Service Manual - Mikrocontroller.net
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3. 00 0000 00 0000 00 000 Table 4 2 Removing the handle Removing steps Pull down the handle hard from the two sides of the generator To install the handle please operate as the reverse steps SDG1000 Service Manual 37 S SIGLENT Removing the Metal Shell and Rear Cabinet N qa OO o PF Table 4 3 Removing the rear cabinet screws HL L oc u U y g l J T gt Table 4 4 Removing the metal shell screw 38 SDG1000 Service Manual G SIGLENT siglent technologies Removing steps 1 Remove the two screws from the rear cabinet of the generator using a PH2 philips screw driver 2 Remove the screw from the bottom of the generator using the screw driver 3 Remove the rear cabinet and metal shell from
4. 100 MHz 200 MHz 100m Vrms 5 Vpp Pulse width and dut e a 1 Hz 10 MHz 100 mVpp 10 Vpp measurement Input impedance 1 MQ Input adjustment Coupling methods AC DC High frequency rejection ON OFF Trigger level range 3V 1 8V 6 SDG1000 Service Manual S SIGLENT General Specifications Display Display type Resolution Color depth Contrast typical value Backlight typical Power intensity Voltage Consumption Fuse Environment Temperature Cooling method Temperature range Altitude Others Dimension Weight IP protection IP2X Calibration Cycle 1 year SDG1000 Service Manual 3 5 TFT LCD 320xRGBx240 24 bit 350 1 300cd m 100 240 VACrus 45 66 Hz CATII 100 127 VACrms 45 440 Hz CATII lt 30W 1 25A 250V Operation 0 C 40 C Storage 20 C 60 C natural cooling down Below 35 C lt 90 relative humidity 35 C 40 C lt 60 relative humidity Operation below 3 000 meters Storage below 15 000 meters Width 229mm Height 105mm Depth 281mm N W 2 6 Kg G W 3 4 Kg S SIGLENT Quick Start One of the first things you will want to do with your generator is to become acquainted with the front panel We have written the exercises in this chapter to prepare the instrument for use and help you get familiar with some of its front panel operations This chapter is divided into the following sections e To Prepare the Gene
5. 300 kHz Pulse 500uHz to 10MHz White Noise 50MHz bandwidth 3dB Arbitrary 14 Hz to SMHz 5 standard waveforms Sine Square Ramp Pulse Noise Self defined arbitrary waveform Multiple modulation function various modulated waveform AM DSB AM FM PM ASK FSK Sweep and Burst Multiple I O external modulation source external 10 MHz reference input external trigger source waveform output synchronous signal output Support USB storage device Software updating could also be performed using USB devices Up to 16k sample points of internal waveform depth which can rebuild or simulate any complex waveform Remote control is realized using the USB cable Multiple interfaces USB host amp device Support the seamless connection with SIGLENT Series Digital Oscilloscopes Be able to directly read and rebuild the stored waveform in the oscilloscopes 2 languages English and Chinese user interface and built in help system Note All the specifications described in this manual are according to VI SDG1050 SDG1000 Service Manual 5 SIGLENT The Front Panel at a Glance le Ha meg A ITE y pa y d 4 L A 9 1 i EE a S B 14 13 12 11 10 No Description No Description 1 ON OFF Switch 8 Direction Keys 2 USB Host 9 Output Control Keys 3 LOGO 10 BNC Connectors 4 Model 11 Function Keys 5 Menu ON OFF Switch 12 Waveform Selection Keys 6 Digital Keypad 13 Menu Operation Keys T Universal Knob 14 LCD Dis
6. AUTO on the front panel of the oscilloscope to obtain a perfect displaying Select the Dut to display duty under Time measurement in MEASURE system 4 Change the duty to 80 and measure it on the oscilloscope in the same way as step 3 5 Remove the BNC cable to CH2 output and perform the same verification as Channel Channel Duty Cycle The Spec range 19 21 1 79 81 2 19 21 2 79 81 6 Compare the measured duty to the spec range shown in the table above 26 SDG1000 Service Manual S SIGLENT Frequency Response Verification This test checks if the value in dB format translated from output amplitude is within the spec range response to different frequency using a Power Meter 1 Turn on the generator and choose CH1 as the operating channel Set the load to 500 in OUTPUT SETUP system under the Utility menu 2 Connect the Power Meter PC and generator as shown below USB cable USB cable Power Meter BRC End 3 Select Sine waveform of the generator and set the amplitude to 1V and 2 5V frequency to the values listed below in sequence Output Voltage eof Frequency CH1 CH2 the Spec Range CH1 CH2 the Spec Range dBm dBm 10KHz 3 8794 4 0794 3 8794 4 0794 8794 4 0794 NE 84 12 04 100KHz NN 3 8294 4 1294 11 79 12 09 1MHz MID 3 8294 4 1294 MO 11 79 12 09 5MHz IDO 3 6794 4 2794 o 11 64 12 24 10MHz MID 3 6794 4 2794 NDA 11 64 12 24 mc
7. ES TRS mun T Rans E 25MHz 3 6794 4 2194 11 64 12 24 E AA a SOMHz 3 6794 4 2794 11 64 12 24 EA PAR ee 4 Remove the BNC cable to CH2 output and perform the same verification as Channel 5 Compare the value measured from Power Meter to the spec range shown in the table above SDG1000 Service Manual 27 S SIGLENT AC Amplitude Verification This test checks the ac amplitude output accuracy at the frequency of 100 kHz using a Power Meter 1 Turn on the generator and choose CH1 as the operating channel Set the load to 500 in OUTPUT SETUP system under the Utility menu 2 Connect the Power Meter PC and generator as shown below USB cable Power Meter BRC End a JODO 3 Select Sine waveform of the generator and set the amplitude to the values listed below in sequence Amplitude CH1 dBm CH2 dBm the Spec Range dBm 40mv 24 50 23 46 2V 9 69 10 3 By 17 65 18 26 4 Remove the BNC cable to CH2 output and perform the same verification as Channel 5 Compare the value measured from Power Meter to the spec range shown in the table above 28 SDG1000 Service Manual S SIGLENT General Adjustment Procedure This chapter explains how to adjust the SDG1000 series generator for optimum operating performance The following contents are the four adjustment steps o Feedback channel Adjustment which act as a standard calibration module providing the accurac
