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Function Generator
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1. ee eeeeee ec eeeeee eee ee nennen 36 6 19 THE SYNC Signal Output Function ec eeeeeee eec eeeee rennen nennt 36 6 20 Remote Control RS232 Interface eeecceeee eec scere eene enne 36 6 21 Commands SyhlaX iiscceeio se eue ena da ias 38 6 22 The Commands of RS 232 Serial Interface sss 41 6 23 The Examples of the Communication Interface Software 44 6 24 The Error message of instrument eee eere eere nennen 47 7 Adjustment and Correction 1111 eee eei LLee LLL Lee ecc Lreeec nein eene aan nna a naa a n raan 48 LA POW AN AIO eem 48 7 2 Adjust and Check up the operation DC Voltage 48 7 3 Adjusting Main CLOCK Cm 49 7 4 Adjusting Sensitivity of counter ccccsssseesssenseeeecenseeeeeenseeeseeseeeseeesnessoenneees 49 7 5 Adjusting VCF Function 100 1 sacarina cies smecceseedetaaweseaiatntesiencsinee s 49 7 6 Adjusting Main Frequency Duty Cycle and GCV Output Check 49 7 7 Adjusting Hise Fall TIMO iii td it e etes 50 7 8 Adjusting Main Sine wave Harmonic Distortion 50 7 9 Adjusting Modulation source cccccceeseeseeneeceeneeseenseeseeseeeeeneeseensessonsees
2. STOP STOP Press SHIFT l SLARI ETT in sequence O Press MOPION J When the MOD ON key is pressed The Display area will show reminding message The detail as below If the input sweep ranges out of correct range The instrument will according to start and stop frequency to suggest possible sweep range In this sample The message of 15Hz 1500Hz or 15kHz 1500kHz range will be provided Because the input start frequency is at 100Hz so 15Hz 1 5kHz can match up the requirement Besides the stop frequency is at 1MHz so 15kHz 1 5MHZ is close to range requirement After show the message The Display area will back to original state Before press the button Sua AN stat FIND V EM IND V 454500 Er I5 4500 E 13 E 13 QE 13 GFG 3015 6 11 Setup of AM Modulation The AM modulation function offers internal sine square and triangle ramp signals Besides You can select the modulation signal from external Modulation Trigger Input BNC O Set the main output function by using FUN Y button O Set the main output frequency by using 9 button and number keys Set the main output Amplitude by using MFE button and number keys FM O Select the modulation mode by using M button INT EXT Select the modulation signal source by using SHIFT RATE INT EXT O Press RAE hio set up modulation RATE value Range 0 01Hz 10kHz SOURCE O Select the modulat
3. Set Conditions Modulation Source Sine Rate 1kHz SYM 50 Modulation ON Use the Counter to measure the Modulation Sweep Output and Check the value of full rate frequency from 0 01Hz 10kHz The frequency accuracy must be smaller than 5 1 count 7 9 2 Adjusting Sine wave Harmonic Distortion Set Conditions Modulation Source Sine Rate 1kHz SYM 50 Modulation ON O Set the Distortion meter Or Audio analyzer to 50 2 load to measure the Modulation Sweep Output Adjust VR680 and VR690 until the minimum distortion harmonic is reached O Check the value of full frequency from 10Hz 10kHz that must be smaller than 290 7 10 Adjusting AM modulation 7 10 1 Adjusting Modulation Balance Set Conditions Function Sine Wave Amplitude 0 1Vp p Duty Cycle 50 Frequency 1MHz Modulation Source Sine Modulation Type AM SYM 50 RATE 1kHz Span 10096 Modulation ON O Set the oscilloscope to 20mV DIV 0 5ms DIV and 50 load to measure the output e Adjust VR800 until the positive cycle and negative cycle reach the same level O Check whether the positive cycle and negative cycle reach the same level or not at 8Vpp amplitude 7 10 2 Adjusting Span DC offset and Amplitude the ASP 1 will be shown on the up side display Parameter display Area A and the 2400 will be shown on the down side display Parameter display Area B The Down side figures are the corresponding Calibration values which can us
4. IDN Should return the Manufacturer model number and firmware version in the following format GW GFG3015 V 1 00 lf you do not receive a proper response from the GFG 3015 please check if the power is on the RS232 configurations are the same on both sides and all cable connections are active 6 21 Commands Syntax If you want to transfer any of the instructions to an instrument there are three basic elements must be included e Command header o Parameter if required e Message terminator or separator Command Header The command header has a hierarchical structure that can be represented by a command tree p 38 GFG 3015 SOURCe 4 Root node AA SWEep WAVeform Lower lev el nodes SYM SPACing 1 2 ado Leaf node Linear LOG The top level of the tree is the root level A root node is located at the root level A root node and one or more lower level nodes form a header path to the last node called the leaf node The command header is configured by header path and leaf node The below Figure shows the command header for the leaf node indicated SOURce SWEep SPACing Root Node Header Path Leaf Node Command Header Parameter If the command has parameters the values have to be included In this manual when we express the syntax of the command the lt gt symbols are used for enclosing the parameter type For instance the syntax of the command in the following Figure i
5. O Select the Trigger type by pressing e vvr button Select the Trigger signal source by pressing RS x1 button INT EXT O Press RAT to set up Trigger signal RATE value Range 0 01Hz 10kHz SWP CF O Press Jo set the Duty of Internal trigger signal Range 90 10 90 Select the Trigger start Phase by pressing PHASE button and number keys GFG 3015 offers 90 80 range for internal trigger mode Press RICON m start performing Trigger function Note 1 Please refer to the setup of Trigger function as the example below GFG 3015 2 When the Trigger signal source from external is selected the Rate Phase and Symmetry will disable as those functions are workable on internal trigger mode only 3 lt won t make any change on execution and result by taking different step sequence 4 The Trigger function of GFG 3015 must meet the important setting condition with the Main frequency higher than Trigger rate frequency Example of the Setup of Trigger Function To set the following conditions Main function Sine Wave Main Frequency 5kHz Main Output Amplitude 10Vpp Trigger type Multi trigger Trigger Source INT Trigger Signal rate 1kHz Trigger Phase 30 Trigger Signal Symmetry 50 4 4 4 4 4 4 4 e Procedure O Press FUNC hio select SINE wave for main output O Press AMFL EET Ji sequence Then press FRE E ovs Ji sequence Press BENI hi
6. Example of the Setup of GATE O The detailed calculate formula of GATE function as below 1 Trigger Rate period Gate period 2 Symmetry of Trigger signal 100 Gate period Open Gate time Gate period x100 O The Gate period gt Open Gate time e Set the Trigger Type to Multi Trigger type e Because the Frequency and Symmetry of Trigger signal have their own accuracy that is different than main frequency therefore when the above formula is used to calculate the Open Gate time the value might have to be modified to close your desire It s a normal phenomenon that the Open Gate time may have less accuracy than your wish To set the following conditions for Gate function Example Main function Triangle Wave Gate period 10mS Main Frequency 1kHz 1mS Open Gate Time 6mS Main Output Amplitude 10Vpp Procedure O The calculation of setting 1 Trigger Rate Gate period 10ms 100Hz 2 Symmetry of Trigger signal 100 10mS 6mS 10mS x100 60 Press FUNC hto select Triangle wave for main output Press AMPL 1 0 NETT Jin sequence Then press FREO 1 Ei in sequence Press iia hto set Trigger Type to Multi Trigger Press Merx hto select the source from internal signal 0 00 GFG 3015 p 31 INT EXT e Press ENTE J 1 J 0 J 0 J Hz Vpp jin sequence SWP CF e Press SYM J 6 J 0 J DEG Jin sequence Press PHASE J 0 J DEG Jin sequence Press TRIG ON J The
7. se onoono krz OvER Mirar TES 0 Sec Lese a ve OVER 100M H Tio seo 000 000 kA DVER Note When OVER OVER LED is light on The means that there are still more values than 6 digits on the Display User can set more high Gate time to check it Example of the External Counter To set the following conditions Counter mode External Procedure INT EXT O Press SHIFT GATE to select External source for Counter mode Connect the testing signal with Counter Input BNC connector INT EXT Press CATE ho select the Gate time of you need The correct frequency will be displayed Parameter display Area A GFG 3015 p 33 6 16 THE VCF Function The GFG 3015 also provides the function of Voltage control frequency VCF Input a voltage from O to 10V to the instrument can change the main output frequency In other word put a different input voltage will get a different main frequency Basically If user put a voltage that from O to 10V to instrument then the variation of main frequency will over 100 times But that just appear in Same Frequency variation Range Because whole frequency range 0 01Hz 15MHz of GFG 3015 is composed of 8 frequency range The detail is as below So User s voltage just can control at same frequency range For example User can t make the main frequency to 10kHz on range 7 by VCF input voltage It must change to range 6 or 5 1 5001 MHz 15 0000MHz 150kHz 15MHz
8. to move flash digit to 2 position Then turn the Rotate Knob clockwise until the digit become to 8 6 4 The Setup of Amplitude O Set to Main Amplitude entry mode by pressing M button to now the LED In parameter display area B will be flashing O Key in the desired value of Amplitude Select a proper unit button to specify the value O In addition you can use lt i d ha the Rotate Knob to modify the main Amplitude value you need Example of the Setup Amplitude 1 To set Amplitude at 8 Vpp Press AMPL Jit then key in 8 hna press Pe J 2 To modify the Amplitude to 5 Vpp Press lt 4 Jor Jto move flash digit to 8 position Then turn the Rotate Knob anti clockwise until the digit become to 5 The input limit 1 Amplitude should be among 0 01 10Vpp 2 Offset should be among 5Vpp 3 AMPL 2 x OFFSET lt 10Vpp 6 5 The Setup of Offset O Set to main DC offset Voltage entry mode by pressing OFFSET f button now the OFFS LED In parameter display area B will be flashing O Key in the desired value of DC offset voltage Select a proper unit button to specify the value In addition you can use and the Rotate Knob to modify the main DC offset voltage value you need Example of the Setup Offset 1 To set DC offset voltage at 1 Vpp Press ONE Jit then key in Jana press Hz Vpp J 1 2 To modify offset voltage to 2 Vpp Press jor gt
9. AMPL Jj Key is to set main amplitude entry mode Key in the desired value of voltage by using the number keys or Modify keys and Unit keys When the key is pressed the LED on parameter display area B will be flashing until other mode is set OFFSET Y Key is to set main output offset voltage entry mode Key in the desired value of voltage by using the number keys or Modify keys and Unit keys When the key is pressed the LED on parameter display area B will be flashing until other mode is set DUTY Jj Key is to set main output Duty Cycle entry mode Key in the desired value of percentage by using the number keys or Modify keys and Unit keys When the key is pressed the LED on parameter display area B will be flashing until other mode is set MOD ON f Key is to start performing Amplitude Modulation Frequency Modulation or Sweep function When the key is pressed again the functions will stop When the key is pressed the LED on MOD SWP Function LED area will light up press again the key the LED will be off These keys control the functions of sweep and modulation SOURCE SPAN Jj Key is to set Span of Modulation or Sweep entry mode and choose the source of modulation If set to source choose function must use Secondary Function mode ex Key is to choose the type of modulation between AM and FM If want to set to FM function must use Secondary Function mode INT EXT cA J key is to set Rate of Modulation Sweep or
