Data Sheet
Contents
1. Ppin3 Pin7 lt gt Pin7 Figure 3 DB25 to DB25 Wiring Configuration p 44 SFG 830 This wiring configuration is used for computers with DB 9 D connectors configured as Data Terminal Eguipment EQUIPMENT COMPUTER DB25 DTE DB9 DTE Pin2 Pin2 i ue us Pin lt gt Pins Equipment Computer DB9 DTE DB9 DTE Pin2 Pin3 Pins 4 Figure 4 DB25 to DB9 DB9 to DB9 Wiring Configuration SFG 830 p 452. eeeeeeeeeeeeeeeeeeeeeeenernnnnnnnn 16 6 12 Setup of FM Modulation eeeeeeeeeeeeeeeeeeeenennnn 17 6 13 Setup of PM Modulation cessere 18 6 14 The Commands of GPIB Serial Interface 18 6 15 Syntax and Commands iine naboja cede 24 ed ava daja as Gui c cw C Die Ria ads 22 6 16 The Examples of the Communication Interface Software 24 7 Adjustment and Correction eeeeeeeeeeeeeeeeeeeee eene eene nnn nnns 27 7 1 Preparation p 27 7 2 Adjusting CIOCK iaces nine oe cU Dn E Rd RE XEM HAVE Aa 27 7 3 Adjusting the DC of Frequency Double eess 27 nad Adjustiricj D A NEL sina ena a ak ie elan 27 7 5 Adjusting the Bandwidth iioii eiit rini andi nda aaa aaa aaa 27 7 6 Adjusting the Filter irr nero nnne cine cei 28 7 7 Adjusting Harmonic Distortion eeeeeeeeeeereneeneeneeeennnne 28 7 8 Calibrating Dy Software iiiisccscdteriasieiaveccscdiue Qu vala deia edP FE dena 28 7 9 Checking Frequency Accuracy ssssseeeeeeeeeeeeeeeeeeeneeeeeeeeeeeeeeeeeeeneneeeeeees 32 7 10 Checking the Amplitude sname ns nasa ri vOv In RU I a ERE V P va coal ER ERG aaa 32 8 The Block Diagram and Description of the System 35 Appendix 1 Command
3. sprintf cmd SOUR FUNC LDWF din number ibwrt dev cmd strlen cmd ibwrt dev cmd 40 if cmd 1 lt 0x31 ibtmo dev T30s ibwrt dev char data 1ong 2 number send waveforms data sprintf cmd SOUR FUNC ARB n ibwrt dev cmd strlen cmd SFG 830 EXAMPLE 2 Arbitrary Amplitude Modulation include lt stdlib h gt include lt userint h gt include lt utility h gt include lt gpib h gt iinclude lt ansi_c h gt include lt string h gt int sfg830 int data 10000 void main char cmd 40 int i j number double amp cycle phase double wave 10000 if sfg830 ibfind dev8 lt 0 printf cannot find SFG830 n exit 1 number 1000 amp 2 phase 0 cycle 1 SinePattern number amp 2 phase cycle wave for j lt 0 j lt number j wavel j 2048 1368 wavelj datalji lt int wave j 0 5 sprintf cmd SOUR FUNC SOUR 5 n ibwrt dev cmd strlen cmd sprintf cmd SOUR FUNC AMOD din number ibwrt dev cmd strlen cmd ibrd dev cmd 40 ibtmo dev T30s ibwrt dev char data 10ng 2 number send waveforms data sprintf cmd SOUR MOD STAT 1 n ibwrt dev cmd strlen cmd EXAMPLE 3 Arbitrary Frequency Modulation include lt stdlib h gt include lt userint h gt include lt utility h gt include lt gpib h gt iinclude lt ansi_c
4. EN50081 2 Electromagnetic compatibility 1993 Generic emission standard Low Voltage Equipment Directive 73 23 EEC Part 2 Industrial Environment Conducted Emission EN 55011 class A Low Voltage Directive EN Radiated Emission 1991 9 61010 1 1993 A2 1995 SFG 830 p i 1 Precautions SFG 830 is especially designed for safe operation It has passed rigorous tests of inclement environment to ensure its reliability and good condition The following precautions are recommended to insure your safety and the best condition of this eguipment 1 Safety Terms and Symbols The following terms and symbols may appear in this manual A WARNING This statement identifies conditions or practices that could result in injury or loss of life N CAUTION This statement identifies conditions or practices that could result in damage to this product or other properties The following terms and symbols may appear on the product DANGER This term indicates an immediately accessible injury hazard WARNING This term indicates that an injury hazard may occur but is not immediately accessible CAUTION This term indicates potential damage to this product or other properties DANGER Fetectve ATTENTION Double DANGER oo Conductor Ground High voltage refer to manual Insulated Hot surface Terminal Terminal 2 Do not place any heavy objects on the instrument under any circumstances 3 Disassembling the instrument Due to the precision of
5. O Keep the same Function and Amplitude and set Frequency to be 1kHz 10kHz and 100kHz in turn Perform step 0 0 in each frequency setting until the Frequency 100kHz 4 Check the Accuracy of DC Offset The deviation should be 1 5 1mV Set conditions Function Sine Wave Amplitude 0 0Vp p Frequency 1kHz DC Offset 5V 5V OV in turn 0 Use a DMM at DCV range with 50 ohm load to measure the output Check and make sure the corresponding output to each DC Offset is in the range listed below DCOffset Output 5V 4 925V lt output lt 5 075V 5 075V lt output lt 4 925V OV lt o o ovo 1mV s output s 1mV 5 Checking the Sub Harmonic The deviation should be lt 50dBC Set conditions Function Sine Wave Amplitude 10Vp p DC Offset OV Use a spectrum analyzer to measure the output Check and make sure that the corresponding output to each Frequency setting is in the range listed below Fr auen Center Frequency of 3 d Spectrum Analyzer 102kHz 51kHz 1 001MHz 501kHz 20 001mHz 10 001MHz 30 0mHz 15 0mHz SFG 830 p 33 6 Checking the Harmonic Distortion The deviation should be lt 100kHz 10 30MHz Set conditions Function Sine Wave Amplitude 1Vp p Freguency 100Hz O Use a distortion meter DM 155A B with 50 ohm load to measure the output Check and make sure that the output should be lt 50dBC 0 31 O Set the Frequency to be 1kHz 10kHz
6. Set the Calibration Number 0 Use a DMM FLUKE 8842 at DCV range to measure the output 6 Key in an appropriate Calibration Value to make the output to be the particular value listed below O Calibration Number Output should be Use a DMM FLUKE 8842 at DCV range to measure the output SFG 830 p 29 2 Negative Attenuator Calibration To calibrate the negative attenuator you should go through Calibration Number 9 16 in turn and perform the following 3 steps for each number Set the Calibration Number 0 Use a DMM FLUKE 8842 at DCV range to measure the output Key in an appropriate Calibration Value to make the output to be the particular value listed below O Calibration Number Output should be DCV range to measure the output 14 6 Use a DMM FLUKE 8842 at 1 1 l z 3 i 0 1 2 3 4 5 6 3 Carrier Null Calibration Set the Calibration Number to 17 O Use a distortion meter DM 155 A B to measure the output Key in an appropriate calibration value to minimize the distortion Then go through step Q e repeatedly to calibrate the output of Number 18 113 O Set the Calibration Number 18 113 one number each time Use a spectrum analyzer to measure the output Q Set the Center Frequency of the spectrum analyzer to be X where X lt Calibration Number 11 x 312500 1000 Key in an appropriate Calibration Value to minimize the power of frequency Y X
7. 50kHz and 100kHz in turn Perform step and 0 until the Frequency 100kHz Q Use a spectrum analyzer to measure the output Check and make sure that the corresponding output to each Frequency setting is in the range listed below Frequency Output 500kHz lt 40dBC lt 30dBC 15MHz lt 25dBC 30MHz lt 25dBC 7 Checking the Phase Noise The deviation should be lt 50dBC Set conditions Function Sine Wave Amplitude 13dBm Freguency 10MHz Use a spectrum analyzer to measure the output Check and make sure that the difference between the powers of 10MHz and 10MHz 15kHz is less than 50dBC 8 Checking the Rise Time of Sguire Wave p 34 The deviation should be Rise Time lt 15ns and Overshoot lt 5 at full scale output Set conditions Function Square Wave Amplitude 10Vp p Frequency 1MHz O Use an oscilloscope with 50 ohm load to measure the output Check and make sure that the Rise Time lt 15ns and the Overshoot Undershoot 500mVp p SFG 830 9 Checking the Symmetry of Sguare Wave The deviation should be lt 1 of period 4ns Set conditions Function Square Wave Amplitude 10Vp p Frequency 1MHz O Use an oscilloscope with 50 ohm load to measure the output Check and make sure that the output is 49 51 or 51 49 10 Checking the AM Envelop Distortion The deviation should be lt 35dB at 1kHz Use a spectrum analyzer with Center Frequency at 1
