SIGLENT SDS2352X-E User manual

SIGLENT
SDS1000X-E Service Manual I
SDS2000X-E Series
Digital Oscilloscope
Service Manual
E01A

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 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.
Product Certification
SIGLENT guarantees this product conforms to the national and industrial stands in
China and other international stands conformance certification is in progress.
Contact Us
If you have any problem or requirement when using our products, please contact
SIGLENTTECHNOLOGIES CO., LTD
Add：3//F, Bldg No.4, Antongda Industrial Zone, 3rd Liuxian Road, Bao’an District,
Shenzhen, 518101,P.R.China
Tel：[phone]
E-mail：sa[email protected]m
http://www.siglent.com

General Safety Summary
Review the following safety precautions to avoid personal injuries and prevent damages
to this product or any products connected to it. To avoid potential hazards, use this
product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or Personal Injuries
Use Proper Power Cord. Use only the power cord specified for this product and
approved by your local governing agencies.
Avoid Electric Shock. To avoid injuries or potential loss of life, do not connect or
disconnect probes or test leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the protective ground conductor
of the power line. To avoid electric shock, the grounding conductor must be connected
to the earth ground. Make sure the instrument is grounded correctly before connecting
its input or output terminals.
Connect the Probe Properly. Do not connect the probe ground lead to a high voltage
since it has the isobaric electric potential as ground.
Observe All Terminal Ratings. To avoid fire or shock hazard, observe all ratings and
markings on the instrument and check your manual for more information about ratings
before connecting.
Use Proper Fuse. Use only the specified fuse.
Do Not Operate Without Covers. Do not operate this instrument with covers or panels
removed.
Avoid Circuit or Wire Exposed. Do not touch exposed junctions and components
when the unit is powered.
Do Not Operate With Suspected Problems. If you suspect damage has occurred to
this instrument, have it inspected by qualified service personnel before further operation.
Any maintenance, adjustment or replacement, especially to the circuits or accessories
should be performed by SIGLENT authorized personnel.
Keep Product Surfaces Clean and Dry.
Do Not Operate in Wet/Damp Conditions. To avoid electric shock, do not operate the
instrument in wet or damp conditions.
Do Not Operate in an Explosive Atmosphere. To avoid injuries or fire hazards, do not
operate in an explosive atmosphere.
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 may be potentially accessible.
CAUTION: Indicates damage to the instrument or other property may occur.
Symbols on the Product. These symbols may appear on the product:

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Contents
General Safety Summary ...................................................................................................III
General Features.................................................................................................................7
Prepare Information.............................................................................................................9
Functional checking......................................................................................................9
Power-on Inspection .............................................................................................9
Probe Compensation ..........................................................................................10
Auto Setup...........................................................................................................11
Self Calibration....................................................................................................12
Interface Test..............................................................................................................12
USB Host Test.....................................................................................................13
USB Device Test.................................................................................................13
LAN Port Test......................................................................................................15
Pass/Fail out Test................................................................................................17
Performance Test ..............................................................................................................19
To Verify DC Gain Accuracy ......................................................................................23
To Verify Offset Accuracy...........................................................................................25
To Verify Time Base Accuracy...................................................................................27
To Verify Trigger Delay...............................................................................................27
To Verify Ext Trigger Delay........................................................................................28
To Verify Ext Trigger Level.........................................................................................29
To Verify Noise Floor..................................................................................................30
To Verify Bandwidth ...................................................................................................31
To Verify Bandwidth Limit...........................................................................................32
To Verify Trigger Sensitivity .......................................................................................33
To Verify Input Impedance.........................................................................................35
Disassembly Procedures...................................................................................................36
Safety Consideration and Cautions............................................................................36
Tools Lists...................................................................................................................36
Disassembly Procedures............................................................................................37
To Remove the Front-Panel Knobs....................................................................37
To Remove the Rear Cover................................................................................38
To Remove the Rear Metal Shield......................................................................39
To Remove the Power Supply Module and the Fan...........................................40
To Remove the Front Cover................................................................................41
To Remove the Main Board................................................................................42
To Remove the LCD and Keyboard....................................................................44
Solving General Problems.................................................................................................45
If there is no display....................................................................................................45