10. ON Set the oscilloscope to 2V DIV 1us DIV and 50 load to measure the main output The Span of FM modulation must be 215 now The maximum frequency must be 115kHz The minimum frequency must be lt 85kHz GFG 3015 p 53 7 11 2 Adjusting the LOG sweep Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 10kHz Sweep Type LIN Start Frequency 150Hz Stop Frequency 15kHz RATE 10kHz Modulation ON O Set the oscilloscope to 5V DIV 20us DIV to measure the MOD Output BNC Record the positive peak level value of the waveform O Change the Sweep type from LIN to LOG 8 Adjust VR720 until the positive peak level value reaches the same level as step Q Check the amplitude which must be over 10Vpp 7 11 3 Adjusting the Span of Sweep the CaL will be shown on the display A Parameter display Area A the LIN or LOG will be on the display B Parameter display Area B Now the GFG 3015 is in calibration state O Wait about 5 minutes the instrument will be back to original state That means the calibration is completed 7 11 4 Check the Modulation Output Q Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 100kHz Modulation Source Sine Modulation Type FM SYM 5096 RATE 1kHz opan 1596 Modulation ON O Set an oscilloscope to 1V DIV 0 5ms DIV to measure the MOD Output BNC The BNC connector will output 1kHz sine
11. fto move flash digit to 1 position Then turn the Rotate Knob clockwise until the digit become to 2 The input limit 1 Amplitude should be among 0 01 10Vpp 2 Offset should be among 5Vpp 3 AMPL 2 x OFFSET x 10Vpp GFG 3015 p 19 6 6 The Setup of Duty O Set Duty cycle of Main output entry mode by pressing PUTY J button the DUTY LED In parameter display area B will be flashing O Key in the desired value of Duty cycle Key in the specific value by Unit button In addition you can use lt E Jana the Rotate Knob to modify the Duty cycle of Main output value you need Example of the Setup Duty 1 To set Duty cycle at 60 Press DUTY first then key in E J and press DEGI J 2 To modify Duty cycle to 30 Press or BB to move flash digit to 6 position Then turn the Rotate Knob anti clockwise until the digit become to 3 The input limit 80 20 80 at 1MHz 6 7 The Setting of STORE The Store button is used to save the setup parameters of the instrument into its memory with the stored group number from O to 9 up to 10 groups totally RECL O Push R j button O Key in the group number from O to 9 Press any button from_PEG On ES or Hzvep to complete the setting Example of the Setup STOR To save a parameter to the RAM of group 5 RECL Press STOR first then key in 5 and press 2 Vpp J 6 8 The Setting of RE
12. 78Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 240 250kHz 9MHz 7 13 10 Amplitude Calibration 3 of Triangle Calibration Number from 265 277 To calibrate the Amplitude for triangle wave from 12MHz to 15MHz range You should go through Calibration Number 265 277 in turn and perform the following 3 steps for each number O Set the Calibration Number Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 9 62Vpp 9 78Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 265 250kHz 12MHz p 60 GFG 3015 7 13 11 Amplitude Calibration 1 of Square Calibration Number from 278 337 To calibrate the Amplitude for square wave from 250kHz to 15MHz range You should go through Calibration Number 278 337 in turn and perform the following 3 steps for each number O Set the Calibration Number Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 6 44Vpp 6 56Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 278 250kHz 2
13. GATE Function will perform on output terminal Please see Figure 4 In addition you can use 4 J gt Jand the Rotate Knob to modify the value of Trigger signal Symmetry and set the Open Gate Time you need Note 1 It won t make any change on execution and result by taking different step sequence 2 Use suitable external signal to set the GATE function you need Figure 3 Figure 4 6 15 Setup of External Counter The GFG 3015 provides a high performance external frequency counter and with 6 digits counter and up to 150MHz high frequency range with high resolution O Press SHIFT mes button the and one of the Gate time indicated LEDs will light lp Algo ne GATE will be flashing according to the Gate time of Counter In Counter Functions LEDs area Now the external counter is in enabling status INT EXT O When the EUN is pressed the Gate time LEDs will be according to the cycle of 0 01S 0 1S 1S and to display The Different Gate time will provide different resolution of counter So users can use the key to choose whatever the resolution they need The detailed relation among the Test frequency the Gate time the State LEDs and minimum resolution is as below Input Test Frequenc Gate Time Display Value State of LEDs Resolution 0 01 Sec 1 0000 100 u Hz 0 1 Sec 1 00000 10 u Hz p 32 GFG 3015 40 Sec 000 000 faba OVER Lese ommo Fa OvER oore OF MON mm 11sec 0 00000 MHz OVER
14. Number of Range Setting Frequency Range Range 150 01kHz 1 50000MHz 15kHz 1 5MHz 15 001kHz 150 000kHz 1 5kHz 150kHz 1 5001kHz 15 0000kHz 150HZ 15kHz 150 01Hz 1 50000kHz 15Hz 1 5kHz 3 15 01Hz 150 00Hz 1 5Hz 150Hz 1 51Hz 15 00Hz 0 15Hz 15Hz 0 01Hz 1 50Hz 0 01Hz 1 5Hz The input voltage must be input with VCF BNC connector If need to change The frequency variation range proceed 6 3 The Setup of Frequency to modify the main setting frequency Example of the Setup of VCF p 34 To set the following conditions Main function Sine Wave Hope that Main output will output Main Output Amplitude 10Vpp 10kHz on External VCF function Procedure O Press NS hio select SINE wave for main output O Press ae os Jo Jos in sequence Then press 5 9 i 2 See lin sequence to choose suitable main output frequency for corresponding VCF Frequency variation Range Input about DC 9V to VCF input BNC connector You will get about 10kHz sine signal from Main Output connector Also you can get 10kHz from VCF frequency variation range with the same procedure as above description by setting different value of input VCF voltage Please refer to the following GFG 3015 1 Press FREQ 1 5 e in sequence to choose suitable main output frequency for corresponding VCF Frequency variation Range 2 Input about DC 3 3V to VCF input BNC connector 3 You will get about 10k
15. TTL compatible input level Range TTL Output GCV Output To set the voltage between 0 2V to 2V as per different Frequency in Same frequency Range INT EXT Switch Selector Range oHz 150MHz EXT Accuracy Time Base 10MHz Accuracy 1 count 20ppm 23 C 5 C after 30 minutes Time Base Frequency Counter 2am e The maximum resolution is 100nHz for 1Hz and 1Hz for 100MHz Input Impedance 1MQ 150pF 35mVrms 5Hz 100MHz 45mVrms 100MHz 150MHz Resolution Sensitivity Wtehae RSER O O Dimensions 290 W x 142 H x 346 D mm GFG 3015 p 9 5 Front and Rear Panels I o qe l TES mE LE go O I Os mg EDT e YOO Gede HOW 1 iiis gi E i o 3 q ste T E 3 o eT M p 10 GFG 3015 DO O OOM ENE Ww 1 POWER button 2 Main Function keys 3 Modulation Sweep Function keys Push the button to turn on the power and the display is activated Push again the button to turn off the power FUNC Jj Key is to set main output waveform in the cycle of Sine Triangle and Square When the key is pressed the related waveform LEDs will light up accordingly FREO f Key is to set main frequency entry mode Key in the desired value of frequency by using the number keys or Modify keys and Unit keys When the key is pressed the LED on parameter display area A will be flashing until other mode is set
16. Trigger entry mode and choose the signal source of Modulation Sweep or Trigger If want to set to signal must use Secondary Functions mode GFG 3015 p 11 4 System keys 5 Unit keys GFG 3015 STOP START f Key is to set Start Frequency of Sweep entry mode and Stop Frequency of Sweep entry mode If set to Stop Frequency of Sweep entry mode must use Secondary Functions mode LOGS LIN S Key is to choose the type of Sweep between liner sweep and LOG sweep If set to LOG sweep must use Secondary Function mode WP CF SYM JjKey is to set the Duty cycle of Modulation Sweep or Trigger source entry mode Key in the desired value of percentage by using number keys or modify keys and Unit keys If want to set to center frequency of Sweep function that must use Secondary Functions mode When the key is pressed the LED on parameter display area B will be flashing until other mode is set When you use center frequency entry mode then the LED In parameter display area A will be flashing until other mode is set The detail operation of these keys Please refer to the instruction in next Chapter RECL stor f Key is to save or reload the setup parameters of the instrument into or take out from memory the selected nupAbers is from O to 9 up to 10 groups RS232 Rv37 jg Key is to start performing RS232 interface Press the key then use rotational knob to change function states ON or OFF Press the key again then u
17. division and press wor finish the step and proceed next step trg 90 Now the trg 90 is shown on the up side display and the 3700 is shown on the down side display Then input suitable Calibration values to set the trigger phase to 90 at negative peak and press HOLD Pto finish the step and proceed next step trg 80 O Now the trg 80 is shown on the up side display and the 2700 is shown on the down side display now Then input the suitable Calibration Value to make the trigger phase on 80 at 7 6 division Then press to fi mor fhis step and into next step trg 45 Now the trg 45 is shown on the up side display and the 2920 is shown on the down side display now Then input the suitable Calibration Value to make the trigger phase on 45 at 6 division Then press Hot nished this step and into next step trg 45 Now the trg 45 is shown on the up side display and the 3450 is shown on the down side display now Then input the suitable Calibration Value to make the trigger phase on 45 at 2 division Then press to fil mor his step The instrument will back to Original states after press this key now 7 12 2 Check the External Trigger input function Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 5kHz Trigger Source Exit Trigger type Single trigger Trigger Phase 30 Trigger ON O Inp
18. gl 3 H H lt H C 3 lt omV a 0 32V 0 5mV olo 10 O lt lt I a c 3 3 lt lt I AE 0 03V_ _ 0 33 lr O01V s O5mv S o GFG 3015 p 57 7 13 2 Attenuator Calibration of Sine Calibration Number from 34 49 To calibrate the Attenuator for sine wave You should go through Calibration Number 34 49 in turn and perform the following 3 steps for each number O Set the Calibration Number Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration Value to set the output to the specific value listed below Calibration Number The output should be Calibration Number The output should be 10 08Vpp 9 92Vpp 634mVpp 626mVpp 3 5 08Vpp 4 92Vpp L 332mVpp 328mVpp 5 08Vpp 4 92Vpp 322mVpp 318mVpp 2 52Vpp 2 48Vpp 172mVpp 168mVpp E X 2 52Vpp 2 48Vpp 49 162mVpp 158mVpp 2 39 1264Vpp 1 256Vpp 47 92mvpp 88mVpp 40 1 256Vpp 1 248Vpp 48 82mVpp 78mVpp 41 644mVpp 636mVpp 49 11mVpp 9mVpp 7 13 3 Attenuator Calibration of Triangle Calibration Number from 50 65 To calibrate the Attenuator for triangle wave You should go through Calibration Number 50 65 in turn and perform the following 3 steps for each number O Set the Calibration Number Set the oscilloscope to 50 2 load to measure the main output Key in an appropriate Calibration value to set t
19. on the down side display Set the oscilloscope to 2V DIV 0 2mS DIV and 500 load to measure the main output Input suitable Calibration values to set the span of modulation to 10096 then press HoLD fish the step and proceed next step ASP 6 O Now the ASP 6 is shown on the up side display and the 2610 is shown on the down side display Set the oscilloscope to 2V DIV 0 2mS DIV and 500 load to measure the main output Input suitable Calibration values to set the Amplitude to 100 then press moro jto finish the step and proceed next step ASP 7 Now the ASP 7 is shown on the up side display and the 2040 is shown on the down side display Set the DMM to DCV range and 50 2 load to measure the main output Input suitable Calibration values to set the DC offset to 0 000V then press gor j to finish the step and the instrument will be back to original state 7 10 3 Check the Modulation Bandwidth p 52 Q Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 100kHz Modulation Source Sine Modulation Type AM SYM 50 RATE 1kHz Span 100 Modulation ON 9 Set the oscilloscope to 1V DIV 0 2ms DIV and 50 load to measure the main output Then fine adjusting the vertical scale of oscilloscope until the amplitude is full of 8 divisions GFG 3015 Set Conditions Frequency 5MHz O The Amplitude of waveform must be over 6 divisions 7 10 4 Check the Modulati