8. where Y 2 2 4 Calibrating the Amplitude of Sine Wave Set the Calibration Number 114 115 one number each time 0 Use a DMM FLUKE 8842 at ACV range with 50 ohm load to measure the output Input an appropriate Calibration Value until the output to be the corresponding figures as listed in the table below Then go through step repeatedly to calibrate the output of Number 116 307 O Set the Calibration Number 116 307 one number each time se a measuring receiver HP 8902A or equivalent for high frequency amplitude checks at ACV range to measure the output O Input an appropriate Calibration Value to make the output to be as follows Calibration Number 114 307 Output Voltage odd 177 0009Vms 3 54 0 01 Vrms p 30 SFG 830 5 Calibrating the Amplitude of Sguare Wave Go through step 0 repeatedly to calibrate the output of Number 308 404 Set the Calibration Number O Use an oscilloscope with 50 ohm load to measure the output Input an appropriate Calibration Value to make the output to be 10 1Vp p 6 Calibrating the Amplitude of Triangle Wave Set the Calibration Number to be 405 0 Use an oscilloscope at 500 to measure the output Input an appropriate Calibration Value to make the output to be 10 1Vp p 7 Calibrating the Symmetry of Square Wave Go through step 0 repeatedly to calibrate the output of Number 406 502 Set the Calibration Number O Use a fixture
9. 27 7 6 Adjusting the Filter Press Shift DEFAU keys O Set conditions Function ARB Amplitude 8Vp p Frequency 2MHz sampling frequency Use a oscilloscope at 2V DIV 200ns DIV with 50 ohm load to measure the output O Adjust SVC301 302 303 and 304 in turn to get the shortest rise time and the smallest peak to peak ripple Repeat steps 0 0 once 7 7 Adjusting Harmonic Distortion Set conditions Function Sine Wave Amplitude 8Vp p Frequency 15kHz Use a spectrum analyzer with 50 ohm load start frequency at OHz and stop frequency at 15kHz to measure the output Adjust SVR501 until get the smallest second harmonic 20kHz O Repeat step 9 and 0 Adjust SVR603 until third harmonic 45kHz and fifth harmonic 75kHz achieve the same level NOTE When use software in calibrating these steps should be gone through after Callier Null calibration Meanwhile adjust SVR501 and SVR603 to minimize distortion 7 8 Calibrating by Software A B Calling Default Calibration Data O Press Shift 9 8 3 0 keys The display will indicate default for a few seconds then shows 1000 00Hz The calling of default calibration data is then finished Manual Calibration Basic Steps Press Shift 0 8 3 0 keys to shift to the manual calibration mode p 28 The display will indicate CAL EDIT for a few seconds then shows 00001 blinking and 1000 The figure
10. by the use of defined program messages instrument responses and data formats across all SCPI instruments regardless of manufacturer Syntax SYSTem ERRor The above command is used to check if the instrument is working correctly after the GPIB command has been sent out SFG 830 provides error messages including command error execution error device specific error and query error A error message contains an integer denoting an error number and associated descriptive text e g 0 No error 100 Command error etc The four categories of error messages are listed below Command Error An error number in the range 199 100 indicates that an IEEE488 2 syntax error has been detected by the instrument s parser The occurrence of any error in this class shall cause the command error bit bit5 in the event status register to be set EmorNumber Error Description Invalid character in number SFG 830 Execution Error An error number in the range 299 200 indicates that an IEEE488 2 syntax error has been detected by the instrument s execution control block The occurrence of any error in this class shall cause the execution error bit bit 5 in the event status register to be set Error Number Error Description Invalid while in local Data out of range Out of memory Device Specific Error An error number in the range 399 300 indicates that he instrument has detected an error which is not a
11. with 500 to measure the output O Input an appropriate Calibration Value to make the output to be as follows Calibration Number 406 437 50 1 dns 438 460 461 486 487 502 8 Finishing Manual Calibration Press STOR key Default will be shown on the display after 3 seconds C Automatic Calibration Press Shift 1 8 3 0 keys to shift to automatic calibration mode In a few minutes Auto Cal will be shown on the display indicates the accomplishment of automatic calibration The table below lists the corresponding items to the Calibration Numbers Calibration Item Calibration Number All of the calibrating procedure is accomplished after the automatic calibration SFG 830 p 31 7 9 Checking Freguency Accuracy The deviation should be within 5ppm Set conditions Function Sine Wave Amplitude 1Vp p Freguency 10MHz O Use a counter with 50 ohm load to measure the output Check and make sure the output is 10MHz 40Hz 7 10 Checking the Amplitude 1 Check the Amplitude of Sine Wave The deviation should be 0 5dB 45 994 Set conditions Function Sine Wave Amplitude 3 54Vrms 10Vp p Freguency 100Hz 0 Use a DMM FLUKE 8842 at ACV range with 50 ohm load to measure the output Check and make sure that 3 33Vrms lt output lt 3 74Vrms O Keep the same Function and Amplitude and set Frequency to be 1kHz 10kHz 100kHz 1MHz and 2 30MHz step 2MHz
12. ARB The display will show arb edit then shifts to compiling mode 0 Press SHIFT and ARB again The display will show clr arb fnc then shifts to the mode of deleting arbitrary wave Press any unit button The display will show arb cleared for a few seconds then shows cir arb fne which indicates that all the data of the arbitrary wave have been deleted O Press SHIFT and ARB to compile again 6 7 The Setting of STOR Button The STOR button is used to save the setup parameters of the instrument into its memory numbers can be selected from 0 to 9 i e up to 10 groups Push STOR button 0 Key in a number from 0 to 9 to indicate the number Press any button from DEG 96 mHz dBm kHz Vrms or Hz Vpp to complete Example To save a parameter to the RAM of group 5 press STOR first Then key in 5 and press Hz SFG 830 p 13 6 8 The Setting of RECL Button The RECL button can retrieve the parameters saved in the RAM Push RECL button 0 Key in the number of the group that you want to retrieve the parameters from Select a button from DEG mHz dBm kHz Vrms or Hz Vpp to complete Example To recall a parameter from the memory of group 5 press RECL first Then key in 5 and press Hz 6 9 The SHIFT Key and Function Keys SHIFT button is used to enable the secondary function of certain function keys that wit