8. of the specifications listed in chapter 1 as the verification limits 24 SDG1000 Service Manual S SIGLENT DC Output Verification This test checks if the DC offset listed in the table below are within the spec range using a DMM 1 Set the DMM to measure DC voltage Connect the DMM to the channel 1 output of the generator as shown below 2 Turn on channel 1 and select DC system under the Utility menu 3 Set the instrument to each output value described in the table below and measure the output voltage with the DMM Be sure the generator output impedance is set to High Z and the output is enabled DC Offset Omv 10mv 100mv 1v 3V 10v 10mv 100mv 1v 3V 10v 1 3mv Sy Bm 68m 13 my Pm 404m 0 887 1 0189 Sf 967v 3 033 pf 8970 10 1030 tty 6 8m 10 amy BR St Ot 0 9870 8 083 2 9670 pf 210 103 9 897 v 4 Compare the measured voltage to the spec range shown in the table above SDG1000 Service Manual 25 S SIGLENT Duty Cycle Verification for Square This test checks if the Square Duty Cycle listed in the table below is within the spec range using a digital oscilloscope 1 Turn on the generator and choose CH1 as the operating channel Select Square waveform and set the frequency to 100 kHz amplitude to 4Vpp duty to 20 2 Turn on the digital oscilloscope and connect it to the CH1 output of the generator as shown below i a 9 9 99 JOO 3 Press
9. performing the power supply testing procedure please make sure that the generator is grounded correctly through the protective lead of the power cord Take care not to touch or even disassemble the power supply module without any safety precautions or you may probably suffer from electric shock or burn Here are procedures for testing the power supply 1 Disconnect the power cord of the generator and then check whether the fuse has been burnt out 2 Remove metal shell of the generator using a driver and then disconnect the power connector connected to the main board 3 Focus on the Power Connector which contains 6 pins from Pin1 to Pin6 Since two of the six pins are ground wire you can respectively test the other four pins marked with blue yellow red and white to check whether the voltage value is within the corresponding specified range using a digital multimeter The voltage parameters to be tested are listed in table below Table 5 2 Voltage parameters of the power connector y Vs ELEC sav vie If each tested voltage value is within the corresponding spec range referring to the table above then the power supply works normally Otherwise it proves to be faulted please return it to the factory to have it repaired or contact SIGLENT Note The main power supply provides an input fuse to protect against the danger of fire in the event of a failure of the power supply circuitry However this fuse will not fail open o
10. softkey The displayed symmetry is either the power on value or the percentage previously selected The duty cycle represents the amount of time per cycle that the Ramp wave is at a Rise time note the icon on the up side of the display 3 Input the desired symmetry Use digital keypad to input the value directly enter the value 60 then press the corresponding softkey to select the desired unit Y LHZ Ramp CH1 Ramp CHi Waveform SDG1000 Service Manual 15 S SIGLENT Generate a Pulse Waveform You can set the generator to output a pulse waveform with variable width and delay time The following steps show you how to generate a 500 us pulse waveform with a pulse width of 100 us and delay time of 50 ns 1 Select the pulse function Press the button to select the pulse function and output a pulse waveform with the default parameters 2 Set the Pulse period Press the Period softkey and then set the pulse period to 500 us 3 Set the Pulse Width Press the PulWidth softkey and then set the pulse width to 100 us The pulse width represents the time from the 50 threshold of the rising edge to the 50 threshold of the next falling edge 4 Set the Pulse Delay Press the Delay softkey and then set the pulse delay to 50 ns CHZ Pulse CHi Pulse CHi Waveform 16 SDG1000 Service Manual S SIGLENT Configure a Noise Waveform You can set the generator to output a noise waveform with variance and mean The
11. 2 Check if the power button is usable 3 Check whether the fuse has been burnt out If the fuse needs to be changed please contact SIGLENT as soon as possible and return the instrument to the factory to have it repaired by qualified personnel 4 Check if the power connector is properly connected to the main board 5 If the instrument still does not work normally please contact SIGLENT 2 The instrument starts up with a dark screen 1 Check if the power connector is properly connected to the main board 2 Test if the voltages on the test points marked 5V and LED ANODE are within the spec range 3 If the instrument still does not work normally please contact SIGLENT 3 No response after pressing any button or abnormal display of the screen 1 Check if the two end of the connector between the keypad circuit board and the main board is properly connected 2 If the instrument still does not work normally please contact SIGLENT 4 The output frequency measured on the oscilloscope is incorrect 1 Check if the frequency on the test point marked T4 is correct 2 Refer to Check the Main Board or contact SIGLENT SDG1000 Service Manual 51 S SIGLENT Maintenance Maintain Summary SIGLENT warrants that the products it manufactures and sells are free from defects in materials and workmanship for a period of three years from the date of shipment from an authorized SIGLENT distributor If a p
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13. Adjustment oocoocccocncocccocncocnccnconnconocononanonannnoos 30 X SDG1000 Service Manual S SIGLENT Channel Self AdjuStMent oocccccoccccoccconcccnccononononcnnoronanocanonanonnnss 31 Square AdjuStMent ocoooccocccocnconoconoconcncncnnnnonocononanonononrnnanonnnonanenans 32 Frequency Response Adjustment see eee eee 33 ASSEMDIVIPLOCOQUES Someta toner EERTE EAE EAT ENEAS 34 Security Consideration occcoccconcccnoccncocncononnnonononanonnnnnronanonanenannaness 34 USE ON VIO GUNS es sccectcrceaae steeaeduategecaatewecctaseane amedueeedeedumeageseragiesaneseecaas 35 Kile UTs H HOON Sri 35 Disassembly Procedures oocoococccconcoccconconnonocononncconoononancononnncnnnnnos 35 A view of the whole Instrument eee ee ee e eee eee 36 Removing the Handle ooccoccconcoccoccconoonocononncconconocanonnonncnncconennnnns 3 Removing the Metal Shell and Rear Cabinet esec eee 38 Removing the Front Cabinet eee eee ee ee ee ee 40 Removing the Display Module sese 41 Removing the Main Body sese ee eee eee 43 WROUIGI SG SANOO MING sisi 45 ESDP OCON actora 45 REQquIFSd EQUIPMENTS inn EES AREA aa 45 Main Board DraWiNg isccscosenssccsangtecndtandcetesdastonsconetanccendaatddesdicadsdsetencsenetecss 46 Check the Power Supply eee ee e eee eee e 48 Check the Mam Board sorna tna corona 49 Quick Guide for General Failures oocococcconccconncococonncennnonnncncnnnonononos 51 Mate ye ee nseries 52