20. on indicated that the value of display was Stop frequency of sweep function right now The CF LED light on indicated that the value of display was center frequency of sweep function right now GFG 3015 p 13 11 Parameter display Area B ra 12 Waveform Function LEDs 13 Counter Functions 14 Modulation Sweep LEDs Function LEDs p 14 GFG 3015 The FREQ LED light on indicated that the value of display was main output frequency right now The LED light on indicated that the value of display was rate frequency of sweep or modulation or trigger function right now The LED light on indicated that the value of display was Span frequency of sweep function right now The MHz kHz Hz and LED light on indicated that unit according current value of display This 4 digit Parameter display presents the parameter values and information about the current status and unit The LED light on indicated that the value of display was main output amplitude right now The LED light on indicated that the value of display was main output DC offset voltage right now The LED light on indicated that the value of display was main output duty cycle right now The LED light on indicated that the value of display was span frequency of modulation function right now The LED light on indicated that the value of display was modulation signal duty cycle of sweep or modulation or trigger function right now The LED light on indica
21. ramp waves The type of sweep can be set as linear or log sweep O Select a main waveform by using FUNC J button O Select a main output amplitude by using AMPL j button LOG S Select the sweep mode by using tins button INT EXT Im O Press RATE to set up sweep RATE value Range from 0 01Hz to 10KkHz GFG 3015 p 21 STOP Set the starting frequency by pressing START button and terminate sweep STOP frequency by pressing surr START J The start and stop frequency must be at the same sweep frequency range Please refer to the Note 2 for the details The sweep can also be done by enter Center frequency or Span frequency Press mH J SAM Jor center frequency entry mode Note 3 SOURCE Press MEN for span frequency entry mode Note 3 SWP CF O Press sym fto set the Duty of sweep signal Range 90 10 90 Press MOD ON to initiate sweeping Note 1 Please refer to the setup of LIN and LOG Sweep as the sample below 2 Because all frequency range 0 01Hz 15MHz of GFG 3015 are composed of 8 frequency ranges The details as below So the value of start and stop frequency must be at the same sweep range 150kHz 15MHz 15kHz 1 5MHz 1 5kHz 150kHz 150Hz 15kHz 15Hz 1 5kHz 1 5Hz 150Hz 0 15Hz 15Hz 0 01Hz 1 5Hz Sweep Range 3 The bandwidth SPAN stop frequency start frequency The center frequency stop fre
22. the triangle waveforms is similar to that of generating the square waveforms except that the triangle signal can pass a square wave shaper circuit Comparator circuit between the VCF unit and the output amplifier Regarding the Pulse waveform if the positive and negative duty cycle D A has different value then the square waveform should have unsymmetrical duty that is the positive and negative Pulse waveform GFG 3015 p 63 6 Amplitude and DC offset The Amplifier of GFG 3015 is similar to lineally multiplier EL4451 The amplitude of this amplifier varies with the different control voltage The control voltage comes from the Amplitude of the D A converter The MPU puts a specific value to the D A converter which will generate a corresponding voltage to main output Amplifier from which user will get different output amplitude The procedure of the amplitude setting is similar to that of DC offset setting except that there is another D A converter Offset adjust D A to change the DC offset of output amplifier 7 Modulation Function The GFG 3015 provides two different kinds of modulation functions one is Amplitude modulation and the other is Frequency modulation The instrument has another internal independent function generator which can generate Sine Triangle and Square waveform with the frequency range from 0 01Hz to 10kHz and the symmetry and amplitude of waveform are adjustable The full function generator is used to make the
23. wave and the amplitude must be 1Vpp Set Conditions Sweep Type LIN Start Frequency 150Hz Stop Frequency 15kHz RATE 1kHz Modulation ON The BNC connector will output 1kHz Ramp wave and the amplitude must be 2 5Vp p into 10k O 7 11 5 Check the External Modulation input function Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 100kHz Signal Source Exit Modulation Type FM Modulation ON O Input a 5Vpp 20kHz Sine wave to EXT Modulation Trigger Input BNC Set the oscilloscope to 2V DIV 1us DIV and 50 load to measure the main output The Span of FM modulation must be 15 now The maximum frequency must be 115kHz The minimum frequency must be lt 85kHz p 54 GFG 3015 7 12 Adjusting Trigger Phase 7 12 1 Adjusting the Trigger Phase the trg 0 will be shown on the up side display Parameter display Area A and the 3190 will be shown on the down side display Parameter display Area B The Down side figures are the corresponding Calibration values that can use all numeric keys and use any unit keys to complete the entry mode Besides you can use a Eu and the Rotate Knob to modify the value you need b O Set the oscilloscope to 1V DIV 0 2ms DIV to measure the main output and fine adjusting the vertical scale of the oscilloscope until the amplitude is full of 8 divisions Then input suitable Calibration values to set the trigger phase to O at 4
24. 1997 A1 1998 A2 2001 EN 55011 1998 class A EN 61000 4 2 1995 A1 1998 Current Harmonic Radiated Immunity EN 61000 3 2 2000 EN 61000 4 3 1996 A1 1998 EN 61000 3 3 1995 EN 61000 4 4 1995 II NN EN 61000 4 5 1995 Conducted Susceptibility EN 61000 4 6 1996 ETT EN a NNNM EN 61000 4 8 1993 NETTEN AEN EN 61000 4 11 1994 Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC Safety Requirements IEC EN 61010 1 2001 GFG 3015 p 1 1 Precautions GFG 3015 is specially designed for safety operation It has passed through rigorous tests of inclement environment to ensure its reliability and good condition The following precautions are recommended to insure your safety and keep the best condition of the equipment 1 Safety Terms and Symbols The following terms and symbols may appear in this manual N WARNING This statement identifies conditions or practices that could result in injury or loss of life This statement identifies conditions or practices that could CAUTION 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 olective ATTENTION Double DANGER ean Conductor Gro
25. 5 SWP CF OPress SYM ho set the Duty of modulation signal Range 90 10 90 Press MOPION kio start performing frequency modulation Note 1 As all frequency range 0 01Hz 15MHz of GFG 3015 are composed of 8 frequency ranges The details as below When the main frequency in FM function is set a reasonable Span must be considered For example If set the main frequency at 1 4MHz Range 7 and set Span at 10 the corrected frequency vibration is from 1 26MHz to 1 54MHz and it will be over Range 7 Therefore the FM result is faults now the Span must be reduced in order to get a reasonable result Main Setting Frequenc 1 5001MHz 15 0000MHz 150 01kHz 1 50000MHz 15 001kHz 150 000kHz f 4 150 01Hz 1 50000kHz 15Hz 1 5kHz E 74 Lo cw g 6 NENNEN NEN 15 01Hz 150 00Hz 1 5Hz 150Hz D a 2 1 51Hz 15 00Hz 0 15Hz 15Hz 0 01Hz 1 50Hz 0 01Hz 1 5Hz 2 Please refer to the setup of frequency modulation as the example below 3 When the modulation signal source external is selected the Rate Span Deviation Symmetry and source selection will disable as those functions are workable on internal source mode only 4 It won t make any change on execution and result by taking different step sequence 5 GFG 3015 can output waveform synchronizing with its modulation function In the example of setting up frequency modulation the Modulation output terminal will output the waveform of sine at 1kHz E
26. 50kHz 7 13 12 Amplitude Calibration 2 of Square Calibration Number from 338 362 To calibrate the Amplitude for square wave from 9MHz to 15MHz range You should go through Calibration Number 338 362 in turn and perform the following 3 steps for each number O Set the Calibration Number 9 Set the oscilloscope to 50 load to measure the main output Key in an appropriate Calibration value to set the output to 8 62Vpp 8 78Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 338 250kHz 9MHz 7 13 13 Amplitude Calibration 3 of Square Calibration Number from 363 375 To calibrate the Amplitude for square wave from 12MHz to 15MHz range You should go through Calibration Number 363 375 in turn and perform the following 3 steps for each number O Set the Calibration Number O Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 9 62Vpp 9 78Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 363 250kHz 12MHz Press the Horn key to finish the manual calibration mode and all new Calibration Value will become effective Before the key is pressed none of the modification can be made GFG 3015 p 61 8 The B
27. Am to set AM mode INT EXT Press SHIFT RATE J to select the source from internal signal INT EXT O Press RATE 1 0 0 Hz Vpp Ji sequence SOURCE O Press SHIFT SPAN to select the modulation signal on SINE wave SOURCE Press SPAN 8 0 DEG A sequence SWP CF O Press SYM 5 0 uen Ji sequence Press voro The MOD Output BNC will output 100Hz sine wave In addition you can use P J anc the Rotate Knob to modify the value you need 6 12 Setup of FM Modulation p 26 The FM modulation function offers internal sine square and triangle Ramp signals Besides you can select the modulation signal from external Modulation Trigger Input BNC O Set the main output function by pressing _ FU C button O Set the main output Amplitude by pressing MF button and number keys Set the main output frequency by pressing FRE9 Joutton and number keys FM O Select the modulation mode by pressing SHIFT AM l buttons INT EXT Select the modulation signal source by pressing SHIFT J rare J buttons INT EXT O Press FA ho set up modulation RATE value Range 0 01Hz 10kHz SOURCE To select the modulation signal by pressing S T 9 and ANY buttons GFG 3015 offers sine square and triangle ramp signals for internal modulation GFG 3015 SOURCE To select the Frequency modulation deviation by pressing SPAN J buttons Range 1
28. CALL The Recall button can retrieve the parameters saved in the RAM RECL O Push srr fand __ STOR f button O Key in the group number from 0 to 9 8 Press any button from Pe Dl ts or MN li complete the setting Example of the Setup RECALL To retrieve a parameters from the RAM of group 6 RECL Press i Jana SHOE cst then key in Jana press ww p 20 GFG 3015 6 9 The SHIFT Key and Function Keys The button is used to enable the secondary function of certain function keys with blue printed letters After pressing the S8 T button The SHIFT LED will light up only the buttons with blue printed letters are working To release the secondary function by pressing SHIFT lagain The Secondary Functions DEFAU SHIFT f R22 Return to the default status of GFG 3015 RECL 2 BEI STOR Retrieve the setup parameters from memory i i SHIFT f SYM Display sweep center frequency and get into enter mode SOURCE 4 HS F SPAN change the Modulation source FM SHIFT f AM set Frequency modulation function INT EXT o BE RATE Choose the Modulation type STOP SHIFT f START Display Sweep stop frequency and get into enter mode LOGS o iia Ez LIN S set LOG sweep function INT EXT 9 a GATE Choose the Counter signal source 6 10 Setup of LIN or LOG Sweep GFG 3015 can adopt frequency to sweep its function output for triangle and