13. ASCII character 1 into the instrument s output queue when all pending instrument operations are finished Clear Status Command e This command clears status data structures On the other hand it sets the bits of the Standard Event Register and the Status Byte Register to zero The Output Queue and the MAV bit will not be cleared Standard Event Status Enable Command ESE followed by a decimal value sets the bits of the Standard Event Status Enable Register which correspond to that decimal value to 1 This enables the assigned bits of the Standard Event Status Register Standard Event Status Enable Query This query asks for the contents of the Standard Event Status Event Register The response is a decimal value e g 255 means all events of the Standard Event Status Register are enabled in other word all bits are 1 Standard Event Status Register Query Ask for the contents of the Standard Event Status Register The response is a decimal value The guery clears the register contents p 40 SFG 830 SRE Service Request Enable Command ESE followed by a decimal value sets the bits of the Service Request Enable Register which correspond to that decimal value to 1 except bit 6 For all bits except bit 6 a bit value of one shall indicate an enabled condition The bit value of one indicates a disabled condition The bit value of bit 6 shall be ignored Service Request Enabl
14. ET first then key in 1 2 and press Vpp The limitations of input 1 Amplitude should be among 0 01 10Vpp 2 Offset should be among H5Vpp 3 AMPL 2 x OFFSET x 10Vpp 6 5 The Setup of Arbitrary Wave Compiler p 12 This section explains the compiling procedure of arbitrary waveform by using buttons on the front panel The detailed example of delivering data through optional GPIB will be stated in the chapter of communication interface Set the output function to be ARB as stated in section 6 1 Press FREQ and the display will show the reading frequency of ARB function range 42 9496MHz N where N 8 10 12 2 Press SHIFT ARB to start arbitrary wave compilation There will be two set of figures on the display the left one indicates the number of a certain point and the right one represents the value of that point O Use A or V buttons in the MODIFY column to check out the value of the previous or the next point To edit value of a point press SHIFT A key in numbers and select a proper unit button to specify new value of the point Note SHIFT and A buttons are used together for switching the blinking state between the number and the value of a point Following the order of arranged points to compile arbitrary wave is necessary Example of Compiling Arbitrary Wave The following example will guide you to proceed the compilation of arbitrary wave Her
15. ION column to select SINE waveform Press FREQ 1 0 KHz buttons to set the frequency of the wave Then use 4 or gt button in SWEEP MODULATION column to select SINE waveform O Press AM e Press RATE 1 0 0 Hz O Press SPAN 1 0 0 26 to set the modulation depth 0 Press MOD ON OFF to start performing modulation Note O Different sequence of the steps taken will not make any change on the execution and the result Q SFG 830 has both internal and external modulation functions p 16 SFG 830 The input voltage of external modulation is 5V 5V If the input voltage is between OV 5V the AM modulation will be the common modulation If the input voltage is between 5V 5V the AM modulation will be double sideband suppressed carrier DSBSC o SFG 830 can output waveform that is synchronized with its AM modulation signal In the above example the Sweep modulation output terminal on the rear panel will output the waveform of SINE 100Hz The compiling of arbitrary wave should be carried out via the communication interface Please refer to Example 2 in section 6 16 6 12 Setup of FM Modulation The FM modulation function offers sine square triangle ramp and arbitrary signals Select a waveform by lt 4 or gt button in FUNCTION column 0 Use 4 or gt button in SWEEP MODULATION column to select a modulation signal from sine square tri
16. MHz and Span Frequency at 20kHz to measure the output 0 Check and make sure that the differences between powers of Basic Wave and sidebands 2k 3k Offset are less than 35dB 8 The Block Diagram and Description of the System Graph 2 is the block diagram of SFG 830 system which consists of a micro processor unit MPU a direct digital synthesizer DDS a digital to analog converter DAC a RAM module a low pass filter LPF a frequency double F D a square waveform comparator a amplitude control an output amplitude an attenuator ATT etc The principles of generating waveforms are stayed as follows 1 Sine Waveform The data of waveform is stored in the lookout table of DDS Q 2334 The output frequency can be altered by solely changing the control word K please refer to Chapter 2 The digital output passes the DAC and be converted to a step shape analog signal This signal will then be filtered by a 9 level LPF2 and becomes a pure sine wave Due to the frequency response of DDS and the points of the output waveform the sine wave should pass the F D circuit U301 and AD834 the amplitude control the output amplitude ATT and output through the Main Out terminal 2 Square Waveform The procedure of generating square waveforms is similar to that of generating sine waveforms The only difference is that the signal will pass a square wave comparator circuit between the F D circuit and the amplitude control
17. O Different seguence of the steps taken will not make any change on the execution and the result Q The bandwidth SPAN stop frequency start frequency The center frequency SWP CF stop frequency start frequency 2 The start frequency STAR center frequency of the sweep bandwidth 2 The stop frequency STOP center frequency of the sweep bandwidth 2 The start and stop frequencies can be freely set according to the preference of different users SFG 830 can output waveform that is synchronized with its sweep function In the example of setting up LIN sweep the Sweep modulation output terminal on the rear panel will output the waveform of ramp 1Hz 6 11 Setup of AM Modulation The AM modulation function offers sine square triangle ramp and arbitrary signals O Select a waveform by 4 or gt button in FUNCTION column O Use 4 or gt button in SWEEP MODULATION column to select a modulation signal from sine square triangle ramp or ARB Press AM button O Press RATE to set up sweep RATE TIME range 0 001Hz 10kHz Press SPAN to set the Modulation Depth range 100 Press MOD ON OFF to start performing modulation Example of the Setup of AM Modulation To set the following conditions Modulation waveform sine Modulation rate 100Hz Frequency 10kHz Signal sine 100Hz AM modulation Procedure Use 4 or gt button in FUNCT
18. SFG 830 p 35 NdW uoneinpow WY 10198108 ova els 8X8 sng g ga CI Wwe epnyjduiy s E indui WY D L NJdVHS ES ES Dm Joyesedwoy 5n appz 7 9ARM asenbs o gpzL gpo dwy 101 u09 yndjno Liv andino pny dwy NIVIN A Pajas sna 10199JoS KE t a d33MS uone npow NA 8x8 dwey aj6ueu PISAL CI WYJ 1 WYJ SFG 830 p 36 3 Triangle Waveform When the user input a freguency the MPU will calculate the correspondent data then save it in RAM II U211 U213 and save the number of the data in the Up Down Counter U215 U218 74F193 As the Up Down counter is controlled by the B11 in DDS1 through 74F193 CLK Input the desired freguency value can be obtained by changing the counter s reading freguency i e the freguency of CLK The output freguency of triangle waveform is lower that that of sine waveform and sguare waveform due to the different paths The triangle wave passes a 7 level LPF1 and does not go through F D 4 Ramp The procedure of generating ramp is the same as that of generating triangle waveforms 5 AM Modulation This includes internal modulation and external modulation with the same operation procedure Take internal modulation for example the input data will be calculated by MPU and be written in RAM III 8kx8 the Up Down Counter will then read out the data in RAM and send it to the Amplitude Control U501 AD834 via DAC Different input voltages can change