14. Malta SUMMA cco EEE Eae 52 Repackaging for ShipMent occcocccoccconcconcconconcconocononononanenanonanconecanenanes 53 GOMtact LENTE ere E 54 SDG1000 Service Manual xI SIGLENT Specification These specifications apply to SDG1000 series Arbitrary Waveform Generator To verify that an oscilloscope meets specifications it must first meet the following conditions e The generator must have been operating continuously for fifteen minutes within the specified operating temperature e You must perform the Self Adjust operation accessible through the Utility menu if the operating temperature changes by more than 5 C e The oscilloscope must be within the factory calibration interval of one year Specifications Model SDG1005 SDG1010 SDG1020 SDG1025 SDG1050 Max output 5SMHz 10MHz 20MHz 25MHz 50MHzZ frequency Output channels 2 Sample rate 125 MSa s Arbitrary 16 kpts waveform length Frequency resolution 1 uHz vertical resolution 14 bits Waveform Sine Square Ramp Pulse Gaussian Noise 46 types of built in arbitrary waveform Sine 14 Hz 5MHz 1U4Hz 10MHz 1u4Hz 20MHz Tuz 25MHZ 1puHz SOMHz Square 14 Hz 5MHz 1u4Hz 10MHz 1u4Hz 20MHz 1puHz 25MHz 1puHz 25MHz Pulse 5004 Hz 5MHzZ 5004Hz 10MHz Ramp Triangular 14 Hz 300KHz Gaussian white noise SMHz 3dB 10MHz 3dB 20MHz 3dB 25MHz 3dB SOMHz 3dB Arbitrary waveform 1uHz SMHz Modulation AM DSB AM FM PM FSK ASK PWM Sweep Burst Frequency coun
15. Service Manual SDG1000 Series Function Arbitrary Waveform Generator 2013 SIGLENT TECHNOLOGIES CO LTD S 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 e 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 o Information in this publication replaces all previously corresponding material e Any way of copying extracting or translating the contents of this manual is not allowed without the permission of SIGLENT eo 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 15014001 2004 standard Other international standard conformance certification is in progress SDG1000 Service Manual S SIGLENT General Safety Summary Carefully read the following safety precautions to avoid person injury and prevent damage to the instrument or any products connected to it To avoid potential hazards please use the instrument as spec
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17. bitrary waveform interface You will see the mathematic waveform as below CHZ CHi Waveform 3 Output the exponential fall waveform Use the knob to select the ExpFall waveform and press the Select softkey The waveform is output using the present settings for frequency amplitude and offset unless you change them CHZ CHi Waveform SDG1000 Service Manual 19 S SIGLENT Use the Built In Help System The built in help system is designed to provide context sensitive assistance of some functions A list of help topics is also available to assist you with several operations 1 View the help information for SDG1000 Press button you will see the list of help topics Use the konb and directional keys to select the help title Then press the Select the help information softkey to view 2 Press button or any function button to exit help system 20 SDG1000 Service Manual S SIGLENT Calibration This calibration procedure contains performance verification procedure and adjustment procedure After receiving a generator you should firstly verify if its performance applies to the limits and then perform adjustment in case of abnormal testing results Calibration Interval The instrument should be calibrated on a regular interval determined by the measurement accuracy requirements of your application A 1 year interval is adequate for most applications Accuracy specifications will remain valid only if adjustm
18. dures is listed below If the exact instrument is not available substitute calibration standards of equivalent accuracy dc volts Digital Multimeter DMM accuracy 100ppm Agilent 34401A resolution 100 u V Frequency Power Meter 10KHz to SOMHz Agilent U2004 GPIB cable ps GPIB IEEE 488 Frequency Counter Accuracy 1ppm A Digital Oscilloscope Bandwidth 100MHz Agilent MSO7012B Test Considerations For optimum performance all procedures should comply with the following recommendations Assure that the calibration ambient temperature is stable and between 18 C and 28 C Ideally the calibration should be performed at 23C TTC e Assure ambient relative humidity is less than 80 e Allow a half an hour warm up period before verification or adjustment o Keep the measurement cables as short as possible consistent with the impedance requirements o Usea502 cable 22 SDG1000 Service Manual S SIGLENT Performance Verification Test Use the performance verification tests to verify the measurement performance of the instrument The performance verification tests use the instrument s specifications listed in the Specifications chapter You can perform two different levels of performance verification tests eo Self Adjust A series of internal verification tests that give high confidence that the instrument is operational o Performance Verification Tests An extensive set of tests that are recommended as an accep
19. e The following steps show you how to change the amplitude to 100mVrms 1 Press the Ampl HLevel softkey The displayed amplitude is either the power on value or the amplitude previously selected When you change the function the same amplitude is used if the current value is valid for the new waveform If you want to set the HLevel for the waveform press the softkey again to switch the HLevel parameter The current operation is displayed in inverse color 2 Input the desired amplitude Use the digital keypad to input the value directly enter the value 100 CHZ Sine CH1 Unit CHi Waveform Then press the corresponding softkey to select the desired unit For example press mVrm CHZ Sine CH1 Sine CHi Waveform Note You can also enter the desired value using the knob and direction keys 12 SDG1000 Service Manual 5 SIGLENT Set the DC offset The following steps show you how to change offset to 2mVdc 1 Press the Offset LLevel softkey The displayed offset is either the power on value or the offset previously selected When you change the function the same offset is used if the current value is valid for the new waveform If you want to set the LLevel for the waveform press the softkey again to switch the LLevel parameter The current operation is displayed in inverse color 2 Input the desired offset Use the digital keypad to input the value directly enter the value 2 CHZ Sine CH1 Unit CH
