a sweep and
then press Peak Search to find the maximum peak. Read the peak value A3 and record it to the
test record form.
Note: when the output amplitude of the SSG5000Ais -10 dBm, the measurement result A3,
namely, is the measurement value A2 of the signal analyzer in step 8.
13. Calculate the Global Error = A3 - Reference Value and record the result.
14. Calculate the amplitude accuracy using the formula Amplitude Accuracy = |Global Error -
System Error| and compare the calculation result with the specification.

18 SSG5000A Service Manual
Table 2 Output Frequency of the SSG5000A
Output Frequency
103
kHz
1.33
MHz
51.33
MHz
533
MHz
1.933
GHz
2.433
GHz
2.933
GHz
3.933
GHz
4.933
GHz
5.933
GHz
7.933
GHz
9.433
GHz
11.933
GHz
13.933
GHz
15.933
GHz
17.933
GHz
19.933
GHz
Note: When the frequency of the signal measured is less than 10 MHz, make certain the signal
analyzer is in the DC coupling mode to ensure the measurement accuracy.
Table 3 Output Amplitude of the SSG5000A
Output amplitude
-10 dBm
-50 dBm
-90 dBm
-120 dBm
Test Record Form
SSG5000A Output
Frequency
Power Meter
Measurement Value A1
Signal Analyzer
Measurement Value A2
System
Error
103 kHz
1.33 MHz
51.33 MHz
533 MHz
1.933 GHz
2.433 GHz
2.933 GHz
3.933 GHz
4.933 GHz
5.933 GHz
7.933 GHz
9.933 GHz
11.933 GHz
13.933 GHz
15.933 GHz
17.933 GHz
19.933 GHz