19. Signal Function Synthesizer Mode SFG 830 82FG 83000MC Contents Ti Pre autiOnS ici ccceccssccseccseccseccssccssccsascsscssancdeccsascsecssancdedssassuecssasssedssasseedssasssedsuaseuaueu 1 PM pstueiince 4 NE 5 4 SPECIFICATIONS visine vije conn nao es ce vei vid ii rr eo a DER RU E FE F2 Y E EX FI X Rr ed Lu 6 5 Front and Rear Panels irrepsit ctn Ryo ax Feb x A cV Lay Xawdu Ra SkX Fe ae 8 e Cii m 11 6 1 The Setup of Output Function eeeeeeeeeeeeeeeeeeeeeeenennn 11 6 2 The Setup of Frequency nica nana intu n uaa cen nha nena akade kaka nenna 11 6 3 The Setup of Amplitude ui isa cias riri cio pad Tine sia v ccv lah 11 6 4 The Setup of Offset Liu certa rrr reni Cra bea Fe Fa ded i Da DF dd Cedar 12 6 5 The Setup of Arbitrary Wave Compiler eeeeeeesss 12 6 6 Deleting the Data of Arbitrary Wave ceeeeeeeeeeeeenenennn 13 6 7 The Setting of STOR Button carnrinin istis ccu cian arisen a rona raa nenna 13 6 8 The Setting of RECL Button eeeeeeeeeeeeeeeeeeeeeeeeennnn 14 6 9 The SHIFT Key and Function Keys eere 14 6 10 Setup of LIN or LOG Sweep ssssseeeeeeeeeeseeseeeeeeeeeeeeeseeeeseeneeeeeeeseeeenees 15 6 11 Setup of AM Modulation
20. Z in turn Perform step 0 0 use measuring receiver HP 8902 or equivalent needed for HF Amplitude check instead in each frequency setting until the Frequency 30MHz Q Set conditions Function Sine Wave Amplitude 1Vrms Frequency 100Hz Use a DMM FLUKE 8842 at ACV range with 50 ohm load to measure the output Check and make sure that 0 94Vrms lt output lt 1 04Vrms O Keep the same Function and Amplitude and set Frequency to be 1kHz 10kHz 100kHz 1MHz and 2 30MHz step 2MHZz in turn Perform step 0 0 use measuring receiver HP 8902 or equivalent needed for HF Amplitude check instead in each frequency setting until the Frequency 30MHz 2 Checking the Amplitude of Square Wave p 32 The deviation should be 12 Set conditions Function Square Wave Amplitude 10Vp p Frequency 100Hz Use an oscilloscope with 50 ohm load to measure the output Check and make sure that 8 8Vp p lt output lt 11 2Vp p O Keep the same Function and Amplitude and set Frequency to be 1kHz 10kHz 100kHz 1MHz and 2 30MHz step 2MHZz in turn Perform step 0 0 in each frequency setting until the Frequency 30MHz SFG 830 3 Checking the Amplitude of Triangle Wave The deviation should be 5 Set conditions Function Triangle Wave Amplitude 10Vp p Frequency 100Hz O Use an oscilloscope with 50 ohm load to measure the output Check and make sure that 9 5Vp p lt output lt 10 5Vp p
21. angle ramp or ARB Press FM button O Press RATE to set up sweep RATE TIME range 0 001Hz 10kHz Press SPAN to set the Frequency Span 0 001Hz 30MHz for sine and square 100kHz for triangle ramp and arb Press MOD ON OFF to start performing modulation Example of the Setup of FM modulation To set the following conditions Main waveform sine Span 10kHz Main frequency 100kHz Modulation signal sine 1kHz FM modulation Procedure Use lt or gt button in FUNCTION column to select SINE waveform O Press FREQ 1 0 0 kHz buttons to set the frequency of the wave Use 4 or gt button in SWEEP MODULATION column to select SINE waveform O Press FM Press RATE 1 kHz O Press SPAN 1 0 kHz to set span 0 Press MOD ON OFF to start performing modulation Note O Different sequence of the steps taken will not make any change on the execution and the result Q SFG 830 can output waveform that is synchronized with its FM modulation signal In the above example the Sweep modulation output terminal on the rear panel will output the waveform of SINE 1kHz The compiling of arbitrary wave should be carried out via the communication interface Please refer to Example 3 in section 6 16 SFG 830 p 17 6 13 Setup of PM Modulation SFG 830 use 256PSK Phase Shift Key in to generate PM modulation Use lt or gt butt
22. command error a query error or an execution error The occurrence of any error in this class shall cause the device specific error bit bit 3 in the event status register to be set Error Number Error Description 315 Configuration memory ost Query Error An error number in the range 499 400 indicates that the output queue control of the instrument has detected a problem with the message exchange protocol described in IEEE488 2 The occurrence of any error in this class shall cause the query error bit bit 2 in the event status register to be set Error Number Error Description Query INTERRUPTED Query UNTERMINATED Query DEADLOCKED SFG 830 p 23 6 16 The Examples of the Communication Interface Software EXAMPLE 1 Send Arbitrary Waveforms include lt stdlib h gt include lt userint h gt include lt utility h gt include lt gpib h gt iinclude lt ansi_c h gt include lt string h gt p 24 int int void sig830 data 10000 main char cmd 10 int i j number double amp cycle phase double wave 10000 if sfg830 ibfind dev8 lt 0 in cannot find SFG830 n exit 1 number 1000 amp 2 phase 0 cycle 1 SinePattern number amp 2 phase cycle wave for j lt 0 j lt munber j wave j 4094 wave jl amp data j short wave j 0 5 for j lt 0 jenumber j if data j O datalj Oxtfff datalj 1 0x8000
23. ction Sine Wave Amplitude 5Vp p Modulation OFF Frequency 10MHz Use Counter to measure the output Adjust X202 until the frequency reaches the range of 10MHz 20Hz 7 3 Adjusting the DC of Frequency Double Set Conditions Function Sine Wave Amplitude 10Vp p Frequency 10kHz 0 Use an oscilloscope at AC 100mV DIV 20us DIV to measure U303 Pin 1 Adjust SVR301 until a flat DC signal shows up 7 4 Adjusting D A Ref Set Conditions Function Sine Wave Amplitude 10Vp p Modulation OFF Frequency 1kHz O Use an oscilloscope with 50 ohm load to measure the output Adjust SVR201 until the output becomes symmetric sine waves 7 5 Adjusting the Bandwidth Set conditions Function Square Wave Amplitude 8Vp p Modulation OFF Frequency 10kHz Use DMM at DCV range to measure U601 Pin6 and adjust SVR601 until the readout to be 0 0V Set conditions Frequency 100Hz O Use an oscilloscope at 2V DIV 5ms DIV with 50 ohm load to measure the output Then adjust SVR604 until the output becomes flat square waves Set condition Freguency 500kHz Use an oscilloscope at 2V DIV 1us DIV with 50 ohm load to measure the output Then adjust SVR602 until the output becomes flat sguare waves Set condition Freguency 500kHz Use an oscilloscope at 2V DIV 200ns DIV with 50 ohm load to measure the output Then adjust SVC601 to get the shortest rise time and the overshoot be lt 5 SFG 830 p