29. CF of 100 1 EXT Frequency Control lt SYNC Output lt gt TTL Output lt gt Synchronization GCV Output lt Variable DC Offset Control lt Output Overload Protection lt gt RS232 Interface Standard p 6 GFG 3015 4 Specifications i i Output Waveforms sine Square Triangle Ramp Pulse AM FM Sweep Trigger Gate or Burst Frequency Range 10mHz 15MHz in 8 Frequency Range auto switch 1 5001MHz 15 0000MHz 100Hz 150 01kHz 1 50000MHz 10Hz 15 001kHz 150 000kHz 1Hz Frequency 1 5001kHz 15 0000kHz 0 1Hz Resolution 150 01Hz 1 50000kHz 10mHz 15 01Hz 150 00Hz 10mHz 1 51Hz 15 00Hz 10mHz 0 01Hz 1 50Hz 10mHz Accuracy Output Impedance 509 10 10 00V 0 01V into 50Q 4 amplitude Range ranges Vac peak Vdc lt 5V Amplitude Resolution 10mV 10 00V 0 01V lt 3 5count at 10Hz 1MHz Accuracy lt 10 5count at 1MHz 15MHz Unit Vpp Vrms dBm 5V into 50Q T V k Vdc lt 5V ac pea RR M eee Accuracy lt 3 3count at Amplitude Min Control Range 80 20 80 to 1MHz Duty Resolution 1 Accuracy lt 1 to 1MHz at 50 Duty Impedance 50 O 10 E pence oa INT te Distomica lt 0 5 46dBc From 10Hz 100kHz lt 30dBc To 15MHz Spec applied form 1Vpp to 10Vpp Asymmetry 11 of period 3ns E rr TN Triangle and Ramp Linearity Error lt 1 of full scale output at 100Hz Sync Output GFG 3015 p 7 Sweep Mode Linear or Log SWE
30. EP 150kHz 15MHz 15kHz 1 5MHz 1 5kHz 150kHz 150Hz 15kHz 15Hz 1 5kHz 1 5Hz 150Hz 0 15Hz 15Hz o 0 01Hz 1 5Hz _ Width gt 100 A In Same Frequency Range Rate lo 01 Hz 10kHz Symmetry Control 90 10 90 Resolution 1 Sweep output lo to gt 5Vp p into 10k Q AM FM Sweep Trigger int ext Gate or Burst Implement by Trigger Type _ Sine Square Triangle Ramp or Variable Symmetry Pulse Rate Frequency 10mHz 10KHz in 3 Frequency Range Range auto switch Rate Frequency Ond ese Accuracy oweep Range Types Waveform Rate Frequency 99Hz 1 Hz x Resolution Output Level _ SWoon into 1 kQ load Modulation Sine Wave Distortion 2 from 10Hz to 10kHz Amplitude Modulation 00 oo MOQuIa ton 0 01Hz 10kHZ INT D DC 1 AMHZ EXT trequency Rate Carries 3dB Bandwidth 100Hz to 5MHz preter m Pr TU ran IT eet Frequency Modulation ue Deviation 0 15 uu Modulation Lrequency Rate i External Sensitivity lt 5Vpp for 15 deviation k 0 01Hz A0kHz INT D DC SOKHz EXT p 8 GFG 3015 Start Stop Phase 909 80 0 01Hz 10kHz Trigger Frequency Range 0 1Hz 1MHz Useful to 10MHz Ext Trig Frequency Range Gate or Burst Implement by Trigger setting 100 1 0 to 10V 1V In Same Frequency Range Input Linearity 0 596 to 1MHz lt 5 to 10MHz Input Impedance 10k O 3Vpp gt 10 TTL Load DC to 1MHz
31. Function Generator Model GFG 3015 Operation Manual 82FG 30150MB Table of Contents Page T PIeCcaUlolS uunc cured ee rea DID Fore aaa 2 25 Product INtoOQU CIO pe 5 A Mm nn a AOSE 6 zbelsr Te erjijejj rm 7 5 Front ang Hear Panels noni tae e Ud QN u 6 10 GOODS gel moe Ed 18 6 1 The First Step Setup For Instrument 1 eee eeeeee ere 18 6 2 Ihe Setup of Output FUNCION eie eoa eur e coo suae coo Ene ceo on eno o nace 18 6 3 The Setup Of Frequenocy 1211 eeeeieeee aaa ene s nennen nnne n hannah nana nnn 18 6 4 The Setup of Amplitude Lees iieeee e eeeeee eene enne nnn nnn nnn nhan 19 6 5 TING SCID OF ONSET ai ias 19 0606The Selup Ol DUY inicio taie iio cidos 20 6 7 The Seling OF STORE asi a 20 6 8 The Setting Of REGA LLanes 20 6 9 The SHIFT Key and Function Keys cccccseseessesseeeeseeceeneeseessesseneeseenseseenseeees 21 6 10 Setup of LIN or LOG SWe ep occcoocccccconocccccononccocononncononnnnnonennnncnrnnannnrrnnannnrrnnannnnnos 21 0 11 SETUP OF AM Modular dd 25 0 12 Setup OF FM eer e 26 013 SEDO Tige hair 28 6 14 Setup of GATE and BUR S iia a 30 6 15 Setup of External Coll usina id 32 0 16 THE VGF FURGUOTi uiuit eimi orae secuit reuo ata 34 6 17 THE GCV Output FUlCllOl noies iei ce due e eEE disk usa cdi Erud 35 6 18 THE TTL Signal Output Function
32. Hz 2 0 2V 7 7 Adjusting Rise Fall Time Set Conditions Function Square Wave Amplitude 10Vp p Duty Cycle 50 Frequency 1MHz Modulation OFF O Use an oscilloscope with 50 2 load to measure the main output Then adjust VC940 until the Rise or Fall time is smaller than 18ns The Overshot of square wave must be smaller than 10 of Output amplitude 7 8 Adjusting Main Sine wave Harmonic Distortion Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 1kHz Modulation OFF O Set the Distortion meter Or Audio analyzer to 50 load to measure the main output e Adjust VR420 and VR430 until the minimum distortion harmonic is reached Check the value for full frequency from 10Hz 100kHz that must be smaller than 0 5 46dBc Set Conditions Frequency 15MHz Amplitude 1Vp p Set the spectrum analyzer to 50 Q load adjust the start frequency at OHz and the stop frequency at 100MHz to measure the main output Check the value of full frequency from 100kHz 15MHz that must be smaller than 30dBc 7 9 Adjusting Modulation source 7 9 1 Adjusting Rate and symmetry the CaL will be shown on the display A Parameter display Area A and the RATE will be shown on the display B Parameter display Area B Now the GFG 3015 is in Rate calibration state O Wait about 3 minutes the instrument will be back to original state That means the calibration is completed p 50 GFG 3015
33. Hz Sine signal from Main Output connector Note 1 It won t make any change on execution and result by taking different step sequence 2 If need to change difference frequency variation range in order to get maximum variation more than 100 times at the same range it is to be suggested to set the main frequency on the top of each frequency range 6 17 THE GCV Output Function The GFG 3015 provides the function of Generate control Voltage GCV User can get a voltage from 0 2V to 2V from the instrument and the voltage changes following the different main output frequency setting In other words if change the setting of the main frequency the voltage got from GCV output BNC connector will be changed Basically If user set any main frequency then It will get a relative voltage from instrument But that just appear in same Frequency Range Because whole frequency range 0 01Hz 15MHz of GFG 3015 are composed of 8 frequency range The detail is as below So the GCV output voltage 0 2 to 2V just appear on each same frequency range 150 00Hz 15 01 Hz 270 2V 15 00Hz 1 51Hz 2 0 2V 1 50Hz 0 01Hz 2 0 2V Example of the Setup of GCV To set the following conditions Get 2V from GOV output BNC connector 1 50000kHz 150 01Hz 2 0 2V Procedure You will get about 2V from GCV output BNC connector Also you can get 2V from another frequency ranges with the same procedure as above description by sett
34. If For measurements performed on circuits directly connected to the low voltage installation 9 Place GFG 3015 in a location with a suitable environment as stated above free from dust direct exposition of sunlight and strong effect of magnetic fields 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 i i Earth terminal marked with the letter E or by the earth symbol or This lead appliance must only be y y 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 L
35. NVALID HANDLE VALUE printf s Error_Message 0 return FALSE Timeout CommTimeOuts ReadlntervalTimeout 1 CommTimeOuts ReadTotalTimeoutMultiplier 0 CommTimeOuts ReadTotalTimeoutConstant 1000 CommTimeOuts WriteTotalTimeoutMultiplier 0 CommTimeOuts WriteTotalTimeoutConstant 5000 if TGBetCommTimeouts hComm amp CommTimeOuts printf s Error_Message 1 return FALSE GFG 3015 p 45 p 46 n set baud rate ll ByteSize p parity E ps StopBits Hi Je A e DCB dcb 0 dcb DCBlength sizeof dcb if IGetCommsState hComm amp dcb printf s Error_Message 2 return FALSE dcb BaudRate CBR_9600 current baud rate dcb ByteSize 8 number of bits byte 4 8 dcb Parity 0 0 A no odd even mark space dcb StopBits 0 0 1 2 1 1 5 2 if IGetCommState hComm amp dcb printf 9os Error Message 3 return FALSE Set In Out Queue y if ISetupComm hComm 8196 8196 printf s Error_Message 4 return FALSE if EscapeCommFunction hComm SETDTR printf 9os Error Messagel5 return FALSE return hComm GFG 3015 6 24 The Error message of instrument The operation of GFG 3015 is a whole digitizing operation user interface Every parameter will be showing by numerically and every input value keyed in with numerical keys So when key in the value to instrument it might cause s
36. Output BNC AC CN 24 NC P4 HON EY ri bw isa Y EXT Modulation Trigger Input BNC 25 VCF Input BNC EXT Counter Input BNC These LEDs indicate the current status of trigger function on display and the current operation functions The LED lights on to indicate the trigger setting status of multi trigger type The LED lights on to indicate the trigger setting status of Single trigger type The EXT LED lights on to indicate the external trigger signal source The LED lights on to indicate that the trigger function is enabled The LED light on indicated that the enter mode is Secondary Functions right now The LED lights on to indicate that all modify keys is disabled The LED indicates the current operation status with the RS 232 interface bus This is the BNC connector that outputs all main signals Output resistance is 50Q This is the BNC connector that outputs sync signals Output resistance is 50Q This is the BNC connector that outputs TTL level signals This is the BNC connector that outputs the voltage between 0 2V and 2V varied with different Frequency This is the BNC connector that outputs internal Sweep or modulation signals Output Impedance is 10kQ This is the BNC connector for EXT amplitude frequency modulation or EXT sweep signal input The amplitude modulation index is 100 when lt 10Vpp is input The frequency modulation index is 15 when lt 5Vpp is input The trigger mode input signa
37. ation values will be lost and the default setting will be recalled 7 2 Adjust and Check up the operation DC Voltage O Set the DMM to DCV range to measure the particular test point O Adjust the adjust points and check up the operation DC voltage according to the following table Test Point Adjust Point Correct Voltage Value TP112 CHECK 5V 0 25V TP150 CHECK 5V 0 25V U921 PIN1 CHECK 5V 0 25V p 48 GFG 3015 7 3 Adjusting Main Clock Set Conditions Set to External Counter mode Gate Time 1 second Connect a standard signal of 10 000000MHz to EXT Counter Input BNC connector Adjust VC1021 until the 0 00000 MHz is shown on the display In the meantime The LED will light up O Change the Gate time to 10 second then check the displayed value which must be smaller than 000 050 kHz 7 4 Adjusting Sensitivity of counter Set Conditions Set to External Counter mode Gate Time 0 1 second Connect a standard signal of 100 0000MHz with 50 load to EXT Counter Input BNC connector Adjust VR1000 until 00 0000 is shown on the display Make minimum amplitude level of that 100 0000MHZz signal O Check full range of input frequency from 5Hz to 150MHz that must be smaller than 35mVrms 5bHz 100MHz and 45mVrms 100MHz 150MHZz If found any frequency range over the specification readjust VR1000 until it meets the sensitivity specification and recheck full range of input frequen
38. cy again 7 5 Adjusting VCF Function 100 1 Set Conditions Function Square Wave Amplitude 10Vp p Duty Cycle 50 Frequency 15kHz Modulation OFF O Input a DC 10 1V to VCF BNC connector Set the oscilloscope to 2V DIV 0 5ms DIV and Positive trigger slope to measure the main output Then adjust VR215 until the positive duty cycle is full of 10 divisions O Change the trigger slope of oscilloscope to negative and adjust VR212 until the negative duty cycle is also full of 10 divisions Use the Counter to measure the output Q The frequency of output must be smaller than 150Hz 7 6 Adjusting Main Frequency Duty Cycle and GCV Output Check O The CaL will be shown on the up side display Parameter display Area A and Freq will be shown on the down side display Parameter display Area B Now the GFG 3015 is in Duty calibration states Please wait for few minutes Wait about 12 minutes the instrument will be back to original state Set Conditions Function Square Wave Amplitude 10Vp p Duty Cycle 50 Frequency 15kHz Modulation OFF Set the DMM to DCV range to measure the GCV output terminal Q Check the Voltage of GCV output which must be at 1 8V to 2 2V GFG 3015 p 49 O Check the GCV output voltage 0 2 2V which just appears on the same frequency range The detail is as follows 150 00Hz 15 01Hz 2 0 2V 15 00Hz 1 51Hz 2 0 2V 1 50Hz 0 01Hz 2 0 2V 1 50000kHz 150 01