20. e waveform amplitude will decrease as the input frequency increases it is essential to compensate for the amplitude to match it to the frequency 1 Turn on the generator and connect it to PC using a USB cable 2 Connecting the USB end of the Power Meter to the USB port of the PC upon which the Power Meter indicator light will be brightened Only after the indicator light goes out from red could it be connected to the generator output 3 Open the Easy Test software on the desktop and run the corresponding script prepared previously In about 10 seconds the prompt message will display on the screen to indicate you to connect the Power Meter After the generator completes adjustment for channel 1 the prompt message displays on the screen will indicate you to remove the BNC cable to channel 2 to start adjustment USB cable Power Meter BRC End 4 After the two channel adjustment completed please disconnect all connections SDG1000 Service Manual 33 5 SIGLENT Assembly Procedures This chapter describes how to remove the major modules from the SDG1000 series Generator To install the removed modules or replace new modules please follow corresponding operating steps in reverse order The following contents are what mainly included in this chapter e Security Consideration which describes security information needed to considerate while operating e List of Module in which the modules to remove are listed Oo Requ
21. edback channel and signal channel this adjustment helps to obtain the actual working performance for components from signal channels 1 After the feedback channel adjustment completed disconnect the two BNC cables on channel 1 and channel 2 2 Select Self Adjust to perform the channel Self Adjustment in Test Cal system under the Utility menu 3 Once the Self Adjust begins the generator turns to adjustment interface and the progress bar displays on the screen In about 15 seconds it will reach to 100 which indicates completing of the self adjust You could press any functional button to exit SDG1000 Service Manual 31 S SIGLENT Square Adjustment This procedure adjusts the square duty to limit its error in the range of 11 1 Connect the Digital oscilloscope PC and SDG1000 generator as shown below 2 Open the EasyTest software on the desktop and run the square adjustment script prepared previously After the generator completes adjustment for channel 1 the prompt message displays on the screen will indicate you to remove the BNC cable to channel 2 to start adjustment HSP cable Oscilloscope BNC cable 3 After the two channel adjustment completed please disconnect all connections 32 SDG1000 Service Manual S SIGLENT Frequency Response Adjustments This adjustment aims to obtain the actual frequency response characteristic of signal channel thus to perform appropriate compensation Since th
22. ely happen WARNING Indicates an injury or hazard that may not immediately happen CAUTION Indicates a potential damage to the instrument or other property that might occur Symbols used on the instrument Symbols may appear on the instrument A A O Hazardous Protective Warning Earth Ground Power Voltage Earth Ground Switch SDG1000 Service Manual lI S SIGLENT Overview for the Document The document is for SDG1000 series arbitrary waveform generator which will be mostly written as generator for short in the following text The main contents described in this manual are SDG1000 Series Generator at a glance This part introduces the main technology characteristics for SDG1000 generator The Front Panel at a glance This part introduces briefly all the buttons and the knob on the front panel The Rear Panel at a glance This part introduces all the ports for easy communication on the rear panel Specifications Chapter 1 lists the generator s specifications Quick Start Chapter 2 prepares the generator for use and helps you get familiar with a few of its front panel features Calibration Chapter 3 provides calibration verification and adjustment procedures for the generator Assembly Procedures Chapter 4 provides disassembly procedures for you to get an understanding of the structure of the generator thus to install or replace some needed modules or troubleshoot faults you encounter while operating it Troub
23. enerator is turned on Note If the power on Self test fails some error messages are displayed along with black screen See Chapter 6 for information on self test error codes and for instructions on returning the generator to SIGLENT for service SDG1000 Service Manual 9 5 SIGLENT Adjust the carrying Handle To adjust the position grasp the handle by the sides and pull outward Then rotate the handle to the desired position Pull the handle ahead for easy carrying Pull the handle down 10 SDG1000 Service Manual 5 SIGLENT Set the Output Frequency The following steps show you how to change the frequency to 1 5 MHz 1 Press the Freq Period softkey The displayed frequency is either the power on value or the frequency previously selected When you change the function the same frequency is used if the current value is valid for the new waveform If you want to set the period for the waveform press the softkey again to switch the period parameter The current operation is displayed in inverse color 2 Input the desired frequency Use the digital keypad to input the value directly enter the value 1 5 CHZ Sine CH1 Unit CHi Waveform Then press the corresponding softkey to select the desired unit For example press MHz CHZ Sine CH1 Sine CHi Waveform Note You can also enter the desired value using the knob and direction keys SDG1000 Service Manual 11 5 SIGLENT Set the Output Amplitud
24. ent is made at regular calibration intervals Accuracy specifications are not valid beyond the1 year calibration interval SIGLENT does not recommend extending calibration intervals beyond 2 years for any application Adjustment is Recommended Specifications are valid only within the period from the last adjustment Whatever calibration interval you select SIGLENT recommends that re adjustment should be always performed within the calibration interval This is necessary to ensure the accuracy of the performance data measured during the calibration interval Automating Calibration Procedures You can automate the complete verification and adjustment procedures outlined in this chapter if you have access to programmable test equipment You can program the instrument configurations specified for each test over the remote interface You can then enter read back verification data into a test program and compare the results to the appropriate test limit values You can also adjust the instrument from the remote interface Remote adjustment is similar to the local front panel procedure You can use a computer to perform the adjustment by first selecting the required function and range The adjustment command is sent to the instrument and then the adjustment is initiated over the remote interface SDG1000 Service Manual 21 S SIGLENT Recommended Test Equipment The test equipment recommended for the performance verification and adjustment proce