24. ds of IEEE488 2 Function Parameter Clear status command Standard event status enable command Standard event status enable guery Standard event status register guery Identification guery Operation complete command Operation complete guery Recall command Reset command Save command Service reguest enable command Service reguest enable guery Read status byte guery Self test guery Wait to continue command Note The range of numerical data is 0 255 For more details please refer to appendix 1 2 Commands of the Instrument Nil Numerical data Nil Nil Nil Numerical data Nil Integer among 0 9 Nil Integer among 0 9 Numerical data Nil Nil Nil Nil SYSTem ERR Check the type of error messages N SOURce FUNCtion WAV Eform Check the present waveform SOURce FREQuency SYNThesis Set the frequency of synthetic waves SOURce FREQuency SYNThesis Check the frequency of synthetic waves SFG 830 p 19 Commands of the Instrument cont SOURce FREQuency CENTer Set center frequency of synthetic waves SOURce FREQuencv CENTer Check the center frequency of synthetic y waves SOURce FREQuency SPAN Set span frequency of synthetic waves Numeric data data SOURce EREOUencv SPAN Check the span freguency of synthetic y waves Mis SOURce AMPLitude UNIT Set the unit of output amplitude MOI p 20 SFG 830 Commands of the Instrument cont command run Pomer SOURc
25. e 8 points values are identified as 0 400 800 1200 0 0 0 0 in an order will be compiled The changes of waveform will be observed via an oscilloscope Procedure 9 Use 4 or gt buttons in FUNCTION column to select ARB waveform 0 Press SHIFT and ARB The display will show arb edit for a while then shows 0001 2047 which indicates that you are in the compiling mode and the value of the first point is 2047 The number 0001 will be blinking SFG 830 Press SHIFT and A to make the right hand figures 2047 blinking then key in 0 and press Hz to change the value of the first point from 2047 to 0 O Press SHIFT and A again to make the left hand figures 0001 blinking Press A to compile the second point The display will show 0002 2047 which indicates the value of the second point is 2047 The number 0002 is blinking Press SHIFT and A to make 2047 blinking then key in 4 0 0 and press Hz to change the value of the second point from 2047 to 400 Repeat step 0 to O to complete the compilation of other points Press FREQ and set the reading frequency according to the frequency setting procedure The limitations of input 1 Compiling points up to 12000 points 2 Compiling value 2047 2047 3 Reading frequency 42 949600MHZ N where N 8 10 12 2 6 6 Deleting the Data of Arbitrary Wave Press SHIFT and
26. e FUNCtion LDWE Set the point of arbitrary wave in don wave mode SOURce FUNCtion AMOD Set the point of arbitrary wave in frequency SOURce FUNCtion FM DE Viation Set the span of FM modulation Numeric data data SOURce FUNCtion FM DEViation Check the span of FM modulation NOTE All of the above commands correspond with the SCPI Standard You can key in the whole line or just the capital letters of each command The numeric data should be within the suitable range of each command For example The range of a synthetic wave is 0 01Hz 30MHz amp Parameters ON and 0 mean that the input mode is on OFF and 1 mean that the input mode is off The meaning of parameters 1 5 are 1 Sine wave 2 Sguare wave 3 Triangle wave 4 Ramp wave 5 Arbitrary wave SFG 830 p 21 6 15 Syntax and Commands p 22 This section provides an overview of the commands for the SFG 830 Synthesized Function Generator SCPI Standard Commands for Programmable Instruments is a standard created by an international consortium of the major manufacturers of test and measurement equipment SCPI uses IEEE488 2 syntax to provide common commands for the identical functions of various programmable instruments The goal of SCPI is to reduce Automatic Test Equipment ATE program development time SCPI provides a consistent programming environment for instrument control and data usage This consistent programming environment is achieved
27. e Query Asks for the contents of the Service Request Enable Register The response is a decimal value Read Status Byte Query Asks for the contents of the Status Byte Register The response is a decimal value This command followed by a decimal value stores the current instrument setting into the corresponding memory place The contents of the memory is not affected by the command RST or when POWER OFF the instrument Recall Command e This command followed by a decimal value for the memory place call up and executes the instruments settings stored in that memory place SFG 830 p 41 STATUS BYTE DEFINTIONS 0 Sweep Done set when no sweeps are in progress 2 moused G 0 O 8 notused Gk4 oo 5 6 ROS MSS SRQ Service Request bit ESR Standard Event Status Byte 0 OPCOL Operation complete lt 6f URSO jUserreuest o Z o p 42 SFG 830 APPENDIX 2 RS 232 Wiring Configuration SFG 830 is a DTE device with a 9 pin D type male or 25 pin D type female shell RS 232 connector located on the rear panel In standard usage a male connector appears on DTE devices and a female connector appears on DCE devices A straight through female to male cable of less than 50 feet is typically used for local DTE to DCE connection device consider the suggestions as follows Many devices require a constant high signal on one or mo
28. ead appliance must only be s k wired by competent persons coloured Green or Green and Yellow The wire which is coloured Blue must be connected to the terminal which WARNING is marked with the letter N or coloured Blue or Black THIS APPLIANCE MUST BE The wire which is coloured Brown must be connected to the terminal EARTHED marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact IMPORTANT the supplier The wires in this lead are This cable appliance should be protected by a suitably rated and coloured in accordance with the approved HBC mains fuse refer to the rating information on the following codes equipment and or user instructions for details As a guide cable of 0 75mm should be protected by a 3A or 5A fuse Larger conductors Green Yellow Earth Blue Neutral Brown Live Phase would normally require 13A types depending on the connection method used Any moulded mains connector that requires removal replacement must be destroyed by removal of any fuse and fuse carrier and disposed of immediately as a plug with bared wires is hazardous if engaged in a live socket Any re wiring must be carried out in accordance with the information detailed in this section SFG 830 p 3 2 Product Outline The freguency synthesis method applied by SFG 830 is Direct Digital Synthesis DDS a new technigue that generates stable output freguency with ext
29. eturn 0 if not available The fields are separated by commas Example GW Inc SFG 830 Serial number 1111 000 90 1 0 The command performs a device reset which sets the instrument to a defined status as bellow modulation OFF frequenc 1KHz amplitude 1V DC offset OV e The reset command shall not affect the following The state of the IEEE 488 1 interface The selected IEEE 488 1 address of the device The Output Queue The Service Request Enable Register The Standard Event Status Enable Register Calibration dat p 38 SFG 830 Selftest Query Cause an instrument to execute an internal self test and returns a response showing the results of the self test A zero response indicates that self test passed A value other than zero indicates a self test failure or error The response syntax for the self test query id defined as bellow 0 Self test has completed without errors detected CPU Error The device has detected a problem in its CPU Code Error The device ROM firmware has a checksum error Wait to Continue Command Prevents an instrument from executing another command until the operation caused by previous command is finished sequential operation Operation Complete Command Sets bit 0 Operation Complete Message in the Standard Event Register when all pending instrument operations are finished SFG 830 p 39 Operation Complete Query e Place an