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If the display stuck at logo graph................................................................................45
If there is no trace display ..........................................................................................45
If the baseline trace drift out of specification..............................................................45
If there is an unexpected trace when no input connected to channel input...............46
Troubleshooting.................................................................................................................47
Safety Consideration and Cautions............................................................................47
Required equipment...................................................................................................47
Troubleshooting Flowchart.........................................................................................48
Main Board Drawings.................................................................................................49
To Check the Power Supply Module..........................................................................49
To Check the Main Board...........................................................................................50
To Check the Processor System................................................................................50
To Check the Acquisition System...............................................................................52
To Check Other Power Supplies................................................................................53
To Check the LCD......................................................................................................53
Contact SIGLENT..............................................................................................................56

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General Features
SIGLENT’s new SDS2000X-E Super Phosphor Oscilloscopes are available in two
bandwidths, 200MHz and 350MHz, a single ADC with a 2GSa/s maximum sample rate,
and a single memory module with 28Mpts of sample memory. When two channels are
enabled, each channel has sample rate of 1GSa/s and a standard record length of 14Mpts.
When only a single channel per ADC is active, the maximum sample rate is 2GSa/s and
the maximum record length is 28Mpts. The most commonly used functions can be
accessed with its user- friendly front panel design.
The SDS2000X-E series employs a new generation of SPO (Super-Phosphor
Oscilloscope) technology that provides excellent signal fidelity and performance. The
system noise is also lower than similar products in the industry. It comes with a minimum
vertical input range of 500uV/div, an innovative digital trigger system with high sensitivity
and low jitter, and a waveform capture rate of 400,000 frames/sec (sequence mode). The
SDS2000X-E also employs a 256 -level intensity grading display function and a color
temperature display mode not found in other models in this class. SIGLENT’s latest
oscilloscope offering supports multiple powerful triggering modes including serial bus
triggering. Serial bus decoding for IIC,SPI,UART,CAN,LIN bus types is included. The
SDS2000X-E also include History waveform recording, and sequential triggering that
enable extended waveform recording and analysis. Another powerful addition is the new
1million point FFT math function that gives the SDS2000X-E very high frequency
resolution when observing signal spectra. The new digital design also includes a hardware
co-processor that delivers measurements quickly and accurately without slowing
acquisition and front-panel response. The features and performance of SIGLENT’s new
SDS2000X-E cannot be matched anywhere else in this price class.
The SDS2000X-E includes even more functions, including: searching and navigating,
on-screen Bode plot, 16 digital channels(Option), an external USB powered 25 MHz AWG
module(Option), a USB WIFI adapter(Option), and an embedded application that allows
remote control via web browser.
Table 1 General features
Model
SDS2202X-E
SDS2352X-E
Bandwidth
200 MHz
350 MHz
Sampling Rate(Max.)
A single 2GSa/s ADC. When two channels are enabled, each
channel has a maximum sample rate of 1GSa/s. When a
single channel per pair is active, that channel has sample rate
of 2GSa/s
Channels
2+EXT
Memory Depth(Max.)
14Mpts/CH(non-interleave mode);
28Mpts/CH(interleave mode)
⚫200MHz, 350MHz bandwidth models

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⚫Have one 2GSa/s ADC. When all channels are enabled, each channel has a maximum
sample rate of 1GSa/s. When a single channel per ADC is active, it has sample rate of
2GSa/s
⚫The newest generation of SPO technology
⚫Waveform capture rate up to 110,000wfm/s (normal mode), and 400,000wfm/s
(sequence mode)
⚫Supports 256-level intensity grading and color display modes
⚫Record length up to 28Mpts
⚫Digital trigger system
⚫Intelligent trigger: Edge, Slope, Pulse Width, Window, Runt, Interval, Time out (Dropout),
Pattern
⚫Serial bus triggering and decoding (Standard), supports protocols IIC, SPI, UART,
RS232,CAN,LIN
⚫Video trigger, supports HDTV
⚫Low noise floor with voltage scales from 500μV/div to 10V/div
⚫10 types of one-button shortcuts, supports Auto Setup, Default, Cursors, Measure, Roll,
History, Display/Persist, Clear Sweep, Zoom and Print
⚫Segmented acquisition (Sequence) mode, divides the maximum record length into
multiple segments(up to 80,000), according to trigger conditions set by the user, with a
very small dead time segment to capture the qualifying event.
⚫History waveform record (History) function(maximum recorded waveform length is
80,000 frames)
⚫Automatic measurement function for 38 parameters as well as Measurement Statistics,
Zoom, Gating, Math, History and Reference functions
⚫1Mpts FFT
⚫Math and measurement functions use all sampled data points (up to 28Mpts)
⚫Math functions (FFT, addition, subtraction, multiplication, division, integration,
differential, square root)
⚫Preset key can be customized for user settings or factory “defaults”
⚫Security Erase mode
⚫High Speed hardware based Pass/ Fail function
⚫16 Digital channels (MSO) (Option)
⚫Bode plot
⚫Search and navigate
⚫USB AWG module (Option)
⚫USB WIFI adapter(Option)
⚫Web Browser based control
⚫Large 7 inch TFT-LCD display with 800 * 480 resolution
⚫Multiple interface types: USB Host, USB Device (USB-TMC), LAN Pass / Fail, Trigger
Out
⚫Supports SCPI remote control commands
⚫Supports Multi-language display and embedded online help

