SIGLENT TECHNOLOGIES SSA5000 Series User manual

SSA5000X
Spectrum Analyzer
Service Manual
EN_01B

SSA5000A Service Manual I
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 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.

II SSA5000A Service Manual
Important Safety Information
This manual contains information and warnings that must be followed by the user for safe
operation and to keep the product in a safe condition.
General Safety Summary
Carefully read the following safety precautions to avoid personal injury and prevent damage to
the instrument and any products connected to it. To avoid potential hazards, please use the
instrument as specified.
To Avoid Fire or Personal Injury.
Use Proper Power Line.
Only use a local/state approved power cord for connecting the instrument to mains power
sources.
Ground the Instrument.
The instrument grounds through the protective terra conductor of the power line. To avoid electric
shock, the ground conductor must be connected to the earth. Make sure the instrument is grounded
correctly before connect its input or output terminals.
Connect the Signal Wire Correctly.
The potential of the signal wire is equal to the earth, so do not connect the signal wire to a high
voltage. Do not touch the exposed contacts or components.
Look over All Terminals’ Ratings.
To avoid fire or electric shock, please look over all ratings and signed instructions of the instrument.
Before connecting the instrument, please read the manual carefully to gain more information about
the ratings.
Equipment Maintenance and Service.
When the equipment fails, please do not dismantle the machine for maintenance. The equipment
contains capacitors, power supply, transformers, and other energy storage devices, which may
cause high voltage damage. The internal devices of the equipment are sensitive to static electricity,
and direct contact is easy to cause irreparable damage to the equipment. It is necessary to return
to the factory or the company's designated maintenance organization for maintenance.
Be sure to pull out the power supply when repairing the equipment. Live line operation is strictly
prohibited. The equipment can only be powered on when the maintenance is completed and the
maintenance is confirmed to be successful.
Identification of Normal State of Equipment.

SSA5000A Service Manual III
After the equipment is started, there will be no alarm information and error information at the
interface under normal conditions. The curve of the interface will scan from left to right freely; if
there is a button in the scanning process or there is an alarm or error prompt, the device may be in
an abnormal state. You need to view the specific prompt information. You can try to restart the
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 to carry out maintenance to avoid
the wrong test data caused by the use of the fault or endanger the personal safety.
Not Operate with Suspected Failures.
If you suspect that there is damage to the instrument, please let qualified service personnel check
it.
Avoid Circuit or Wire Exposed Components Exposed.
Do not touch exposed contacts or components when the power is on.
Do not operate in wet/damp conditions.
Do not operate in an explosive atmosphere.
Keep the surface of the instrument clean and dry.
Not to use the equipment for measurements on mains circuits, not to use the equipment for
measurements on voltage exceed the voltage range describe in the manual. The maximum
additional transient voltage cannot exceed 1300V.
The responsible body or operator should refer to the instruction manual to preserve the
protection afforded by the equipment. If the equipment is used in a manner not specified by
the manufacturer, the protection provided by the equipment may be impaired.
Any parts of the device and its accessories are not allowed to be changed or replaced,
other than authorized by the manufacturer or agent.

IV SSA5000A Service Manual
Safety Terms and Symbols
When the following symbols or terms appear on the front or rear panel of the instrument or in this
manual, 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 analyzer’s state switches between Operation and Standby. This switch does
not disconnect the device's power supply. To completely power off the analyzer,
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".
CAUTION
The "CAUTION" symbol indicates a potential hazard. It calls attention to a
procedure, practice, or condition which may be dangerous if not followed. Do
not proceed until its conditions are fully understood and met.
WARNING
The "WARNING" symbol indicates a potential hazard. It calls attention to a
procedure, 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.

SSA5000A Service Manual V
Working Environment
The design of the instrument has been verified to conform to EN 61010-1 safety standard per the
following limits:
Environment
The instrument is used indoors and should be operated in a clean and dry environment with an
ambient temperature range.
Note: Direct sunlight, electric heaters, and other heat sources should be considered when
evaluating the ambient temperature.
Warning: Do not operate the instrument in explosive, dusty, or humid
environments.
Ambient Temperature
Operating: 0 ℃ to +50 ℃
Non-operation: -30 ℃ to +70 ℃
Note: Direct sunlight, radiators, and other heat sources should be taken into account when
assessing the ambient temperature.
Humidity
Operating: 5% ~ 90 %RH, 30 ℃, derate to 50 %RH at 40 ℃
Non-operating: 5% ~ 95% RH
Mains supply voltage fluctuations
Refer to 2.5 Power and Ground Requirements
Altitude
Operating: ≤ 3,000 m, 25 ℃
Non-operating: ≤ 12,000 m