30. h blue symbols printed above The SHIFT LED will be on after pressing the SHIFT button At this time only the buttons with blue symbols are workable To release the SHIFT function press SHIFT again The Secondary Functions 1 SHIFT SWP CF Displays sweep center frequency 2 SHIFT DEFAU Gets back to the default status of SFG 830 3 SHIFT ARB Sets up arbitrary wave compiler 4 SHIFT DATA Displays the last 256 byte of ASCII data received by SFG 830 5 SHIFT GPIB Sets up GPIB on off status by using the arrows buttons in MODIFY column 6 SHIFT ADDR Sets up GPIB address range from 0 to 30 7 SHIFT LOCAL Switches RMT status to LOCAL status 8 SHIFT RS232 Sets up RS232 on off status and its BAUD RATE 9 SHIFT A Switches the blinking state between the number and the value of a point for inputting data while compiling the arbitrary wave 10 SHIFT V Switches the blinking state between the number and the value of a point for inputting data while compiling the arbitrary wave p 14 SFG 830 6 10 Setup of LIN or LOG Sweep SFG 830 can adopt freguency to sweep its function output for triangle and ramp waves The type of sweep can be set as linear or log sweep Select a main waveform by 4 or gt button in FUNCTION column Set triangle or ramp sweep mode by 4 or gt button in SWEEP MODULATION column Press LIN S or LOG S butto
31. h gt include lt string h gt p 26 int int void sig830 data 10000 main char cmd 40 int i j number double amp cycle phase double wave 10000 double t center span s if sfg830 ibfind dev8 0 printf cannot find SFG830 n exit 1 number 1000 amp 2 phase 0 cycle 1 SinePattern number amp 2 phase cycle wave number 1000 amp 2 phase 0 cycle 1 sinepattern number amp 2 phase cycle wave s pow 2 0 32 0 center 10 0E3 span 10 0E3 for iz0 i lt number i t span 2 0 waveli t center t 42 9496E6 datali lt 1ong s t sprintf cmd SOUR FUNC SOUR 5 n ibwrt dev cmd strlen cmd sprint cmd SOUR FUNC AMOD din number ibwrt dev cmd strlen cmd ibrd dev cmd 40 ibtmo dev T30s ibwrt dev char data long 4 number send waveforms data sprintf cmd SOUR MOD STAT 1 n ibwrt dev cmd strlen cmd SFG 830 7 Adjustment and Correction 7 1 Preparation Preheat the instrument for more than 30 minutes 0 The operation temperature should be 23 5 C and the humidity should be lower than PH80 The voltage should be a 15V 0 90V or b 5V 0 25V O If the voltage is correct then plug in Q2334 Q2520 and AD834 Press Shift 9 8 3 0 then all the calibration values will be cleared 7 2 Adjusting Clock Set Conditions Fun
32. ion sine triangle ramp square 10mHz 10kHz Internal biu 50kHz max external Modulation Span 0 100 Ext Input 5V for 100 modulation Modulation Ext Input Impedance 100 KQ FM Function Sine Triangle Ramp Square 10mHz Modulation Span 30mHz 100kHz for triangle ramp PSK Span 360 degrees Modulation Rate 20Hz 10kHz GPIB interface optional Arbitrary waveform composer software for Windows optional GTL 101 x1 Instruction Manual x 1 100 120 220 240V AC 410 50 60Hz 214 W x 89 H x 370 D mm Approx Sig SFG 830 p 7 5 Front and Rear Panels Front Panel i H f H dd eccl GODI OOo E Nd Wa Dys NSI LAS Xu BB ER E a S M j 2 N UL N vY Suv WY 901 SMN GOW O 8 93S BMOLV83N3O9 NOILONN4 OIZISIHLNAS LE MU N Ww SUN g dil dOlS WIS NS SFG 830 p 8 POWER button UNIT keys gt SHIFT key ENTRY keys SWEEP MODULATE keys 40 A Parameter display 12 MODIFY keys 7 FUNCTION keys MAIN OUTPUT BNC 9 SYNC OUTPUT BNC Interface LEDs Unit Function LEDs Push in the button then the power will be supplied and the display will light up The power is off when push the button again to the flat position In Normal mode these keys are used to assign the unit and to set the entered value For example y
33. luding standard RS232 and optional GPIB to fulfill your requirement of automatic test and control lt The arbitrary waveform function offers 12000x12bits data length for free compiling The user can compile not only with keys on the front panel but also through a compiling software Arbitrary Waveform Composer Software for Windows optional SFG 830 p 5 4 Specifications Output Function Sine Triangle Ramp Sguare Sync Output Arbitrary 20mHz 30MHz 20mHz 30MHz Sine Square Triangle Ramp 5 ppm year Source Impedance 500 t 10 Range 10mV 10Vp p into 500 8 amplitude ranges Vac peak Vdc lt 5V Resolution 3 digits 0 5dB 45mV Sine out 12 45mV Square out 5 45mV Triangle out 5 5mV Arbitrary out 5V into 50Q Vac peak Vdc lt 5V Resolution 3 digits Accuracy Range Accuracy 1 5 of setting 1mV Sync Output TTL levels Sync Fan out gt 10 TTL load 100kHz 50dBc 1MHz 40dBc 10MHz 30dBc 30MHz 25dBc Rise Fall Time lt 15ns Harmonics Square Output Overshoot lt 5 at full scale output Asymmetry 1 of period 4ns Triangle and Ramp 0 1 of full scale output p 6 SFG 830 Sample Rate 42 949600MHZ N N 8 10 12 2 habi Waveform Length 12 000 points max aveforms Vertical Resolution 12 bits Sweep Function Line or Log Sweep Range 20mHz 30MHz Sweep Time 0 01S 1000S AM Modulation External Internal Funct
34. n O Press RATE to set up sweep RATE TIME range 0 001Hz 1kHz Press STAR and STOP buttons to set up the starting and ending sweep frequency This can also be done by pressing SWP CF and SPAN Press MOD ON OFF to initiate sweeping Note Please refer to the example in next page for the setup of LIN Sweep Example of the Setup of LIN Sweep To set the following conditions Output function sine Stop frequency 10kHz Sweep waveform ramp Speed 1 second Start frequency 1kHz Procedure Use 4 or gt button in FUNCTION column to select SINE waveform 0 Then use 4 or gt button in SWEEP MODULATION column to select RAMP waveform Press LIN S button O Press RATE 1 Hz Press STAR 1 kHz first then press STOP 1 0 kHz O Press MOD ON OFF to start sweeping Example of the Setup of LOG Sweep To set the following conditions Output function sine Stop frequency 10kHz Sweep waveform ramp Speed 0 1 second Start frequency 1kHz Procedure 9 Use 4 or gt button in FUNCTION column to select SINE waveform 0 Then use 4 or gt button in SWEEP MODULATION column to select RAMP waveform Press LOG S button O Press RATE 1 0 Hz Press STAR 1 KHz first then press STOP 1 0 KHz Press MOD ON OFF to start sweeping SFG 830 p 15 Note
35. of this instrument 5Vpp Max This is the BNC connector for amplitude modulation input The modulation index is 100 when 45 is input The input resistance is 100kQ The optional GPIB IEEE488 2 and SCPI communication interface should be plugged here This is the port of serial RS232 interface The DCE and Baud rate is among 300 19 2k 6 1 The Setup of Output Function Use the two buttons 4 or in the FUNCTION column on front panel to select an output waveform Available waveforms are arranged in sequence SINE SQU TRIG RAMP and ARB from left to right 6 2 The Setup of Frequency Press FREQ button 0 Key in the desired value of frequency Select a proper unit button to specify the value Example To set frequency at 250Hz press FREQ first then key in 2 5 0 and press Hz The frequency range of waves 0 02Hz 30MHz Square 0 02Hz 30MHz Triangle 0 1Hz 100kHz RAMP 0 1Hz 100kHz 42 949600MHz N N 8 10 12 2 6 3 The Setup of Amplitude Press AMPL button 0 Key in the desired value of amplitude Select a proper unit button to specify the value Example To set amplitude at 5Vpp press AMPL first then key in 5 and press Vpp SFG 830 p 11 6 4 The Setup of Offset Press OFFSET button 0 Key in the desired value of offset Select a proper unit button to specify the value Example To set offset at 1 2Vpp press OFFS