25. following steps show you how to generate a noise waveform with 2V variance and 1mV mean 1 Select the Noise function Press the button to select the noise function and output a noise waveform with the default parameters 2 Set the variance Press the Variance softkey and then set the variance to 1V 3 Set the mean Press the Mean softkey and then set the mean to 10mV CHZ Noise CHi Noise CHi Waveform SDG1000 Service Manual 17 5 SIGLENT Set the DC Voltage You can set the DC Voltage feature from the Utility Menu and then set a dc voltage as an Offset value The following steps show you how to set a dc voltage with 1Vdc 1 Select the Utility function Press the jUtility button to select the Utility function 2 Set the DC Voltage Press the DC ON softkey and then enter the DC value 1Vdc CHZ Direct Current Un Load Hi Z You can enter any dc voltage from 10Vdc to 10Vdc Only Channel 1 18 SDG1000 Service Manual 5 SIGLENT Output a Built In Arbitrary Waveform There are 48 built in arbitrary waveforms stored in non volatile memory The following steps show you how to output the built in exponential fall waveform from the front panel 1 Select the arbitrary waveform function Press the button to select the arbitrary waveform function Then press the softkey and press the softkey 2 Select the built in waveform Press the Built In softkey and press the math softkey to enter the ar
26. i Waveform Then press the corresponding softkey to select the desired unit For example press mVdc CHZ Sine CH1 Sine CHi Waveform Note You can also enter the desired value using the knob and direction keys SDG1000 Service Manual 13 S SIGLENT Set the Duty Cycle of a Square Wave At power on the duty cycle for square wave is 50 You can adjust the duty cycle from 20 to 80 for output frequencies up to 10 MHZ The following steps show you how to change the duty cycle to 30 1 Select the square wave function Press button and then select the desired output frequency to any value up to 10 MHz 2 Press the Duty softkey The displayed duty is either the power on value or the percentage previously selected The duty cycle represents the amount of time per cycle that the square wave is at a high level note the icon on the up side of the display 3 Input the desired duty Use digital Keypad to input the value directly enter the value 30 then press the corresponding softkey to select the desired unit CHZ square CH1 Square CH1 Waveforn 14 SDG1000 Service Manual S SIGLENT Set the Symmetry of a Ramp Wave At power on the Symmetry for Ramp wave is 50 You can adjust the symmetry from 0 to 100 The following steps show you how to change the symmetry to 60 1 Select the Ramp wave function Press button and then select the desired output frequency to any value 2 Press the Symmetry
27. ified Only qualified technician should perform service procedures Use Proper Power Line Use only the special power line of the instrument that approved by local state 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 sign instruction of the instrument Before connecting the instrument please read the manual carefully to gain more information about the ratings Not Operate with Suspected Failures If you suspect that there is a damage of the instrument please let a qualified service personnel check it Avoid Circuit or 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 lI SDG1000 Service Manual S SIGLENT Safety Terms and Symbols Terms used on the instrument Terms may appear on the instrument DANGER Indicates an injury or hazard that may immediat
28. ired Tool which describes the tools needed to perform the procedures eo Disassembly Procedures which describes in detail how to remove and install the modules Security Consideration Only qualified personnel should perform the disassembly procedures Whenever possible disconnect the power before you begin to remove or replace the modules Otherwise any personal injuries or damages to the components may occur Avoid Electric Shock Hazardous voltages exist on the LCD module and power supply module To avoid electrical shock you should firstly disconnect the power cord from the oscilloscope and then wait at least three minutes for the capacitors in the oscilloscope to discharge before you begin disassembly Preventing ESD Almost all electrical components can be damaged by electrostatic discharge ESD during handling Component damages can occur at electrostatic discharge voltages as low as 50 volts The following guidelines will help preventing ESD damage when servicing the instrument or any electronic device Disassemble instruments only in a static free work area Use a conductive work area to reduce static charges Use a conductive wrist strap to reduce static charge accumulation 34 SDG1000 Service Manual S SIGLENT Minimize handling Keep replacement parts in original static free packaging Remove all plastic foam vinyl paper and other static generating materials from the immediate work area Use only an
29. leshooting Chapter 5 provides troubleshooting procedures for the internal main board and power supply board as well as the quick guide for general troubles Before any operation you should read the ESD Precautions to avoid personal injuries or damages to the generator Maintainance Chapter 6 provides information on maintenance daily care and unpacking inspection of the instrument The contact information is attached in the end in case of some unsolvable troubles you encounter IV SDG1000 Service Manual S SIGLENT Convention for the whole Contents All the description for function and performance in this document are according to SDG1050 series generator and apply to generator of the other types The SDS1000 series contains the following types nana Rael SDG1010 10 MHz SDG1020 20 MHZ SDG1025 25 MHz SDG1050 90 MHZ SDG1000 Service Manual V S SIGLENT SDG1000 Series at a Glance The SDG1000 series is a direct digital synthesized waveform generator with built in arbitrary waveform and pulse capabilities Its combination of excellent system features easiness in usage and versatile functions makes this generator a perfect solution for your testing now and in the future Characteristics DDS technology provides precise stable and low distortional output signal 3 5 TFT color LCD display 125MSa s sampling rate 14 bit resolution Frequency characteristics Sine 1uHz to 50 MHz Square 1uHz to 25 MHz Ramp 1uHz to