VI SSA5000A Service Manual
Installation (overvoltage) Category
This product is powered by mains conforming to installation (overvoltage) Category II.
Note: Installation (overvoltage) category I refers to situations where equipment measurement
terminals are connected to the source circuit. In these terminals, precautions are done to limit the
transient voltage to a correspondingly low level.
Installation (overvoltage) category II refers to the local power distribution level which applies to
equipment connected to the AC line (AC power).
Degree of Pollution
The analyzers may be operated in environments of Pollution Degree II.
Note: Degree of Pollution II refers to a working environment that is dry and non-conductive
pollution occurs. Occasional temporary conductivity caused by condensation is expected.
IP Rating
IP20 (as defined in IEC 60529).
Cooling Requirements
This instrument relies on the forced air cooling with internal fans and ventilation openings. Care
must be taken to avoid restricting the airflow around the apertures (fan holes) at each side of the
analyzer. To ensure adequate ventilation it is required to leave a 15 cm (6 inch) minimum gap
around the sides of the instrument.
CAUTION: Do not block the ventilation holes located on both sides of the
analyzer.
CAUTION: Do not allow any foreign matter to enter the analyzer through the
ventilation holes, etc.

SSA5000A Service Manual VII
Power and Grounding Requirements
The instrument operates with a single-phase, 100 to 240 Vrms (+/-10%) AC power at 50/60 Hz
(+/-5%), or single-phase 100 to 120 Vrms (+/-10%) AC power at 400 Hz (+/-5%).
No manual voltage selection is required because the instrument automatically adapts to line
voltage.
Depending on the type and number of options and accessories (probes, PC port plug-in, etc.), the
instrument can consume up to 193 W of power.
Note: The instrument automatically adapts to the AC line input within the following ranges:
Voltage Range:
90 - 264 Vrms
90 - 132 Vrms
Frequency Range:
47 - 63 Hz
380 - 420 Hz
The instrument includes a grounded cord set containing a molded three-terminal polarized plug
and a standard IEC320 (Type C13) connector for making line voltage and safety ground connection.
The AC inlet ground terminal is connected directly to the frame of the instrument. For adequate
protection against electrical shock hazards, the power cord plug must be inserted into a mating AC
outlet containing a safety ground contact. Use only the power cord specified for this instrument and
certified for the country of use.
Warning: Electrical Shock Hazard!
Any interruption of the protective conductor inside or outside of the analyzer,
or disconnection of the safety ground terminal creates a hazardous situation.
Intentional interruption is prohibited.
The position of the instrument should allow easy access to the socket. To make the instrument
completely power off, unplug the instrument power cord from the AC socket.
The power cord should be unplugged from the AC outlet if the analyzer is not to be used for an
extended period.
CAUTION: The outer shells of the front panel terminals are connected to the
instrument’s chassis and therefore to the safety ground.

VIII SSA5000A Service Manual
Cleaning
Clean only the exterior of the instrument, using a damp, soft cloth. Do not use chemicals or abrasive
elements. Under no circumstances allow moisture to penetrate the instrument. To avoid electrical
shock, unplug the power cord from the AC outlet before cleaning.
Warning: Electrical Shock Hazard!
No operator serviceable parts inside. Do not remove covers.
Refer servicing to qualified personnel
Abnormal Conditions
Do not operate the analyzer if there is any visible sign of damage or has been subjected to
severe transport stresses.
If you suspect the analyzer’s protection has been impaired, disconnect the power cord and
secure the instrument against any unintended operation.
Proper use of the instrument depends on careful reading of all instructions and labels.
Warning: Any use of the analyzer in a manner not specified by the
manufacturer may impair the instrument’s safety protection. This instrument
should not be directly connected to human subjects or used for patient
monitoring.
Safety Compliance
This section lists the safety standards with which the product complies.
U.S. nationally recognized testing laboratory listing
1. UL 61010-1:2012/R:2019-07. Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use – Part 1: General Requirements.
2. UL 61010-2-030:2018. Safety Requirements for Electrical Equipment for Measurement,
Control, and Laboratory Use – Part2-030: Particular requirements for testing and measuring
circuits.

SSA5000A Service Manual IX
Canadian certification
1. CAN/CSA-C22.2 No. 61010-1:2012/A1:2019-07. Safety Requirements for Electrical
Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements.
2. CAN/CSA-C22.2 No. 61010-2-030:2018. Safety Requirements for Electrical Equipment for
Measurement, Control, and Laboratory Use – Part 2-030: Particular requirements for testing
and measuring circuits.