36. on in FUNCTION column to select SINE waveform Press PM button Press RATE to set up sweep RATE TIME range 20Hz 10kHz O Press PHASE to set Phase Span range 0 360 Press MOD ON OFF to start performing modulation Example of the Setup of PM Modulation To set the following conditions Main waveform sine Rate 100Hz Frequency 10kHz Angle 100 PSK modulation Procedure Use lt or gt button in FUNCTION column to select SINE waveform Press FREQ 1 0 kHz buttons to set the frequency of the wave Press PM O Press RATE 1 0 0 Hz Press PHASE 1 0 0 DEG to set the phase to be 100 O Press MOD ON OFF to start performing modulation Note Different sequence of the steps taken will not make any change on the execution and the result 6 14 The Commands of GPIB Serial Interface This section explains the GPIB commands that applied by SFG 380 All the 69 commands including 54 instrument commands and 15 IEEE488 2 common commands correspond to the SCPI syntax The syntax function and parameter of all the commands are listed below It is helpful for you to control the remote instrument through either GPIB or RS232 Example ibwrt k IDN ibwrt SOUR FREQ SYNT 1000 ibwrt SOUR FREQ STAR 1000 SOUR FREQ STOP 10000 ibwrt SOUR FREQ STAR 1000 STOP 10000 p 18 SFG 830 1 Common Comman
37. ookout table ROM or RAM a Digital to Analog Converter DAC and a Lowpass Filter LPF The amount in a phase accumulator is controlled by the freguency control word K which will be added by 1 after each system clock cycle 1 fs The output of the accumulator is used to position the data in the Table ROM or RAM The digital data will then be converted into a smooth analog waveform after passing through the DAC and LPF 3 Features SFG 830 is a functional signal generator that applies DDS Direct Digital Synthesis technique and can generate frequencies at a resolution of 20mHz with a high frequency accuracy of 10ppm Its main signal source can generate waveforms of sine wave square wave triangle wave ramp wave and arbitrary wave lt The output frequency range and resolution of each waveform are Waveforms Frequency Range 20mHz 30MHz 20mHz 10mHz Triangle wave ramp wave 100mHz 100kHz Arbitrary wave 42 949600MHZ N where N 8 10 12 2 lt The depth of AM modulation 0 100 lt Sweep range 10mHz 1kHz lt With FM and PSK modulation functions and the users can choose the modulation signal source among sine wave square wave triangle wave ramp wave and arbitrary wave with modulation frequency up to 10kHz lt The digital modulation and sweep functions provide you a stable and high resolution 10mHz modulation environment lt SFG 830 has complete environment of computer interface inc
38. ou can use dBm Vrms and Vpp to set the output amplitude They can be used to set frequency MHz kHz Hz OFFSET PHASE etc In STOR or RECL modes they are used as Enter Press this key to set the shift mode and the SHIFT LED will light up For example press SHIFT DEFAU can recall the default value of this instrument 0 9 and keys are used to input value A unit key should be pressed to set the entered value CLR key is used to delete the entered value entirely and bring back the previous value STOR key stores the settings into memory RECL key recalls the system settings from memory These keys control the functions of sweep and modulation 4 and gt keys select the carrier waveform AM FM and PM keys set the mode of modulation LIN and LOG keys set the sweep method MOD ON OFF initiates sweep or modulation function As to the functions of STAR STOP SPAN and RATE keys please refer to the instruction in Chapter 6 These keys set the size and the increasing or decreasing mode of steps These keys controls the output functions 4 and gt keys select the output signal from arbitrary wave ARB sine wave triangle wave etc FREQ key sets the frequency of output AMPL key sets the amplitude of output OFFSET key sets the DC level of output PHASE key sets the phase in PSK modulation mode This is the BNC connector that o
39. raordinary resolution Unlike SFG 830 traditional freguency synthesized function generators typically use Phase Locked Loop PLL techniques In order to synthesize frequencies PLL should be high resolution up to 1 109 in general and needs a stable frequency to be reference Due to the utilization of dynamic loop filter problems such as poor phase jitter and frequency switching response may occur when running the PLL system As in generating waveforms PLL needs a wave shaping circuit with an address counter that controlled by a variable frequency clock The counter addresses memory locations in a waveform RAM and the RAM output is converted by a high speed digital to analog converter DAC to produce an analog output signal Problems like poor phase jitter and transient response may arise here as well Although DDS also generates analogue waveforms by way of the waveform RAM and high speed DAC it does not have the problems as PLL does due to the use of fixed frequency clock fs Besides the resolution of DDS is higher than that of PLL s DDS s resolution is fs 2 where the digit of the control frequency word K which is more than 32bits in general decides the quality of it Graph1 indicates the fundamental construction of a DDS frequency synthesizer K Frequency Control Word 32 System Clock 24 ROM or RAM 12 Digital Analog p 4 SFG 830 A DDS freguency synthesizer consists of a phase accumulator a l
40. re input pins Do not connect the output line of one DTE device to the output line of the other Ensure that the signal ground of the equipment is connected to the signal ground of the external device When connecting the equipment to another RS 232 Ensure that the chassis ground of the equipment is connected to the chassis ground of the external device 25 PIN D SHELL cs He po SUD DS RNA No Connection Receive Data RxD Transmit Data TxD No Connection No Connection No Connection Signal Ground No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection No Connection input output GND Figure 1 Pin Assignments of the RS 232 Connector DB 25 D Female SFG 830 p 43 9 PIN D SHELL No Connection Receive Data RxD input Transmit Data TxD output No connection Signal Ground GND No connection No connection No connection No connection GEO S ED ANS Figure 2 Pin Assignments of the RS 232 Connector DB 9 D Male DB25 to DB25 DB25 to DB9 DB25 to DB9 This wiring configuration is used for computers with DB 25 D connectors configured as Data Terminal Equipment EQUIPMENT COMPUTER DB25 DTE DB25 DTE Pin 4 Pin2 Pin
41. s of IEEEA488 2 eee 38 Appendix 2 RS 232 Wiring Configuration 43 EC Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD 1 NO 95 11 Pao Chung Rd Hsin Tien City Taipei Hsien Taiwan 2 Plot 522 Lorong Perusahaan Baru 3 Prai Industrial Estate 13600 Prai Penang Malaysia declare that the below mentioned product SFG 830 is herewith confirmed to comply with the reguirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic Compatibility 89 336 EEC 92 31 EEC 93 68 EEC and Low Voltage Eguipment Directive 73 23 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Eguipment Directive the following standards were applied EN50081 1 Electromagnetic compatibility EN50082 1 Electromagnetic compatibility 1992 Generic emission standard 1992 Generic immunity standard Part 1 Residential commercial and light Part 1 Residential commercial and light industry industry Conducted EN 55022 class A Electrostatic Discharge IEC 1000 4 2 1995 Emission Radiated Emission 1994 Radiated Immunity IEC 1000 4 3 1995 Current Harmonics JEN 61000 3 2 A12 1996 Electrical Fast IEC 1000 4 4 1995 ransients Voltage EN 61000 3 3 1995 Surge Immunity IEC 1000 4 5 1995 Fluctuations Gee ni ME Ni ee Voltage Dip Interruption JEN 61000 4 11 1994