30. oints listed in the table above the following three signal test points are recommended for you to decide the main board failure Since the signal from these points is AC signal you should measure them using a digital oscilloscope SDG1000 Service Manual 49 S SIGLENT Table 5 4 Signal test points for the main board Test point Voltage Frequency Error limit TA15 1 5V Sine wave TA16 1 5V Sine wave T4 clock signal 25MHz 50ppm TA15 is tested for CH1 output waveform In the case of abnormal display of channel 1 on the oscilloscope screen if the tested voltage is within the spec range then the failure results from analog channel Otherwise the failure may result from FPGA TA16 is tested for CH2 output waveform In the case of abnormal display of channel 2 on the oscilloscope screen if the tested voltage is within the spec range then the failure results from analog channel Otherwise the failure may result from FPGA T4 is the mainboard clock signal Please test its frequency using an oscilloscope If the tested frequency is not 25MHz the mainboard clock proves to be faulted 50 SDG1000 Service Manual S SIGLENT Quick Guide for General Failures The general hardware failures are described as below Reading the following information can help you quickly handle some easy hardware failures with more convenience 1 No start up after pressing the Power button 1 Check if the power cord is correctly connected
31. op phrase Internal cycle Gated trigger Trigger source Rear Panel Connector External modulation External trigger S SIGLENT Sine Square Ramp Arbitrary except DC linear logarithmic Up down 1ms 500s Manual external internal Sine Square Ramp Pulse Arbitrary except DC Count 1 50 000 cycles infinite Gated 0 360 1 us 500 s External trigger Manuel External or Internal 6 Vpk 100 modulation 5KQ input impedance TTL compatible The external input voltage can t be over 6V otherwise instrument gets damaged Trigger Input Voltage level input Slope Pulse width Input impedance Trigger Output Voltage level Pulse width Output impedance Max frequency SYNC Output Voltage level Pulse width Output impedance Max frequency SDG1000 Service Manual TTL compatible Up or down optional gt 100 ns gt 5 kQ DC coupling TTL compatible gt 400 ns typical value 500 typical value 1 MHz TTL compatible gt 50 ns typical value 500 typical value 2MHz S SIGLENT Frequency Counter Measurement Frequency Period Positive negative pulse width duty cycle Frequency range Single Channel 100 mHz 200 MHz Frequency resolution 6 bit Voltage range and sensitivity non modulated signal DC offset range 1 5 VDC DC coupling Manual 100 mHz 100 MHz 50mVrms 2 5 V 100 MHz 200 MHz 100mVrms 2 5 V l 1 Hz 100 MHz 50m Vrms 5 Vpp AC coupling
32. pical value 1 kHz 1Vpp 0 1 of period typical value 1 kHz 1Vpp SDG1000 Service Manual Pulse Wave Pulse width Rise Fall time 10 90 typical value 1 kHz 1Vpp Duty Cycle Overshoot Jitter Ramp Wave Linearity symmetry Arbitrary Waveform Waveform length Vertical resolution Sample rate Min Rise Fall time Jitter RMS Storage in non volatile RAM memory 10 in total gt Output Specification Output Amplitude Vertical resolution 100 kHz sine waveform Amplitude flatness compared to 100 kHz sine waveform 5 Vpp Channel phase deviation Cross talk SDG1000 Service Manual S SIGLENT Max 1998 s Min 16 ns resolution 1 ns ns 0 1 99 9 0 1 Resolution lt 5 8 ns lt 0 1 of Peak value output typical value 1 kHz 1Vpp symmetric 100 gt 0 100 16 k points 14 bits include symbol 125 MSa s 7 ns typical value 8 ns typical 10 waveforms CH 1 CH 2 2mVpp 10Vpp 502 lt 10MHz 2mVpp 5Vpp 502 gt 10MHZ 4mVpp 20Vpp 2mVpp 3Vpp 502 L high resistance 10MHZ 4mVpp 6Vpp high resistance 4mVpp 10Vpp L high resistance gt 10MHz 0 3dB 1mVpp of setting value 0 3dB 1mVpp of setting value 0 3dB lt 400 ps classic value sine 50MHz 4Vpp lt 70 dBc S SIGLENT DC 5V 500 41 5V 502 Range DC 10 V high resistance 3 V high resistance Offset accuracy setting offset value 1 3 mV se
33. play SDG1000 Service Manual VII 5 SIGLENT The Front Panel Display at a Glance CHZ ine CHi Sine Output Status ame CHi Waveform Parameter Fa Name a Parameter Unit Value Channel Display Space 2 CHZ Sine CH1 Mod Information Trigger Information Softkey VIII SDG1000 Service Manual 5 SIGLENT The Rear Panel at a Glance 1 External 10 MHz Reference Input Terminal Sync Output Terminal Chassis Ground Power Socket USB Device Ext Trig Gate FSK Burst Terminal Nn O oo Bb Q N External Modulation Input Terminal WARNING For protection from electric shock the power cord ground must not be defeated If only a two contact electrical outlet is available connect the instrument s chassis ground screw see above to a good earth ground SDG1000 Service Manual IX S SIGLENT Contents Guaranty and Declaration eee eee eee General Safety SUMMA necia II Sately Terms and SYMDOIS ssoicraniataritaalas iaa dois II Overview for the Document sese ee eee ee IV SDG1000 Series at a G anCe coocccccncocccoccconocononocononononoconocanonanonanonnonanenanenens VI THE Front Panel ata GIANG Geenens riein rneer eniT NTETE TRTA VII The Rear Panel at a GIAN moscas ranas IX o Pe A A 1 PECCI ON AP e E a o AA 1 General Special Spee a 7 QUICK SLANG T 8 Prepare the Generator for USE ooccocccooncoccconconconoocnconoocncononononncononananoos 9 Adjust the Carrying handle ss
34. ply by measuring the pointed test points on them to help you decide the reason for the failure you encounter while operating SDG 1000 series arbitrary waveform generator ESD Precautions While performing any internal testing of the generator please refer to the following precautions to avoid damages to internal modules or components result from ESD e Touch circuit boards by the edges as possible as you can e Reduce handling of static sensitive modules when necessary eo Wear a grounded antistatic wrist strap to insulate the static voltage from your body while touching these modules o Operate static sensitive modules only at static free areas Avoid handling modules in areas that allow anything capable of generating or holding a static charge Required Equipments The equipments listed in the table are required to troubleshoot the generator Table 5 1 Required equipments 7 l Digital Multimeter Accuracy 0 05 o Agilent 34401A 1 mV resolution Oscilloscope 100MHz Bandwidth MSO7012B SDG1000 Service Manual A5 5 SIGLENT Main Board Drawing Please refer to the following drawing to quickly locate the test points on the main board for easy resolution of the failures you encounter A6 SDG1000 Service Manual G SIGLENT siglent technologies
35. r blow in normal power supply operation except that a significant overload occurs Replace the entire main power supply assembly if the input fuse fails 48 SDG1000 Service Manual S SIGLENT Check the Main Board If you want to remove the main board from the metal shelf inside the generator you d better place it on a clean insulated mat In addition to avoid some chips or components on the main board being damaged for overheating it is essential to cool the main board whenever possible using a fan Here are procedures for testing the main board 1 Several kinds of connectors including Fan Connector Power Connector and Keypad Connector are located on the main board Check if all these connectors are connected properly 2 Make sure that the connectors on the main board are properly connected then connect the generator to AC power and turn it on Check if the voltage values at all test points are within the spec range using a digital multimeter The voltage parameters to be tested are listed in table below Table 5 3 Voltage parameters of the main board TTestpoint Vottage vatwe Emortimit If each tested voltage value is within the corresponding spec range referring to the table above then the main board works normally Otherwise the failure may also come from power supply board except the main board please return the generator to the factory to have it repaired or contact SIGLENT In addition to power supply test p