39. d the output through the Main Out terminal This function includes the internal and external Trigger with the same operation procedure except that the Trigger signal will be obtained from the external Trigger input terminal 10 Frequency Counter GW has designed its own full function counter chip GFC 9701 with high frequency test range for the system The counter has the internal and external counter mode for GFG 3015 The most important function for the internal counter mode is to show the main frequency VCF on the display So we take a square signal from Square shaper and change the level to TTL compatible level by TTL shaper block then the signal will connect with the counter GFC 9701 Because the counter directly connects with the MPU system so the MPU can get the correct frequency and show it on the Display In addition as the MPU can get the correct frequency anytime so it can monitor the output frequency at all the time to keep the accuracy of output frequency This function includes the internal and external counter mode with the same operation procedure except that the external test signal has to pass a preamplifier circuit and change it to TTL compatible level GFG 3015 p 65
40. e all the numeric keys and use any unit keys to complete entry mode Besides you can use 2 gt Rotate Knob to modify the value you need 9 Set the oscilloscope to 2V DIV 0 2mS DIV and 50Q load to measure the main output Input suitable Calibration values to set the span of modulation to 100 then press HOLD fto finish the step and proceed next step ASP 2 GFG 3015 p 51 Now the ASP 2 is shown on the up side display and the 2450 is shown on the down side display Set the oscilloscope to 2V DIV 0 2mS DIV and 50Q load to measure the main output Input suitable Calibration values to set the Amplitude to 10Vpp then press How to finish the step and proceed next step ASP 3 O Now the ASP 3 is shown on the up side display and the 2390 is shown on the down side display Set the oscilloscope to 2V DIV 0 2mS DIV and 50Q load to measure the main output Input suitable Calibration values to set the span of modulation to 100 then press mor to finish the step and proceed next step ASP 4 Now the ASP 4 is shown on the up side display and the 2460 is shown on the down side display Set the oscilloscope to 2V DIV 0 2mS DIV and 50Q load to measure the main output Input suitable Calibration values to set the Amplitude to 10Vpp then press mor to finish the step and proceed next step ASP 5 Now the ASP 5 is shown on the up side display and the 2280 is shown
41. e A Figure B on below and replace a proper fuse as listed below Be sure to use the correct fuse before changing the applying location F101 T 0 8A 250V F100 T 0 5A 250V Check the line voltage setting on the rear panel If the line voltage setting does not match Please change the line voltage setting according to the following steps 1 Remove line cord from AC socket 2 Switch the AC line voltage switch to correct setting with flat blade screwdriver and reinsert Figure A Figure B 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 GFG 3015 p 3 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 CAT II The detail is as Table A Pollution degree 2 Table A CAT IV For measurements performed at the source of the low voltage installation CAT III For measurements performed in the building installation CAT
42. e Amplitude Span the Frequency Rate and the Duty Symmetry of the generator The output of VCF will become FM function waveform and pass the waveform choice the output amplifier the ATT and the output through the Main Out terminal This function includes internal modulation and external modulation with the same operation procedure The only difference with external modulation is that the modulation signal source will come from external MOD input terminal p 64 GFG 3015 8 Sweep Function 1 LIN Sweep The procedure of generating the LIN Sweep functions is similar to that of generating the FM function except that the Ramp waveform is the only signal source 2 LOG Sweep The procedure of generating the LOG Sweep functions is similar to that of generating the LIN Sweep functions except that the signal source will pass a LOG wave shaper circuit This circuit be included MOD function generator block 9 Trigger Function The Trigger Signal Generator will generate special signal that can instruct the VCF unit to generate stop waveform The Signal obtained from the internal independent function generator must go through a TTL level shaper as this block only accepts TTL compatible level So can use the Frequency Rate and the Duty Symmetry of this generator to set the trigger phase and other parameters of Trigger Function The output of VCF is to correct Trigger waveform and pass the waveform choice the output amplifier the ATT an
43. e positive and negative duty cycle D A has different values then the current of charge and discharge will be different Therefore the triangle waveform should have unsymmetrical duty 4 Frequency setting The same status as the VCF above the MPU puts a specific value to the main frequency D A the VCF unit will generate a correspond frequency Symmetrical triangle wave then input a desire frequency value to the instrument the MPU will set the frequency accordingly 5 Description of every kind of Waveform The GFG 3015 provides many kinds of waveforms including Sine Triangle oquare Ramp and Pulse Please refer to the following for details 1 Triangle and Ramp Waveform The same status as the VCF above the output voltage of the VCF unit is a symmetrical triangle wave which can pass the waveform choice the output amplifier the ATT and the output through the Main Output terminal Regarding the Ramp wave if the positive and negative duty cycle D A has different value then the triangle waveform should have unsymmetrical duty that is the positive and negative Ramp waveform 2 Sine Waveform The procedure of generating triangle waveforms is similar to that of generating the sine waveforms except that the triangle signal can pass a sine wave shaper circuit between the VCF unit and the output amplifier and the shaper circuit can change the waveform type from triangle to sine 3 Square and Pulse Waveform The procedure of generating
44. frequency from GFG 3015 Function Generator Besides the GFG 3015 can also generate a high accuracy frequency to provide high frequency resolution Graph1 indicates the fundamental construction of a frequency feedback system Except the different design from the typical circuit GFG 3015 system also has micro controller CPU unit equipping an additional RS 232 interface functions which will be used on any test system with other instrument or to be controlled by computer GFG 3015 p 5 3 Features GFG 3015 is a functional Function generator that applies Frequency feedback control system technique and can generate high frequency accuracy with high resolution Its main signal source can generate waveforms including sine wave square wave triangle wave and ramp wave There are additional features listed as follows lt All digitized operation user interface lt gt Output Waveforms of Sine Square Triangle Ramp Pulse AM FM Sweep Trigger and Gate or Burst lt Wide output frequency range 0 01Hz 15MHz lt High frequency accuracy 0 02 5 count lt gt Maximum frequency resolution 10mHz lt Dual displays indicate frequency and amplitude or other necessary information lt gt Built in 6 digit INT EXT Function Counter and up to 150MHz frequency range with high resolution lt gt INT EXT AM FM Modulation with internal modulation signal output lt LIN LOG Sweep Mode with internal sweep signal output lt V
45. function mode If the key is pressed again the function will stop When the key is pressed the LED In Trigger Function LED area will light up until the key is pressed again The LED will light off i sicu MUT f Key is to choose the type of Trigger Single trigger or multi trigger When the key is pressed the MULT or SINGLI LED In Trigger Function LED area will light up accordingly H PHASE f Key is to set the phase of trigger function entry mode Key in the desired value of percentage by using number keys modify keys and Unit keys When the key is pressed the LED In parameter display area B will be flashing until other mode is set H TRIG EXT J Key is to choose the Trigger signal source internal or external When the key is pressed the EXT LED In Trigger Function LED area will light up accordingly until the key is pressed again The LED will light off INT EXT GATE B Key is to set the Gate time of External counter function The cycle order is according to 0 01s 0 1s 1s and 10s When the key is pressed the Gate time LEDs will light up according user s wish The other function is to choose input signal source of counter internal or external by using Secondary Function mode The 6 digit Parameter display presents the parameter values and information about the current status and unit The LED light on indicated that the value of display was Start frequency of sweep function right now The LED light
46. g the parameters of Sweep or modulation even the Trigger function It creates a friendly operation environment In addition it can read the output frequency through the powerful Counter GFC 9701 and modify the output frequency value at the real time Therefore it also provides high accurate signal p 62 GFG 3015 3 V C F Basically the Voltage Control Frequency unit is to transform voltage into frequency It consists of a main frequency D A a duty cycle D A a positive negative constant current source a diode switch unit a buffer a level detector and an integral capacitor and etc The MPU puts a specific value to the main frequency D A which will generate a corresponding voltage for the reference of the duty cycle D A then two different polar voltages for current source unit will be generated by the duty cycle D A one is a positive voltage from the positive duty cycle D A and the other is a negative voltage from the negative duty cycle D A The current source block will transform two different polar voltages of the duty cycle D A output into two different polar correspond constant current These currents will be charged or discharged by the diode switch unit to the integral capacitor Cr and the voltage of the Cr will become a continuous symmetrical triangle waveform The diode switch movement is controlled by the level detector and the voltage of level detector from the triangle waveform so does the triangle wave oscillator If th
47. gnal Type Synchronize with main output Procedure O Set the main frequency to 10kHz refer to 6 3 The Setup of Frequency Connect with SYNC output BNC connector You will get a 10kHz signal synchronized with main output from the connector 6 20 Remote Control RS232 Interface The GFG3015 contains a DB 9 pin male RS 232 connector for serial communication with a computer or terminal The GFG 3015 s RS 232 interface is configured as an RS 232 Data Terminal Equipment so that data is sent from pin 3 and received on pin 2 For remote controls the RS 232 interface has to be connected with a computer or terminal p 36 GFG 3015 Pin Assignments The Pin assignments of the RS232 connector on the rear panel for DB 9 D The details are listed below No connection Receive Data RxD input Transmit Data TxD output No connection Signal Ground GND No connection No connection No connection No connection OCOnNOOABRWDNDM DB9 to DB9 Wiring The wiring configuration is used for computer with DB9 connectors that configured as Data Terminal Equipment GFG 3015 Computer DB9 DTE DB9 DTE PIN2 PIN2 PIN 3 0X 0 PIN 3 PINS AH PINO Figure 6 20 1 DB9 to DB9 wiring When the GFG 3015 is set up with a RS232 interface please check the following points Do not connect the output line of one DTE device to the output line of the other Many devices require a constant high signal on one or more