42. s on the left side represent the Calibration Number and the right hand figures are the corresponding Calibration Value The blinking area is where you can input figures and can be switched by pressing the 4 and gt keys in FUNCTION column SFG 830 9 Use A and W keys in MODIFY column or press numeric keys 0 9 to input the desired value Example i If the display shows 00001 1000 and 00001 blinks it means that the Calibration Number is ready for input Press FUNCTION gt key once then 1000 becomes blinking and you can input the Calibration Value Press FUNCTION 4 key once then 00001 will blink again ii Press 4 0 6 and Enter keys will get to the Square Wave Symmetry Calibration mode and the Calibration Value is 2000 Press FUNCTION P key once and 2000 will be blinking Just input the desired figures then the symmetry of square wave will be changed The table below lists the corresponding Calibration Numbers to Calibration items Manual Calibration Amplitude of Triangle Wave Symmetry of Square Wave 406 502 Sine DC Gain Calibration Square DC Gain Calibration wm A Triangle DC Gain Calibration Vo GANDraNoN Offset Adjustment 506 602 The procedure of manual calibrating with software is as follows 1 Positive Attenuator Calibration To calibrate the positive attenuator you should go through Calibration Number 1 8 in turn and perform the following 3 steps for each number
43. the output voltages of Amplitude Control thus achieve the modulation effect 6 Sweep a Sine wave and Square wave As to the sine wave sweep the input data will be calculated by MPU and be written in RAM I 8kx8 DDS2 will then send a fixed frequency to read the sweep data from RAM I and send it to DDS1 through the Bus Selector The digital sine wave signal generated from DDS1 will pass DAC 9 level LPF F D Amplitude Control Output Amplitude ATT then output via DUT The procedure of square wave sweep is similar to the above one except that the digital signal generated from DDS1 passes a Square Waveform Comparator between the F D and Amplitude Control b Triangle wave and Ramp The input data will be calculated by MPU and be written in RAM II DDS1 will then send a B11 control frequency to read the sweep data from RAM II Afterwards the signal will pass the Bus Selector DAC 7 level LPF Amplitude Control Output Amplitude ATT then output via OUT BNC 7 FM Modulation The principle of FM modulation is the same as that of Sweep except that the data stored in RAM I is relevant to FM modulation SFG 830 p 37 Appendix 1 Commands of IEEE488 2 gt IDN Identification Guery e After receipt of this guery the instrument generates response message as below The response consists of the following four fields Manufacture Model Serial Number return 0 if not available firmware Revision r
44. this instrument all the disassembling adjusting and maintenance should be performed by a professional technician If the instrument have to be opened or adjusted under some unavoidable conditions it should be carried out by a technician who is familiar with SFG 830 Once there is any abnormality please contact our company or the agency near you 4 Power Supply AC input should be within the range of line voltage 10 50 60Hz To prevent the instrument from burning up be sure to check the line voltage before turning on power SFG 830 p i 5 Grounding To avoid electrical shock the power cord protective grounding WARNING conductor must be connected to ground SFG 830 can be operated only with an earth grounded AC power cord that connects the case and ground well This is to protect the user and the instrument from the risk of shock hazard 6 Fuse Replacement For continued fire protection replace fuse only with the WARNING specific type and rating Disconnect the power cord before replacing fuse The fuse blows only if there is anything wrong with the instrument and SFG 830 will stop working under this situation Please check the cause of it then replace an proper fuse as listed below Be sure to use the correct fuse before changing the applying voltage 90V 132V T 0 8A 250V 198V 250V T 0 5A 250V F101 102 T1A 250V F103 104 T2A 250V Check the line voltage setting on the rear panel If the line voltage se
45. tting does not match the one of your area change the line voltage setting according to the following steps 1 Open the cover of AC socket with flat blade screwdriver 2 Remove cam drum rotate to correct selection and reinsert 7 Cleaning the Cabinet Disconnect the AC power cord before cleaning the instrument Use a soft cloth dampened in a solution of mild detergent and water Do not spray cleaner directly onto the instrument since it may leak into the cabinet and cause damage Do not use chemicals containing benzing benzne toluene xylene acetone or similar solvents 8 Operation environment Indoor use Altitude up to 2000m Temperature to satisfy the specification 18 C 28 C 64 4 F 82 4 F Operating temperature 0 C 40 C 32 F 104 F Storage temperature 10 C 70 C 14 F 158 F Relative humidity up to 90 when 0 C 35 C up to 70 when 35 C 40 C Installation category Pollution degree 2 9 Place SFG 830 in a location of satisfied environment as stated above free from dust direct exposition of sunlight and strong effect of magnetic fields p 2 SFG 830 10 For United Kingdom As the colours of the wires in mains leads may not correspond with the coloured markings identified in your plug appliance proceed as follows NOTE The wire which is coloured Green and Yellow must be connected to the F Earth terminal marked with the letter E or by the earth symbol or This l
46. utputs all main signals Output resistance is 500 This is the synchronous output BNC connector that outputs a TTL level signal These LEDs indicate the current status when operating with the GPIB interface bus This 11 digit display presents the parameter values and information about the current status These LEDs indicate the unit of the figures on display and the functions that are currently being used SFG 830 p 9 Rear Panel O aie OT ZH 09 08 VA 06 LHS LHY OL 1 LAS po god gu BE BB e sug sz do pp zezsu SLIVM SZ VIH Odd 190 0iG 00 13 Gid9 390 3SN4 ONIJVIAIH 340338 ONOJ N3MOd 193NNOOSIG 000000000000 Q3ldio3dS SW o0000oooooccooco 3SNd J9Vldi d Yon T ONILVA JSN p em 4 BNNOSM3d OJUTVNO OL ONOJAJS 3 38 SH3A00 MOMIN LON 0G 3GSN SLNSNOGNOD 718394435 301 V8340 ON SNIVS ONY 34A GUIS Hi JO 3504 AOST HIM AINO 3SN IVI NOULO3IONd JAH GIANLNOO 303 ZONNOB9 OL 3193NNOO 38 ISAM NOLONONOO SNIONDONO AUJJLOKA G09 NIMO IHL MJOHS IRILITE GIOAV OL ONINSVM S indino NOLLYINGOW SFG 830 p 10 1 Power Entry model 2 Sweep Modulation output 3 EXT AM Input 4 GPIB connector 5 RS232 connector 6 Operation This is the AC power input terminal AC input should be within the range of line voltage 10 50 60Hz This terminal outputs the modulated waveform that is synchronous with the Sweep Modulation function
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