36. rator for Use e To Adjust the Carrying Handle e To Set the Output Frequency e To Set the Output Amplitude e To Set a DC Offset Voltage e To Set the Duty Cycle of a Square Wave e To Set the Symmetry of a Ramp Wave e To Configure a Pulse Waveform e To Configure a Noise Waveform e To Select DC Volts e To Output a Built In Arbitrary Waveform e To Use the Built In Help System 8 SDG1000 Service Manual S SIGLENT Prepare the Generator for Use 1 Check the list of accessories Accessories supplied with the instrument are listed below If anything is missing or damaged please contact your nearest SIGLENT Sales Office e A Quick Start e A Certification e A Guaranty Card e A CD EasyWave software DataSheet and Manual e A power cord that fits the standard of destination country e A USB cable 2 Connect the power cord and turn on the generator The instrument runs a short power on self test which takes a few seconds The generator powers up in the sine wave function at 1 kHz with an amplitude of 4Vpeak to peak Channel 1 At power on the Output connector is disabled To enable the Output connector press the Output key If the generator does not turn on verify that the power cord is firmly connected to the power socket on the rear panel the power line voltage is automatically sensed at power on You should also make sure that the generator is connected to a power source that is energized Then verify that the g
37. roduct or CRT proves defective within the respective period SIGLENT will provide repair or replacement as described in the complete warranty statement To arrange for service or obtain a copy of the complete warranty statement please contact your nearest SIGLENT sales and service office Except that as provided in this summary or the applicable warranty Statement SIGLENT makes no warranty of any kind express or implied including without limitation the implied warranties of merchantability and fitness for a particular purpose In no case shall SIGLENT be liable for indirect special or consequential damages 52 SDG1000 Service Manual S SIGLENT Repackaging for Shipment If the unit needs to be shipped to SIGLENT for service or repair be sure to 1 Attach a tag to the unit identifying the owner and indicating the required service or repair 2 Place the unit in its original container with appropriate packaging material for shipping 3 Secure the container with strong tape or metal bands If the original shipping container is not available place your unit in a container which will ensure at least 4 inches of compressible packaging material around all sides for the instrument Use static free packaging materials to avoid additional damage to your unit SDG1000 Service Manual 53 S SIGLENT Contact SIGLENT SIGLENT TECHNOLOGIES CO LTD Address 3 F building NO 4 Antongda Industrial Zone 3rd Liuxian Road Bao an Distric
38. s eee 10 Set the Output Frequency ccooccocccoccoccconcoccccnconcnnoncncononnonanonnncnnonnnoninoncnnos 11 Set the Output Amplitude scr anaemia nnennannaonn 12 Set the DO ONIS Olano 13 Set the Duty Cycle of a Square Wave eee 14 Set the Symmetry of a Ramp Wave ee ee ee ee ee ee e 15 Generate a Pulse WaveforIM oocconccconcconoccncocnconocononnnnnconanonononanocanenanons 16 Configure a Noise WWaveforM ooccoccccccoconcccncocncononcncocnnncnnnnonononononanenanons 17 SEL me DO VOMNADO a iccecessanssonssecdeadiadcdsatcasiecelcenicculeonteatieauGeansede ploteo 18 Output a Built In Arbitrary Waveform see ee ee e e ee ee e eee e 19 Use the Built In Help System eee eee ee eee 20 Cala Nasca oe 21 loci e reo iO EEE iE EEEO 21 Adjustment is Recommended sse 21 Automating Calibration Procedures sss sese eee 21 Recommended Test EquipMenNt oocoococccccccccccnccnccnccnoccncnonnnnncnnnnnnnnnos 22 Test CONSIGSlAU ONS secretario 22 Performance Verification Test ee eee ee e 23 SO MAIS arca 23 Performance Verification Testa eee e ee 24 DC OGPU VI io o ee eyeOeOA 25 Duty Cycle Verification for Square see eee eee 26 Frequency Response Verification ooccoccconcocnconconconoconcnnnonnnnnos 21 AC Amplitude Verification occoocooncconcociccnocnconoonncanoncncononnnnanonons 28 General Adjustment Procedure cooccconcccncccnoconiconcococanocanocanonnnoncnonanonones 29 A 29 Feedback Channel
39. t Shenzhen P R China Tel 0086 755 3661 5186 E mail sales siglent com http www siglent com 54 SDG1000 Service Manual
40. tance test when you first receive the instrument or after performing adjustments Self Adjust A brief power on Self Test occurs automatically whenever you turn on the instrument This limited test assures that the instrument is operational To perform a complete self Adjust 1 Press Utility button on the front panel and enter to page 2 2 Select the Test Cal softkey then select the Self Adjust softkey The instrument will automatically perform the complete Self Adjust procedure when you release the key The Self Adjust will complete in approximately 20 seconds There is a progress bar show on the screen during the Self Adjust o lf the Self Adjust is successful 100 is displayed over the progress bar Ifthe Self Adjust fails the progress halts at some values lf repair is required see chapter 6 Service for further details SDG1000 Service Manual 23 S SIGLENT Performance Verification Tests The performance verification tests are recommended as acceptance tests when you first receive the instrument The acceptance test results should be compared against the specifications given in chapter 1 After acceptance you should repeat the performance verification tests at every calibration interval If the instrument fails performance verification adjustment or repair is required Adjustment is recommended at every calibration interval If adjustment is not made you must guard band using no more than 80