48. he output to the specific value listed below so 1008Vpp 9 92Vpp L 8 E 51 508Vpp 492Vpp 52 508Vpp 492Vpp L 7 aan simis S 2 52Vpp 2 48Vpp 172mVpp 168mVpp 2 52Vpp 2 48Vpp 162mVpp 158mVpp ss 1 264V pp 1 256Vpp ss 92mVpp 88mVpp 56 1 256V pp 1 248Vpp 82mVpp 78mVpp 644mVpp 636mVpp 11mVpp 9mVpp 7 13 4 Attenuator Calibration of Square Calibration Number from 66 81 To calibrate the Attenuator for square wave You should go through Calibration Number 66 87 in turn and perform the following 3 steps for each number O Set the Calibration Number 9 Set the oscilloscope to 50Q load to measure the main output 8 Key in an appropriate Calibration value to set the output to the specific value listed below p 58 GFG 3015 Calibration Number The output should be Calibration Number The output should be 66 1008Vpp 9 92Vpp 634mVpp 626mVpp 67 508Vpp 4 92Vpp 5 332mVpp 328mVpp 69 252Vpp 248Vpp L m aramivpp 168mvpp 70 252Vpp 248Vpp T8 _ _s62mvop 188mVpp _ 7m 1264Vpp 1256Vpp 7 1256Vpp 1248Vpp m smWpp mVpe 73 644mVpp 636mVpp 81 timVpp 9mVpp 7 13 5 Amplitude Calibration 1 of Sine Calibration Number from 82 141 To calibrate the Amplitude for sine wave from 250kHz to 15MHz range You should go through Calibration Number 82 141 in turn and perform the following 3 steps for each n
49. ing different frequency value Please refer to the following 1 Press FREO 1 5 e in sequence GFG 3015 p 35 2 You will get about 2V from GCV output BNC connector Note It won t make any change on execution and result by taking different step sequence 6 18 THE TTL Signal Output Function The GFG 3015 provides a compatible TTL level signal from TTL Output BNC connector The frequency of TTL signal output depends on the main output frequency If need to modify the frequency of the signal please refer to the procedure of 6 3 The Setup of Frequency The amplitude of the signal is fixed at 3Vpp which can not be changed Example of the Setup of TTL Output To set the following conditions Main Frequency 5kHz Signal Type TTL Level Procedure O Set the main frequency to 5kHz refer to 6 3 The Setup of Frequency O Connect with TTL output BNC connector You will get a 5kHz TTL Level signal from the connector 6 19 THE SYNC Signal Output Function The GFG 3015 provides a synchronous signal with main output from SYNC Output BNC connector The frequency of SYNC signal output synchronizes with main output If need to modify the frequency of the signal please refer to the procedure of 6 3 The Setup of Frequency The amplitude of the signal is fixed at gt 1Vp p open circuit which can not be changed Example of the Setup of Sync Output To set the following conditions Main Frequency 10kHz Si
50. input pins e Ensure that the signal ground of the equipment is connected to the signal ground of the external device e Ensure that the chassis ground of the equipment is connected to the chassis ground of the external device e Do not use more than 15m of cable to connect devices to a PC Ensure the same configurations are used on the device as the one used on PC terminal Ensure the connector for the both side of cable and the internal connected line are met the demand of the instrument Communication Mode The same baud rate and data format must be set to the instrument and the computer The baud rate of the RS 232 interface can be set as listed in the following table GFG 3015 p 37 300 Baud 600 Baud 1200 Baud 2400 Baud 4800 Baud 9600 Baud 19200 Baud The data transmission format is N 8 1 no parity bit 8 data bits 1 stop bits Computer s Connection A personal computer with a COM port is the essential facility in order to operate the instruction via RS232 interface The connections between GFG 3015 and computer are as follows Connect one end of a RS232 cable to the computer Connect the other end of the cable to the RS232 port on the GFG 3015 Turn on the GFG 3015 Turn on the computer lt The RS232 connection testing If you want to test whether the RS232 connection is working or not you can send a command from computer For instance using a terminal program send the query command uppercase
51. ion signal by pressing SHIFT p SAA J buttons GFG 3015 offers sine square and triangle ramp signals for internal modulation SOURCE Select the amplitude modulation depth by pressing S 4N_ buttons Range 100 SWP CF Press SYM I set the Duty of modulation signal Range 90 10 90 Press MOD ON I start performing amplitude modulation Note 1 Please refer to the setup of amplitude modulation as the example below 2 When the modulation signal sources from external are selected the Rate Span Depth Symmetry and source selection will disable as these functions are operated on internal source mode only 3 It won t make any change on execution and result by taking different step sequence 4 GFG 3015 can output waveform synchronizing with its modulation function In the example of setting up amplitude modulation the Modulation output terminal will output the waveform of sine at 100Hz Example of the Setup of AM Modulation To set the following conditions Main function Sine Wave Main Frequency 10kHz Modulation rate 100Hz 4 Main Output Amplitude 10Vpp 4 4 Modulation Signal Source Sine Modulation Depth 80 Modulation Mode Amplitude Modulation Signal Symmetry 50 Modulation Source INT Procedure O Press FUNC hio select SINE wave for main output GFG 3015 p 25 O Press AMFL I y oum in sequence Then press _ FRE i E KUAN S in sequence FM O Press
52. itude UNIT Set the unit of amplitude lt 1 gt Vpp lt 2 gt Vrms lt 3 gt dBm AMPLitude UNIT Checktheunitofamplitude None DIN aa A None SOURce WAVeform Set the waveform of NR1 lt 1 gt Sinusoid modulation mode lt 2 gt Triangle lt 3 gt Square GFG 3015 p 41 Command Function Parameter Arguments SOURce WAVeform Check the present waveform of modulation mode SOURce STATe Set the modulation function lt NR1 gt lt 0 gt OFF lt 1 gt AM lt 2 gt FM lt 3 gt Sweep can ee MN NN o RE function lt 1 gt External a eee source SOURce MODAM RATe Check the value of AM Rate None SOURce MODAM SPAN Check the value of AM span None_ SOURce MODAM SYM Checkthe value of AM SYM Noe SOURce MODFM RATe Check the value of FM Rate Noe SOURDE MODFMSPAN Check the valle ULM Nue SOURCE MODFM SYM Check the value of FM SYM None None SOURce SWEep STARE Set the value of sweep start lt NRf gt Numeric data frequency SOURce SWEep STARt Check the value of sweep None start frequency frequency mee emm m stop frequency center frequency maania T ndi M oU center frequency SOURce SWEep SPAN Set the value of sweep span SOURce SWEep SPAN Check the value of sweep None span SOURce SWEep RATe Set the value of sweep rate SOURce SWEep RATe Check the value of sweep None rate SOURce SWEep SYM Set the value of s
53. ive 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 p 4 GFG 3015 2 Product Introduction The frequency feedback method applied by GFG 3015 is a new technique that generates stable output frequency with extraordinary accuracy for Function Generator The traditional function generators typically use integrating circuit and constant current circuit techniques that are easily affected by operation temperature or the quality of resistor or capacitor and other key components to occur poor frequency accuracy The innovative design for GFG 3015 is to get rid of these problems The frequency feedback system needs a compatible powerful frequency counter GW has designed his own full function counter chip GFC 9701 for this system with high frequency test range and full functions including Period test Duty test Ratio test Time interval Pulse wide direct display and direct connect with CPU system GFG 3015 uses this Chip to read output frequency value at any time Then CPU will modify the correct value of D A converter immediately according to this value so that the user can get a high accuracy
54. kk include lt stdio h gt include lt windows h gt HANDLE InitCom int Error_ Value char Error_Message 6 Error Create File n Error SetCommtTimeous n Error SetCommState n Error SetupCommi n Error GetCommsState n Error EscapeCommFunction n void main char command line 100 char Receive Data 100 char Read Machine Number 10 IDNAn DWORD dwcommand_len 0 dwWritten 0 dwRead 0 Int i error value 0 HANDLE hComm p 44 GFG 3015 initial Data for i 0 i lt 100 i command_line i 0 for i 0 i lt 100 i Receive _Datali 0 Create Comm_port i hComm InitCom error value dwcommand len sprintf command line IDN WM An is message terminator WriteFile hComm command line dwcommand len amp dwWritten NULL Sleep 1000 delay 1 sec for instrument response ReadFile hComm Receive Data 100 amp dwRead NULL Receive Data strlen Receive Data 0x00 printf nReceive_Data s n Receive_ Data dwcommand len sprintf command_line FREQuency 3 0f n 1000 0 n is message terminator WriteFile hComm command line dwcommand len amp dwWritten NULL CloseHandle hComm Initial RS 232 HANDLE InitCom int Error_Value HANDLE hComm COMMTIMEOUTS CommTimeOuts hComm CreateFile COM1 GENERIC READ GENERIC WRITE 0 NULL OPEN EXISTING NULL NULL if RComm I
55. l is compatible with TTL level This is the BNC connector for VCF signal input The frequency variation width index is 100 1 when 10V 1V is input Input Impedance is 10kQ This is the BNC connector for external counter signal input The Input Impedance is 1MO 150pF GFG 3015 p 15 Rear Panel WARNING TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND NO OPERATOR SERVICEABLE COMPONENTS INSIDE DO NOT REMOVE COVERS REFER SERVICING TO QUALIFIED PERSONNEL AC 115 230Vew 54VA 42W 50 60Hz GFG 3015 p 16 CP Power Entry model This is the AC power input terminal AC input should be within 7 the range of line voltage 15 50 60Hz 2 Line Voltage Selector This switch can choose the current line voltage between 115V E and 230V 3 RS232 connector This is the port of serial RS232 interface The DCE and Baud i rate is among 300 19 2k GFG 3015 p 17 6 Operation 6 1 The First Step Setup For Instrument Ensure that the voltage of main supply is compatible with this instrument The selector on the rear panel states the required AC line voltage Connect the instrument to main supply with the power cord Press the Power Switch all control functions will be shown on the parameter display area O Press SHIFT F RS232 Lon recall the default value of this instrument 6 2 The Setup of Output Function O Press AYUNO Ley to select main o
56. lock Diagram and Description of the System The block diagram of GFG 3015 consists of a micro processor unit MPU a Voltage control Frequency VCF many digital to analog converters D A for corresponding block a square and sine waveform Shaper a modulation function generator a Trigger signal generator a Frequency Counter GFC 9701 an output amplifier an attenuator ATT and etc The principles of generating waveforms and Function are shown as follows GFG 3015 VCE unit I I I l v OFFSET SINEWAVE ADIUST DUTYCYCLE CURRENT ee MAI DIODE BUFFER WAVE FORM EOUE pon a CE AMPLIFIER ATTENUATOR D A dI s D AC SOURCE BEIDE LEVEI SQUARE AM ON AMPLIFIER DETECTOR SHAPER D A COUNTER o AM INPUT FUNCTION TTL OUTPUT da DISPLAY ee INPUT COUNTER TTL SHAPER e UNIT GFC 9701 EXT GCV OUTPUT gsl d O SE zx e lt PREAMP o INT ice MED MOD FUNTION TRIGGER TRIGGER GENERATOR PHASE SIGNAL TIL 10KHz 0 01Hz D A GENERATOR MOD OUTPU a POWER z Fd E z tH Ga Gry e Ww 1 Power Provide many kind of DC power for every block of the instrument including 18V 15V and 5V 2 MPU The Micro Processor Unit is a powerful control center of the instrument that can control many key blocks through D A converter including the Output waveform the Frequency Amplitude the DC offset the Duty and the settin
57. mands The standard which governs the commands setting for the GFG 3015 is allowed a certain amount of flexibility when you enter commands For instance you can abbreviate many commands or combine commands into one message to send to the GFG 3015 This flexibility called friendly listening saves programming time and makes the command setting easier to be remembered and used Command Characters The GFG 3015 is not sensitive to the command characters You can enter commands in either uppercase or lowercase You can precede any command with white space characters You must however use at least one space between the parameter and the command header p 40 GFG 3015 Abbreviating Commands Most commands have both long form and short form The list for each command in this section shows the abbreviations in upper case For instance you can enter the query SOURce TRIGger STATe simply as SOUR TRIG STAT 6 22 The Commands of RS 232 Serial Interface Common commands Command Function Parameter Arguments CLS Clear status command Noe IDN Identification query Noe RCL Recall command Default setting L JE Commands of the io Command X um a S messages FUNCtion WAVeform Set the waveform of main me lt 1 gt Sinusoid frequency lt 2 gt Triangle None of main frequency FREQuency Set the main frequency FREQeency Check the main frequency amplitude amplitude AMPL
58. ncludes the Boolean parameter type NOTE Do not include the lt gt or symbols when entering the actual value for a parameter SOURce SWEep SPACing lt NR1 gt Jae Type Space Command Header with Parameter GFG 3015 p 39 The following Table defines the Boolean and other parameter types for the GFG 3015 Parameter o Eva Type Description p 0 NRI integes 0 118 NR2_ Decimal numbers 1 5 3 141 8 4 NR3 Floating point numbers 4 5E 1 8 25E 1 NRF NR1 NR2 or NR3 1 1 5 4 5E 1 Parameter Types for Syntax Descriptions For the actual value of the parameter type lt Boolean gt you have to enter O instead of OFF or enter 1 instead of ON The following example includes both the header and a value for the parameter type SOURce TRIGger STATe 0 The parameter values which appear in this manual are often separated by a vertical line This vertical line means the word or For example values for the parameter Boolean are 0 1 This means O off or 1 on any single value is a valid parameter y Message Terminator As there is no signal of end message on RS232 bus therefore use LF Line Feed Ox0A or ASCII n as message of terminator When a series of commands are sent to the instrument they must add a LF to be a judgment for message terminator As for query command the return message of the instrument is also added a LF for PC to judge message terminator Entering Com
59. ncy period O Set the Trigger Type to Multi Trigger type O Because the Frequency and Symmetry of Trigger signal have their own accuracy that is different than main frequency therefore when the above formula is used to calculate the Symmetry the value might have to be modified to match the Burst count as desired To set the following conditions for BURST function example Main function Sine Wave Burst period 10ms Main Frequency 1kHz 1mS Burst count 3 Main Output Amplitude 10Vpp Procedure O The calculation of setting 1 Trigger Rate Burst period 10mS 100Hz 2 Symmetry of Trigger signal 100 10mS 3 x 1mS 10MS x100 30 Press FUNC Jio select Sine wave for main output Press AMPL J 1 J 0 J Hz Vpp Jin sequence Then press FREO J 1 J vows J in sequence Press SICEMET Jio set Trigger Type on Multi Trigger Press EIC EXE lio select the source from internal signal 9 8 8 GFG 3015 INT EXT SWP CF Press SYM 3 0 DEG J ii sequence O Press PHASE 0 DEG Jia sequence Press icon The BURST Function will perform on output terminal Please see Figure 3 In addition you can use lt Jana the Rotate Knob to modify the value of Trigger signal Symmetry and set the Burst count you need Note 1 It won t make any change on execution and result by taking different step sequence 2 Use suitable external signal to set the BURST function you need
60. o set Trigger Type on Multi Trigger Press Sie tat l to select the source from internal signal INT EXT Press RATE J 1 z Jia sequence SWP CF Press SYM 5 0 DEG Jin sequence Press PHASE 3 0 DEG Jin sequence Press ERIS J The Trigger Function will perform on output terminal Please see Figure 1 Besides you can Use gt and the Rotate Knob to modify the value you need o 9 eo o Y Another Example of the Setup of Trigger Function All the setting conditions are the same as above mentioned examples except the one set Single trigger of the Trigger Type rigger type Single Trigger Procedure O Press 7777 hio set Trigger Type to Single Trigger The Trigger Function will perform on output terminal Please see Figure 2 GFG 3015 p 29 Figure 1 Figure 2 6 14 Setup of GATE and BURST The GFG 3015 provides GATE or BURST function performed with different Trigger settings If want to set to GATE or BURST function just proceed some simple calculation and some Trigger setting Please refer the setup of GATE or BURST function as the example below Example of the Setup of BURST p 30 O The detailed calculated formula for BURST as below 1 Trigger Rate period Burst period 2 Symmetry of Trigger signal 100 Burst period Burst count x Main Frequency period Burst period x100 O The Burst period gt Burst Count x Main Freque
61. oeanessoas 50 7 9 1 Adjusting Rate and symmetry 1 eeeeeeeeeeieeeee iere enne nennen nnn nnn 50 7 9 2 Adjusting Sine wave Harmonic Distortion eese sss 51 7 10 Adjusting AM modulallOn 5 1 0 citadas 51 7 11 Adjusting FM and Sweep Function ee ee eeeeee eer reeee enne 53 7 12 Adjusting Trigger PHASE ui aa 55 7 13 Calibrating by Software 11 1 11leeee ee LLee eei Lreecclieeee eese nena nana a raa aane 56 8 The Block Diagram and Description of the System 62 EC Declaration of Conformity We GOOD WILL INSTRUMENT CO LTD No 7 1 Jhongsing Rd Tucheng City Taipei County 236 Taiwan GOOD WILL INSTRUMENT SUZHOU CO LTD No 69 Lushan Road Suzhou New District Jiangsu China declares that the below mentioned product GFG 3015 is herewith confirmed to comply with the requirements 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 Equipment Directive 73 23 EEC 93 68 EEC For the evaluation regarding the Electromagnetic Compatibility and Low Voltage Equipment Directive the following standards were applied EMC EN 61326 1 Electrical equipment for measurement control and laboratory use EMC requirements
62. ome mistake now the GFG 3015 will show a corresponding error code on the Display a few seconds later for User to correct the data Please refer to the specification or Operation ways The detailed explanation is as following table Emo Modrate overresouton SSS En Mod symoverrange SSS OS E20 GFG 3015 p 47 7 Adjustment and Correction 7 1 Preparation The essential equipment listed as follows instrument Critical Specification Oscilloscope Over 100MHz Bandwidth Over 200MHz Test Frequency Range The Counter Frequency Resolution must cover GFG 3015 AC DC Voltmeter 4 1 2 Digit DC accuracy istortion Meter or Audio Analyzer Over 10Hz to 100kHz Test Range DC power supply Over 20V 0 5A Supply Over 150MHz Output Frequency Range RF Signal Generator The Frequency Accuracy must cover GFG 3015 Lower 5 Hz Output Frequency Range The o Frequency Accuracy must cover GFG 3015 RE Spectrum Analvzer Over 100MHz Bandwidth P y Amplitude 0 5dB 50 Q Terminator 50 Q 0 2 1W The warm up time of the instrument should be more than 30 minutes The operation temperature should be at 23 5 C and the humidity should be lower than PH80 O Calling System Default Calibration Data The detail as following all the LEDs Except GATE and OVER will light up then press smrr key again all calibration values will be cleared So don t make a rash decision to do it After proceed the step all calibr
63. on Output Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 100kHz Modulation Source Sine Modulation Type AM SYM 50 RATE 1kHz Span 100 Modulation ON Set the oscilloscope to 1V DIV 0 5ms DIV to measure the MOD Output BNC The BNC connector will output 1kHz sine wave and the amplitude must be 1Vpp 7 10 5 Check the External Modulation input function Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 5MHz Signal Source Exit Modulation Type AM Modulation ON O Input a 10Vpp 100kHz Sine wave to EXT Modulation Trigger Input BNC Set the oscilloscope to 2V DIV 2us DIV and 50Q load to measure the main output The Span of AM modulation must be 100 now Input another signal from 10Vpp 10Hz to 1MHz Sine wave to EXT Modulation Trigger Input BNC and check the Span which must be 100 7 11 Adjusting FM and Sweep Function 7 11 1 Adjusting the Span of FM the CaL will be shown on the display A Parameter display Area A and the FSP will be shown on the display B Parameter display Area B Now the GFG 3015 is in calibration state O Wait about 5 minutes the instrument will be back to original state That means the calibration is completed Set Conditions Function Sine Wave Amplitude 10Vp p Duty Cycle 50 Frequency 100kHz Signal Source Sine Modulation Type FM Span 15 Modulation
64. put function Triangle Wave Start frequency 10kHz Output amplitude 10Vpp Stop frequency 100kHz Sweep mode LOG Sweep signal symmetry 90 Speed 0 1 second Procedure o Press FUNS select TRIANGLE wave for main output Press S BANDE Jin sequence LOGS Then press SHIFT LIN to select LOG sweep mode INT EXT Press RATE 1 0 Hz Vpp Jin sequence STOP Press START f l 0 KHz Vrms in sequence STOP Press SHIFT START f 1 0 f 0 j KHz Vrms Jin sequence SWP CF Press SYM i 2 J veom Jin sequence GFG 3015 p 23 Press mopon l The Modulation Sweep Output BNC will output the 10Hz LOG wave In addition you can use lt di and the Rotate Knob to modify the value you need Error message for Sweep Function p 24 Because all frequency range 0 01Hz 15MHz of GFG 3015 are composed of 8 frequency ranges So the Sweep function has specific restriction on the start and stop frequency If the value of start and stop frequency not at the same sweep range then the instrument will show the message to user Basically The message is a suggestion that remind user of selecting a proper sweep frequency range and amend the start or stop frequency Please refer to the sample below To set the following conditions Start frequency 100Hz Stop frequency 1MHz Procedure LOG S O Press NS ho select linear sweep mode
65. quency start frequency 2 The start frequency center frequency of the sweep bandwidth 2 The stop frequency center frequency of the sweep bandwidth 2 The start and stop frequencies can be freely set according to the users preference 4 It won t make any change on execution and result by taking different step sequence 5 GFG 3015 can output waveform synchronizing with its sweep function In the example of setting up LIN sweep the Modulation output terminal will output the waveform of triangle at 1Hz Example of the Setup of LIN Sweep To set the following conditions Output function Sine Wave Start frequency 1kHz Output Amplitude 10Vpp Stop frequency 10kHz Sweep mode LIN Sweep signal symmetry 5096 Speed 1 second p 22 GFG 3015 Procedure o e Press _ FUNC to select SINE wave for main output Press MA l 9 Bovey Jin sequence LOG S Then press HNS le select linear sweep mode INT EXT Press RATE 1 Hz Vpp hn sequence STOP Press START 1 GEN eu jin sequence STOP Press SHIFT START 1 0 Anan in sequence SWP CF Press SYM 5 0 J veer Jin sequence O Press Mop The Modulation Sweep Output BNC will output 1Hz Triangle wave In addition you can use 4 Jang the Rotate Knob to modify the value you need Example of the Setup of LOG Sweep To set the following conditions Out
66. s for each number O Set the Calibration Number Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 9 62Vpp 9 78Vpp GFG 3015 p 59 The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 167 250kHz 12MHz 7 13 8 Amplitude Calibration 1 of Triangle Calibration Number from 180 239 To calibrate the Amplitude for triangle wave from 250kHz to 15MHz range You should go through Calibration Number 180 239 in turn and perform the following 3 steps for each number O Set the Calibration Number O Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 6 44Vpp 6 56Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 180 250kHz 250kHz 7 13 9 Amplitude Calibration 2 of Triangle Calibration Number from 240 264 To calibrate the Amplitude for triangle wave from 9MHz to 15MHz range You should go through Calibration Number 240 264 in turn and perform the following 3 steps for each number O Set the Calibration Number O Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 8 62Vpp 8
67. se rotational knob to change the Baud rate The cycle order is in 300 600 1200 2400 4800 9600 and 19200 sequence If set the instrument to default state must use Secondary Function mode SHIFT J Key is to set the Secondary Functions mode When the key is pressed the instrument will choose Secondary Function and the SHIFT LED will light up For example press SHIFT can recall the default value of the instrument DEG MHz dB KHz Vrms Hz Vpp m Normal mode these keys are used to assign the unit and to set the entered value For example you can use dBm and Vpp to set the output amplitude They can be used to set frequency MHz kHz Hz OFFSET and PHASE etc In STOR or RECL modes they are used as Enter 6 Entry keys 7 Modify keys 8 Trigger Function keys 9 Counter Function key 10 Parameter display Area A 0 To and jos are used to input value A unit key should be pressed to set the entered value JBKSP f key is blank space that used to delete the entered value entirely and the other function is minus key gt E keys are used to change the digit of input d lt D C D User can use the Rotate knob for increasing or decreasing that Q O HOLD fKey to terminate the function of all Modify keys until user press this key again When the key is pressed the LED will light up until the key is pressed again H TRIG ON Key is to start performing Trigger
68. source for modulation even trigger function The detailed principles of modulation is as follows 1 Amplitude Modulation The AM function block is for general purpose of the Amplitude modulation circuit MC1496 including a carrier signal input an audio signal input and a modulation output The output amplitude of carrier signal is decided by the audio signal The carrier signal is obtained from the main waveform can select Sine Triangle and Square and the audio signal is obtained from a internal independent of function generator Set all the parameters of Amplitude modulation by selecting the Waveform modulation source the Amplitude Span the Frequency Rate and the Duty Symmetry of the generator The output of AM function block is to correct AM waveform and pass the output amplifier the ATT and the output through the Main Output terminal The function includes the internal modulation and the external modulation with the same operation procedure except that the modulation signal source is obtained from the external MOD input terminal 2 Frequency Modulation The principles of the VCF have been described previously the voltage varies with the different frequency and the signal obtained from the internal independent function generator is put to the main frequency D A then the frequency of the VCF will be according to this signal Set all the parameters of the Frequency modulation by selecting the Waveform modulation source th
69. ted that the value of display was phase of trigger function right now The LED light on indicated that the value of display was save group number right now The LED light on indicated that the value of display was reload group number right now The V rms kHz Hz 96 and LED light on indicated that unit according current value of display These LEDs indicate the figure of main output waveform and the current operation functions These LEDs indicate the GATE TIME of external counter and the current value These LEDs indicate the current status of Sweep and Modulation and the current operation functions The LED lights on to indicate the setting status of amplitude modulation function The LED lights on to indicate the setting status of frequency modulation function The LIN LED lights on to indicate the setting status of liner sweep function The LOG LED lights on to indicate the setting status of LOG sweep function The Sine and LED light on indicated that according Modulation source waveform The EXT LED lights on to indicate the external sweep or modulation signal source The LED lights on to indicate that the sweep or modulation function is enabled DE N 15 Ne uf 2 QUEE NC 17 A fo a Ny N X Pes 20 Nac Trigger Function LEDs 16 Shift mode LED Hold mode LED 18 RS 232 Interface LED Main Output BNC Sync Output BNC TTL Output BNC GCV Output BNC Modulation Sweep
70. the Calibration Number mode ii Press SHIFT I key once the LED will be lighted up now the instrument is set to the Calibration Value mode Press SF key again the setting is shifted to calibration number mode and the FREQ LED will be lighted up again 1 Press ji PE i keys to set to the OFFSET Calibration mode and the Calibration Value is 560 Press _ SHIFT his once and LED will light up Just input the desired figures ii Press BOP key to finished the manual calibration mode All new Calibration Value will become effective After press this key p 56 GFG 3015 The table below lists the corresponding Calibration Numbers to Calibration items The procedure of manual calibrating with software is as follows 7 13 1 DC OFFSET Calibration Calibration Number from 1 33 To calibrate the DC OFFSET You should go through Calibration Number 1 33 in turn and perform the following 3 steps for each number O Set the Calibration Number Set the DMM to DCV range and 50 Q load to measure the main output 8 Key in an appropriate Calibration value to set the output to the specific value listed below Calibration Number The output should be Calibration Number The output should be 0 0 5mV 4 99V 5mV 4 99V 5m 19 25V 5mv 5mV 19 8 mv 20 249V 5mV 1 25 V 1 24V 5mV 23 0 62 V 0 15V s 0 5mV H Tone I I lt I I gt O Q2 lt lt H gl 3 lt lt
71. umber O Set the Calibration Number Set the oscilloscope to 50 Q load to measure the main output Key in an appropriate Calibration value to set the output to 6 44Vpp 6 56Vpp Because each frequency has different frequency response of its own Therefore we must calibrate the amplitude for every frequency In this calibration step every 250kHz from 250kHz to 15MHz range have a Calibration point Number For example The test frequency of Calibration Number 83 is at 500kHz the other test Frequency of Calibration Number is X then X Calibration Number 82 250kHz 250kHz 7 13 6 Amplitude Calibration 2 of Sine Calibration Number from 142 166 To calibrate the Amplitude for sine wave from 9MHz to 15MHz range You should go through Calibration Number 142 166 in turn and perform the following 3 steps for each number O Set the Calibration Number 9 Set the oscilloscope to 50Q load to measure the main output Key in an appropriate Calibration value to set the output to 8 62Vpp 8 78Vpp The same reason described as 7 13 5 so the formula for Test frequency as below The test Frequency of Calibration Number is X then X Calibration Number 142 250kHz 9MHz 7 13 7 Amplitude Calibration 3 of Sine Calibration Number from 167 179 To calibrate the Amplitude for sine wave from 12MHz to 15MHz range You should go through Calibration Number 167 179 in turn and perform the following 3 step
72. und 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 this instrument all the procedures of disassembling adjusting and maintenance should be performed by a professional technician If the instrument has to be opened or adjusted under some unavoidable conditions and to be managed by a technician who is familiar with GFG 3015 Once there is any abnormality please contact our company or our distributor near you 4 Power Supply AC input should be within the range of line voltage 15 50 60Hz To prevent the instrument from burning up be sure to check the line voltage before turning on power p 2 GFG 3015 5 Grounding To avoid electrical shock the power cord protective grounding WARNING conductor must be connected to ground GFG 3015 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 by qualified personnel Disconnect the power cord before replacing fuse The fuse blows only when there is any wrong on the instrument which will stop working under this situation Please find out the cause then open the outside case Please see the Figur
73. ut a 1KHz TTL level signal to EXT Modulation Trigger Input BNC Set the oscilloscope to 2V DIV 0 2ms DIV and 50Q load to measure the main output O The main output is the same as Figure 1 now refer to 6 13 Setup of Trigger GFG 3015 p 55 7 13 Calibrating by Software Manual Calibration Basic Steps introduction to set to the manual calibration mode The 001 will be shown on the Parameter display Area A and the 2000 will be shown on the Parameter display Area B The figures on the up side display Parameter display Area A represent the Calibration Number and the down side display Parameter display Area B figures are the corresponding Calibration Value o Press EM key to select the setting mode between Calibration Number and Calibration Value alternately When LED is lighted up you can input or modify the Calibration Number as you wish When LED is lighted up you can input or modify the Calibration Value as you wish O Key in the desired value by using all numeric keys and any unit keys to complete the entry mode Besides you can use gt and the Rotate Knob to modify the value you need Press HOLD key to finish the manual calibration mode and all new Calibration Value will become effective Example i When the 001 is shown on the up side display the 2020 is shown on the down side display and the FREQ LED is lighted up that means the instrument is in
74. utput waveform The Waveform will change when you press this key each time The cycle order is according to Sine Triangle Square When the key is pressed the waveform LEDs will light up according to the mentioned cycle order of output waveform O Set different duty cycle ratio not 50 for Triangle or Square waveform to get Ramp or different Pulse width square waveform 6 3 The Setup of Frequency O Set to Frequency Entry mode by pressing FRE9 f button the LED In parameter display area A will be flashing O Key in the desired value of frequency Select a proper unit button to specify the value In addition you can use and the Rotate Knob to adjust the main frequency value you need Note The frequency range of this instrument is from 10mHz to 15MHz in 8 Frequency Range The details and resolution is as below But those ranges will auto switch according to the enter value Frequency Range 10mHz 15MHz in 8 Frequency Range auto switch 1 5001MHz 15 0000MHZz 100Hz 150 01kHz 1 50000MHz 10Hz 15 001kHz 150 000kHz 1Hz Frequency 1 5001kHz 15 0000kHz 0 1Hz Resolution 150 01Hz 1 50000kHz 10mHz 15 01Hz 150 00Hz 10mHz 1 51Hz 15 00Hz 10mHz 0 01Hz 1 50Hz 10mHz Example of the Setup Frequency 1 To set frequency at 250Hz Press FREO first then key in 2 5 0 and press Hz Vop p 18 GFG 3015 2 To modify the frequency to 850Hz Press lt 4 Jor gt
75. weep SYM SOURce SWEep SYM Check the value of sweep None SYM p 42 GFG 3015 Command Function Parameter Arguments lt 1 gt LOG sweep rate ia ane e rate lt O gt OFF SOURce TRIGger STATe Check the trigger state None phase A un NN aw NN phase lt 1 gt Mutiple SOURce TRIGger MODe Check the trigger mode None SOURce TRIGger SOURce Set the trigger source lt NR1 gt lt 0 gt Internal lt 1 gt External SOURce TRIGger SOURce Check the trigger source SOURce TRIGger SYM Set the value of trigger lt NR1 gt Numeric data SYM SOURce TRIGger SYM Check the value of 9 SYM SOURce COUNter GATe Set the gate time of lt 0 gt 001sec counter ee uem a counter 1 External GFG 3015 p 43 Error Messages e Command Error Error Code SCPI Error Code Explanation 100 Command error e Execution Error Error Code SCPI Error Code Explanation Parameter error 221 Settings conflict Data out of range 6 23 The Examples of the Communication Interface Software r kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Microsoft Visual C 6 0 for RS 232 This programming example shows how to communicate PC and instrument via RS232 IDNAn Ask the Manufacturer model number and firmware tFREQuency 1000 0 Set Frequency 1000Hz kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk
76. xample of the Setup of FM Modulation To set the following conditions Main function Sine Wave Main Frequency 100kHz Modulation rate 1kHz 4 Main Output Amplitude 10Vpp 4 4 Modulation Signal Source Sine Modulation Deviation 10 Modulation Mode Frequency Modulation Signal Symmetry 50 Modulation Source INT Procedure O Press FUNC hio select SINE wave for main output GFG 3015 p 27 O Press AMFL i Hom in sequence Then press FRE i 2 Eum in sequence FM O Press SHIFT J AM j to set FM mode INT EXT O Press SHIFT RATE to select the source from internal signal INT EXT Q Press RATE l SY nae Jin sequence SOURCE O Press SHIFT SPAN to select the modulation signal on SINE wave SOURCE O Press SPAN 1 0 DEG in sequence SWP CF Press sym 5 o DEG in sequence Press MOP ON J The MOD Output BNC will output the 1kHz sine wave In addition you can use lt s and the Rotate Knob to modify the value you need 6 13 Setup of Trigger p 28 The Trigger function offers internal trigger source signals Besides You can select the signal from external From Modulation Trigger Input BNC O Set the main output function by pressing FUNC button O Set the main output Amplitude by pressing AMPL button and number keys Set the main output frequency by pressing FREO button and number keys
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