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Prepare Information
Before initiating performance verification or any adjustments, it is recommended the user
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 self-calibration routine
⚫How to recall factory Default settings
For more detailed information about oscilloscope operation, please refer to the Quick Start
Guide.
Functional checking
The functional checking details four types of checks used to determine if the oscilloscope
is operating properly.
Power-on Inspection
The power requirements of the oscilloscope are 100-240 V, 50/60Hz or 100-120 V, 400Hz.
Please use the power cord supplied with the accessories to connect the oscilloscope to
the power source.
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.
Press the power-on button located at the lower left corner of the front panel and note that
several oscilloscope keys will be lighted for about 6 seconds simultaneously, until the boot
screen appears. The oscilloscope will then begin to perform its power-on tests
Power
socket

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automatically, after which the Default button can be pressed in order to recall the factory
default settings.
Probe Compensation
It is necessary to compensate the probe at first use so as to properly match the probe to
the oscilloscope’s input channel. Non-compensated or poorly compensated probes may
cause measurement inaccuracies or errors. The probe compensation steps are as
follows:
1.Set the attenuation switch on the probe to 10X.
Figure 2 Set the attenuation switch
2.Connect the alligator clip of the probe to the Ground Terminal on the front panel, and
then use the probe to connect CH1 BNC input connector to the Compensation Signal
Output Terminal.
3.Press Auto Setup.
4.Observe waveform on the screen. The displaying should be a square waveform as
shown in the figure below:
Under Compensated Over
Compensated Correctly Compensated
5.If the waveform does not show as “compensated correctly”, use a nonmetallic
screwdriver to adjust the low-frequency compensation adjustment hole on the probe
until the waveform displays correctly.
Ground Terminal
Compensation Signal Output Terminal

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Auto Setup
Press the Auto Setup key to enable the waveform auto setting function. The oscilloscope
will automatically adjust the horizontal time base, vertical scale and trigger mode
according to the input signal to obtain an optimum waveform display.
⚫The input signal frequency must be higher than 20 Hz, with the amplitude greater than 8
mV.
⚫Select the channel with the lowest frequency when several channels are connected to
signals.

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Self Calibration
The self-calibration program can quickly make the oscilloscope reach the best working
state to get the most precise measurement values. You can perform self-calibration at any
time especially when the change of the environment temperature is up to or more than
5 ℃. Make sure that the oscilloscope has been warmed up or operated for more than 30
minutes before the self-calibration.
Do the following steps to do self calibration:
1.Disconnect all the input channels.
2.Press the Utility button on the front panel, and then press the Do Self Cal softkey,
and the oscilloscope will pop-out the message box shown as below:
Figure 3 Calibration Interface
3.Press the Single button on the front panel to perform the self calibration program.
During the calibration, most of the oscilloscope’s keys are disabled.
4.When the self calibration process is completed, the following message will appear:
“Press Run/Stop key to exit”. Press the Run/Stop button on the front panel to exit the
calibration interface.
Interface Test
The SDS2000X-E series oscilloscope is designed with four standard interfaces: USB Host,
USB Device, LAN and Pass/Fail. Connecting to other instruments via these interfaces
enables the oscilloscope to achieve additional capabilities. In order to ensure the
oscilloscope is operating properly it is recommended that the user first test the interfaces.

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USB Host Test
To test whether the USB Host interface is operating correctly.
Tools:
●A U disk
Steps：
1.Insert a U disk (flash drive) into the USB Host interface on the front panel of the
oscilloscope.
2.A message prompt “USB Flash Drive Detected.” appears on the screen, and an icon will
be shown in the lower right corner of the screen which confirms the U disk has been
successfully recognized.
Figure 4 USB drive in interface
USB Device Test
To test if the USB Device interface operating correctly.
Tools：
●A computer with USB interface
●A standard USB cable (Type AB)
●NI Max software
Steps：
1.Set up NI Max software in a computer and Install the driver step by step following the
instructions.
2.Connect the oscilloscope to the computer using an USB cable.