41. ter Frequency range 100mHz 200MHz Standard interface USB Host amp Device Dimension W x H x D 229mm x 105mm x 281mm SDG1000 Service Manual 1 Frequency Specification S SIGLENT SDG1005 SDG1010 SDG1020 SDG1025 SDG1050 Waveform Sine Square Ramp Pulse Noise Arb Sine 1uHz SMHz 14 Hz 10MHz 1u4Hz 20MHz 14 Hz 25MHz 1puHz 5OMHz Square 1uHz 5MHz 14 Hz 10MHz 1u4Hz 20MHz 14 Hz 25MHZ 1puHz 25MHz Pulse 5004 Hz 5MHz 5004Hz 10MHz Ramp 1uHz 300kHz Gaussian white e _ 5MHz 3dB 10MHz 3dB 20MHz 3dB 25MHz 3dB 50MHz 3dB Arbitrary waveform 1uHz 5MHz 1U Hz SMHz 1uHz SMHz 1uHz SMHz 1uHz SMHz resolution 1 uHz Accuracy Within 90daysv 50 ppm within 1 year 100 ppm 18 C 28 C Temperature Si lt 5 ppm C coefficient Sine Wave Spectrum Purity Harmonic Distortion DC 1MHz 1MHz 5MHz 5MHz 25MHz 25MHz 50MHz Total harmonic waveform distortion Spurious signal non harmonic Phase noise Square Wave Rise fall time Overshoot 1uHz 10 MHz 10 MHz exclude 20 MHz 20 MHz exclude 25 MHz Asymmetric 50 Duty Cycle Jitter Duty Cycle CH1 CH2 60 dBc 53 dBc 35 dBc 32 dBc DC 20 kHz 1 Vpp lt 0 2 DC 1 MHz lt 70 dBc 1 MHz 10 MHz lt 70 dBc 6 dB spectrum phase 10kHz Offset 108 dBc Hz typical value lt 12ns 10 90 typical value 1 kHz 1 Vpp lt 5 typical value 1kHz 1Vpp 20 80 40 60 50 1 of period 20 ns ty
42. the main body To install the metal shell and rear cabinet please operate as the reverse steps L y H d Table 4 5 Disassembled into three parts SDG1000 Service Manual 39 G SIGLENT siglent technologies Removing the Front Cabinet P 5 O o o Ss Sa Table 4 6 Removing the front cabinet Removing steps 1 Remove the front module cable connected to the main board 2 Remove the screws from the front cabinet using a PH2 philips screw driver 3 Separate the front cabinet from the main body of the generator To install the front cabinet please operate as the reverse steps Table 4 7 Disassembled into three parts 40 SDG1000 Service Manual S SIGLENT Removing the Display Module Table 4 8 Removing the display module screws Removing steps 1 Remove the scre
43. ti static solder suckers List of Modules The following removable modules are listed in the order of performing disassembly procedures The main Metal Shell and Rear Cabinet Front Shell Display Module Rear Metal Cover Required Tools Use these tools to remove or replace the modules in the oscilloscope PH2 philips head screw drivers Disassembly Procedures This section describes how to remove and install the modules listed above in the generator in detail Complete disassembly will be best achieved through the following operating steps SDG1000 Service Manual 35 G SIGLENT siglent technologies A view of the whole Instrument The disassembly drawing are shown as below for you to disassemble the generator in right steps Before disassembling please cut the power to avoid any personal injuries or damages to inside components Since some modules of the instrument are sharp you should also take care while operating to prevent being scratched Table 4 1 A view of the whole instrument 36 SDG1000 Service Manual S SIGLENT Removing the Handle YU L UU D UU 0 Dr a
44. tting offset value 1 3 mV Waveform Output Impedance 50 Q typical value Protection short circuit protection AM Modulation CH1 CH2 Carrier Sine Square Ramp Arbitrary except DC Source Internal External Modulation waveform Sine Square Ramp Noise Arbitrary 2 mHz 20 kHz Modulation depth 0 120 FM Modulation CH1 CH2 Carrier Sine Square Triangle Arbitrary except DC Source Internal External Modulation waveform Sine Square Ramp Noise Arbitrary 2 mHz 20 kHz Frequency deviation 0 0 5 bandwidth 1mHz resolution PM Modulation CH1 CH2 Carrier Sine Square Triangle Arbitrary except DC Source Internal External Modulation waveform Sine Square Ramp Noise Arbitrary 2 mHz 20 kHz Deviation U 360 0 1 resolution FSK Modulation CH1 CH2 Carrier Sine Square Ramp Arbitrary Cexcept DC Source Internal External Modulation waveform 50 duty cycle square waveform 2 mHz 50 kHz ASK Modulation CH1 CH2 Carrier Sine Square Ramp Arbitrary except DC Source Internal External Modulation waveform 50 duty cycle square waveform 2 mHz 50 kHz PWM Modulation CH1 CH2 Frequency 5004 Hz 20KHz Source Internal External Modulation waveform Sine Square Ramp Arbitrary except DC External Modulation range 6V 6V maximum width deviation 4 SDG1000 Service Manual Sweep CH1 CH2 Carrier Type Direction Sweep time Trigger source Burst CH1 CH2 Waveform Type Start St
45. ws from the keypad circuit board using a PH2 philips screw driver 2 Remove the keypad circuit board soft keypad and LCD screen from the front cabinet in sequence 3 Remove the front cabinet universal knob by firmly pull it out To install the display module please operate as the reverse steps SDG1000 Service Manual 41 SIGLENT siglent technologies A paa a Table 4 9 Removing the front cabinet module SDG1000 Service Manual 42 S SIGLENT Removing the Main Body Table 4 10 Removing the main body Removing steps 1 Remove the screws from the rear metal cover using the screw driver 2 Remove the rear metal cover from the main body of the generator 3 Remove the screws from the main board and power supply board and using the screw driver 4 Separate the rear metal cover main board and power supply in sequence board from the main body of the generator To install the main body please operate as the reverse steps SDG1000 Service Manual 43 siglent technologies F Table 4 11 Assembly drawing of the main body SDG1000 Service Manual 44 5 SIGLENT Troubleshooting The internal structure of the generator consists of main board power supply board and keypad circuit board and they are linked through cables or connectors This chapter explains the main checking procedures for main board and power sup
46. y assurance for Self Adjust e Channel Self Adjustment which includes internal control channel adjustment and signal channel adjustment e Square Adjustment which adjust the square duty to limit its error to the minimum o Frequency Response Adjustment which could properly compensate the amplitude as the frequency increases Warming up Before performing the adjustment procedures you must let the oscilloscope and other test equipments warm up for at least 15 minutes in an ambient temperature between 20 C and 30 C Adjustments performed prior to warm up or outside this temperature range may result in poor performance SDG1000 Service Manual 29 S SIGLENT Feedback Channel Adjustment The internal feedback channel receives the feedback signal from all the other channels that are performing self adjustment This adjustment acts as a standard test module and must be performed prior to Self Adjust to make sure it is performed based on a best adjusting accuracy 1 Turn on the generator 2 Connect the DMM PC and SDG1000 generator as shown below USB cable Alligator End Connector 3 Open the EasyTest software on the desktop and run the feedback channel script prepared previously The CH2 will be automatically turned on upon running of the script 30 SDG1000 Service Manual S SIGLENT Channel Self Adjustment This adjustment is for internal control channel and signal channel Through feedback circuits of the fe
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