X SSA5000A Service Manual
Contents
Copyright and Declaration................................................................................................................. I
Important Safety Information............................................................................................................ II
General Features.............................................................................................................................. 1
Prepare Information.......................................................................................................................... 2
Functional check............................................................................................................................... 3
Power-on Inspection ................................................................................................................. 3
Interface Test .................................................................................................................................... 5
USB Host Test ........................................................................................................................... 5
USB Device Test ....................................................................................................................... 6
LAN Port Test ............................................................................................................................ 7
Performance Verification Test..........................................................................................................11
Absolute Amplitude accuracy Test .......................................................................................... 12
Frequency Response Test ...................................................................................................... 14
Display Average Noise Level (DANL) Test.............................................................................. 17
Phase Noise Test .................................................................................................................... 19
TOI Test ................................................................................................................................... 21
Frequency Accuracy Test ........................................................................................................ 23
1dB Gain Compression Test ................................................................................................... 24
Second Harmonic Distortion Test............................................................................................ 26
Input Attenuation Error Test..................................................................................................... 28
Assembly Procedures................................................................................................................... 31
Security Consideration ............................................................................................................ 31
List of Modules ........................................................................................................................ 32
Required Tools ........................................................................................................................ 32
Diagram of Spectrum Analyzer ............................................................................................... 33
Introduction of RF Cable and Interface................................................................................... 34
Disassembly Procedures ........................................................................................................ 34

SSA5000A Service Manual XI
Removing the Back-Shell................................................................................................. 35
Removing the Rear Metal Cover ..................................................................................... 36
Removing the Local Oscillator Board, Frequency Multiplier Board, Channel Board,
Intermediate Frequency Board ........................................................................................ 37
Removing the Main Board ............................................................................................... 39
Removing the Front Metal Cover..................................................................................... 40
Removing the Key Board and LCDI Board...................................................................... 41
Removing the USB Board................................................................................................ 42
Removing the Power Supply Board and IOB Board........................................................ 43

SSA5000A Service Manual 1
General Features
Siglent’s SSA5000A family of spectrum analyzers offer a frequency range of 9 kHz to 26.5GHz.
With their light weight, small size, and friendly user interface, the SSA5000A 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 General features
Model
SPAN
Phase noise
DANL
SSA5083A
9 kHz~13.6 GHz
<-105 dBc/Hz@1 GHz, 10 kHz offset
-165 dBm/Hz
SSA5085A
9 kHz~26.5 GHz
<-105 dBc/Hz@1 GHz, 10 kHz offset
-165 dBm/Hz
⚫All-Digital IF Technology
⚫Frequency Range from 9 kHz up to 26.5 GHz
⚫-165 dBm/Hz Displayed Average Noise Level (Typ.)
⚫-105 dBc/Hz @10 kHz Offset Phase Noise (1 GHz, Typ.)
⚫1 Hz Minimum Resolution Bandwidth (RBW)
⚫40MHz Maximum Bandwidth
⚫Real-Time Spectrum Analysis
⚫12.1 Inch WVGA（1280 x 800 pixels）Display

2 SSA5000A Service Manual
Prepare 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 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 analyzers operation, please refer to the SSA5000A User
Manual.

SSA5000A Service Manual 3
Functional check
Power-on Inspection
The normal operating voltage for SSA5000X series spectrum analyzers is in the range of 100-
240V, 50/60Hz or 100-120V 400Hz.
Please use the power cord provided as accessories to connect the instrument to the power
source as shown in the figure below.
Figure 1 Connect power cord
Note: To avoid electric shock, make sure that the instrument is correctly
grounded to the earth before connecting AC power.
The socket

4 SSA5000A Service Manual
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 appear on the display.
Figure 2 Front Panel

SSA5000A Service Manual 5
Interface Test
There are several types of interfaces: USB Host, USB Device, LAN and Earphone. Being
connected to other instruments via these interfaces enables the analyzer to achieve even more
enhanced capabilities. In order to ensure the analyzer is operating properly, it is recommended 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 the spectrum analyzer.
2. An icon shaped like a U disk appears on the upper right of the screen, as shown in figure
below. The icon appearance indicates the U disk has been successfully recognized.
USB drive has been properly recognized

6 SSA5000A Service Manual
USB Device Test
To test if the USB Device interface works 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 analyzer USB Device port and the computer using an USB cable.
3. Run NI MAX software. Click “Device and interface” at the upper left corner of the NI software
interface and immediately displays the “USBTMC” device symbol.
4. Click “Open VISA Test Panel” option button, and then the following.
Then click the “Input/Output” option button and click the “Query” option button in order to
view the Read operation information.