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3.Run NI Max software. Click “Device and Interface” at the upper left corner of the NI
software interface and immediately the “USBTMC” device symbol is displayed.
4.Click “Open VISA Test Panel” option button, and then the following Interface will appear.
Next, click the “Input/Output” option button and click the “Query” option button in order
to view the Read operation information.

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LAN Port Test
Use to test if the LAN interface operates correctly when connected with NI Visa software.
Tools：
⚫A computer with LAN interface
⚫A standard LAN cable
⚫NI Max software
Steps：
1.Set up NI Max software in a computer and install the driver using the following
instructions.
2.Press Utility NextPage2/4 I/O LAN IP Set, input usable IP Address and
Subnet Mask.
Figure 5 IP Setting interface
3.Connect the oscilloscope to the computer using a LAN cable via the LAN interface
ports.
4.Run NI Max software. Click “Device and Interface” at the upper left corner of the NI
software interface and select the “LAN” device symbol.

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5.Click “Open VISA Test Panel” option button, which then displays the following interface
(below). Then click the “Input/Output” option button and click the “Query” option button.
The Read operation information will be displayed.

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Pass/Fail out Test
To test the Pass/Fail function and signal output by viewing on a second oscilloscope.
Tools：
⚫A second oscilloscope
⚫Two BNC cables
Steps：
1.Turn on the SDS2000X-E oscilloscope.
2.Enable Channel 1.
3.Press Utility Next Page2/4 Pass/Fail, set the submenu items under Pass/Fail
menu as below:
Table 2 Pass/Fail submenu items
Submenu
Setting
Enable Test
On
Source
CH1
Msg Display
On
Mask setting
X Mask
Y Mask
0.32div
0.32div
Note: Remember to press “Create Mask” to complete Mask setting, after x mask setting
and y mask setting.
After selecting the corresponding items as shown in the table above, the SDS2000X-E
screen will appear as in Figure 6:
Figure 6 Pass/Fail Waveform

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If the waveform is within the range that was set under Mask menu setting, the waveform
displayed on the screen will Pass. If any part of the trace falls outside the Mask area then
it will Fail.
4.Connect the Pass/Fail output signal (on the rear panel) to the input terminal of another
oscilloscope.
5.Move the waveform on the screen up, down, or sideways so that any portion of it falls
outside of the Pass/Fail mask. If the interface is operating normally then a pulse will
appear on the second oscilloscope (Figure 7). Adjust the second oscilloscope’s time
base and voltage scale as needed. If there is no viewable pulse on the second
oscilloscope then there may be a problem with this function.
Figure 7 Pulse Waveform

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Performance Test
This chapter explains testing the oscilloscope in order to verify performance specifications.
For accurate test results, please let the test instruments and the oscilloscope warm up 30
minutes before testing.
Below is the required equipment for the test:
Table 3 Test equipment
Equipment
Description
Test item
Fluke 9500B + Active Heads
High Performance
Oscilloscope Calibrator
DCG\Offset\ Clock
accuracy\Trigger delay
\BW\BWL\trigger
sensitivity\ Input
impedance\ Ext Trigger
delay\Ext Trigger level
GPIB Card and Cable
For communication between
the computer and the 9500B
USB Cable
For communication between
the computer and the
SDS2000X-E
BNC Cables
BNC(m) to BNC(m),
Approx.1m long
BNC T Connectors
For signal distribution
DCG\Offset\Ext Trigger
level
Terminal Load
50 ohm
Ext Trigger delay\
BW\BWL\trigger sensitivity
Computer
The figures below show the interconnections between the test equipment and PC to the
oscilloscope under test (Table 3):
PC
GPIB USB
9500B
CH1
BNC CABLE
SDS2000X-E
CH
1CH
2
SDS2000X-E

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Figure 8 Connecting test instruments for DCG\Offset
PC
CH
1CH
2
SDS2000X-E
GPIB USB
9500B
CH1
BNC CABLE
Figure 9 Connecting test instruments for Clock\Trigger Delay
CH
1CH
2
SDS2000X-E
9500B
CH1
PC
GPIB USB
BNC CABLE
Figure 10 Connecting test instruments for BW\BWL\Trigger Sensitivity
CH
1CH 2EXT
SDS2000X-E
PC
9500B
CH1
GPIB USB
BNC CABLE
Figure 11 Connecting test instruments for Input impedance
The figures below show the interconnections between the test equipment and PC to the
SDS2000X-E for Ext Trigger test: