Function Generator
Contents
1. Error Code Explanation E01 Frequency over range E02 Frequency over Resolution E03 Amplitude over range E04 Amplitude over resolution E05 Offset over range E06 Offset over resolution E07 Duty over range E08 Duty over resolution E09 Mod rate over range E10 Mod rate over resolution E11 Mod sym over range E12 Mod sym over resolution E13 Sweep freq over range E14 Sweep freq over resolution E15 AM span over range E16 AM span over resolution E17 FM span over range E18 FM span over resolution E19 Trigger phase over range E20 Trigger phase resolution E21 Store setting over settng numbers range E22 Recall setting over settng numbers range E23 Recall set is no data GFG 3015 p 47 7 The Block 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 unit V OFFSET SINEWAVE ADIUST SHAPER D A 4 DIODE BUFFER WAVE FORM 99 SWIICH AMPLIFER CHOICE LEVEL DETECTOR PREAMP SYC OUTPUT COUNTER INPUT MOD OUTPU FREQUENEY2. 15 Trigger Function LEDs 16 Shift mode LED 17 Hold mode LED 18 RS 232 Interface LED 19 Main Output BNC 20 Syne Output BNC 21 TTL Output BNC 22 GCV Output BNC 23 Modulation Sweep Output BNC 24 EXT Modulation Trigger Input BNC 25 VCF Input BNC 26 EXT Counter Input BNC These LEDs indicate the current status of trigger function on display and the current operation functions The MULT LED lights on to indicate the trigger setting status of multi trigger type The SINGL LED lights on to indicate the trigger setting status of Single trigger type The LED lights on to indicate the external trigger signal source The ON OFF LED lights on to indicate that the trigger function is enabled The SHIFT LED light on indicated that the enter mode is Secondary Functions right now The HOLDI LED lights on to indicate that all modify keys is disabled The 85232 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 1
3. 0 0 23 C 5 C after 30 minutes The maximum resolution is 100nHz for 1Hz and 1Hz for 100MHz 35mVrms 5Hz 100MHz 45mVrms 100MHz 150MHz on Manual x 1 Power cord x 1 50 60Hz 290 W x 142 H x 346 D mm GFG 3015 0 9 5 Front and Rear Panels Front Panel cs Owo HAW o e 09 OOM Hte e CI OW p 10 GFG 3015 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 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 J 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 FREQ LED on parameter display area A will be flashing until other mode is set i d AMPL J 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 AMPL LED on parameter display area B will be flashing until other mode is set OFFSET J key is to set main output offset v
4. GFG 3015 p 23 Press MOPON The Modulation Sweep Output BNC will output the 10Hz LOG wave In addition you can use gt and the Rotate Knob to modify the value you need Error message for Sweep Function 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 LOGS Press mms I select linear sweep mode STOP STOP Press SHIFT START 1 2 Ji sequence Press MODON J When the monon 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 require
5. gt J and 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 Set the main output function by pressing XC Jbutton Set the main output Amplitude by pressing MPE Joutton and number keys Set the main output frequency by pressing FRE Joutton and number keys FM Select the modulation mode by pressing SHIFT J AM buttons INT EXT Select the modulation signal source by pressing SHIFT J RATE buttons INT EXT Press BATE lo set up modulation RATE value Range 0 01Hz 10kHz SOURCE select the modulation signal by pressing SHIFT AN buttons GFG 3015 offers sine square and triangle ramp signals for internal modulation GFG 3015 SOURCE To select the Frequency modulation deviation by pressing S 4N J buttons Range 15 SWP CF Press SYM set the Duty of modulation signal Range 90 10 90 O Press MOP ON 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 fr
6. 2 Line Voltage Selector This switch can choose the current line voltage between 115V 8 230V 3 38232 connector This is the port of serial 5232 interface The DCE and Baud rate is among 300 19 2k GFG 3015 p 17 6 Operation 6 1 The First Step Setup For Instrument 0 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 Press SHIFT I 65232 m recall the default value of this instrument 6 2 The Setup of Output Function Press FUNC to select main output 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 Set different duty cycle ratio not 50 for Triangle or Square waveform to get tRamp or different Pulse width square waveform 6 3 The Setup of Frequency Set to Frequency Entry mode by pressing F820 Jbutton the FREQ LED In parameter display area A will be flashing Key in the desired value of frequency 6 Select a proper unit button to specify the value In addition can use E Jana the Rotate Knob to adjust the main frequency va
7. 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 x 10Vpp 6 5 The Setup of Offset Set to main DC offset Voltage entry mode by pressing 9FFsET now the OFFS LED In parameter display area B will be flashing Key in the desired value of DC offset voltage 6 Select a proper unit button to specify the value In addition you can lt E 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 OFFSET then key in 1 Jana press 2 To modify offset voltage to 2 Vpp 4 Jor gt 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 lt 10Vpp GFG 3015 p 19 6 6 The Setup of Duty Set Duty cycle of Main output entry mode by pressing PUTY Jbutton the DUTY LED In parameter display area B will be flashing Key in the desired value of Duty cycle Key in the specific value by using Unit button In addition you can use gt and the Rotate Knob to modify the Duty cycle of Main output value you ne
8. INT EXT Press SHIFT J RATE Jio select the source from internal signal INT EXT Press _RATE 1 Jin sequence SOURCE Press SHIFT J SPAN Jio select the modulation signal on SINE wave SOURCE Press SPAN 1 J 0 oso in sequence SWP CF Press sym 5 DEG Jin sequence Press MOD oN J The MOD Output BNC will output the 1kHz sine wave In addition you can use lt E Jana 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 Set the main output function by pressing FUN Jj button Set the main output Amplitude by pressing button and number keys 6 Set the main output frequency by pressing omo button and number keys Select the Trigger type by pressing 5 evvvr j button Select the Trigger signal source by pressing e xr button INT EXT Q Press RATE Jio set up Trigger signal RATE value Range 0 01Hz 10kHz SWP CF Press 5 Ji 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 O Press TRIG ON jio start performing Trigger function GFG 3015 Note 1 Please refer to the setup of Trigger function as the e
9. RS232 Interface Standard p 6 GFG 3015 4 Specifications Output Waveforms Frequency Range Frequency Resolution Frequency Accuracy Sine Square Triangle Ramp Pulse AM FM Sweep Trigger Gate or Burst 10mHz 15MHz in 8 Frequency Range auto switch 1 5001MHz 15 0000MHz 100Hz 150 01kHz 1 50000MHz 10Hz 15 001kHz 150 000kHz 1Hz 1 5001kHz 15 0000kHz 0 1Hz 150 01Hz 1 50000kHz 10mHz 15 01Hz 150 00Hz 10mHz 1 51Hz 15 00Hz 10mHz 0 01Hz 1 50Hz 10mHz 0 02 5 Count Output Impedance Amplitude DC Offset Duty Sync Output Sine Square Triangle and Ramp 500 10 10 00V 0 01V into 500 4 amplitude Range ranges eel Mae peak T MOG S OM _ _ Repeller FOO CONES ON lt 3 5count at 10Hz 1MHz Accuracy Unit Vpp Vrms dBm 5V into 50Q Range Resolution 10mV Accuracy lt 3 3count at Amplitude Min Ponte 19098 lt Ego OR 1 COEUR SUE 1 a Level gt 1Vp p open circuit lt 0 5 46dBc From 10Hz 100kHz Distortion 308Bc To 15MHz Spec applied form 1Vpp to 10Vpp Asymmetry 1 of period 3ns Rise or Fall Time Linearity Error 18nSec lt 1 of full scale output at 100Hz GFG 3015 7 Sweep Mode Linear or Log sweep 150kHz 15MHz 15kHz 1 5MHz 1 5kHz 150kHz 150Hz 15kHz 15Hz 1 5kHz 1 5Hz 150H
10. button The SHIFT LED will light up only the buttons with blue printed letters are working To release the secondary function by pressing _ SHIFT The Secondary Functions DEFAU SHIFT 5232 Return to the default status of GFG 3015 RECL 2 90 Retrieve the setup parameters from memory SWP CF 10 SHIFT sym J Display sweep center frequency and get into enter mode SOURCE SPAN Change the Modulation source FM AM J Set Frequency modulation function INT EXT 6 f RATE jJ Choose the Modulation type SHIFT 288 STOP START Display Sweep stop frequency and get into enter mode SHIFT LOG S ERES us sei LOG sweep function I INT EXT BE 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 ramp waves The type of sweep can be set as linear or log sweep co Select a main waveform by using FUNC J button Select a main output amplitude by using Amer J button LOG S Select the sweep mode by using uws J button INT EXT Press RATE to set up sweep RATE value Range from 0 01Hz to 10kHz GFG 3015 p 21 STOP Set the starting frequency by pressing START button and terminate sweep STOP frequency by pressing SHIFT J START The start and stop frequency must be at the same sweep f
11. 10mS 100Hz 2 Symmetry of Trigger signal 210096 10mS 3 x 1mS 10mS x10095 30 Press FUNC Jio select Sine wave for main output Press AMPL J 1 J II Hz V Jin sequence Then press FREO 1 J mos in sequence Press 0 Jio set Trigger Type on Multi Trigger Press meet Jio select the source from internal signal 0 p 30 GFG 3015 INT EXT SWP CF Press SYM 3 DEG Jin sequence Press PHASE DEG sequence Press TRIGON The BURST Function will perform on output terminal Please see Figure 3 In addition you can use gt Jand 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 Example of the Setup of GATE 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 The Gate period gt Open Gate time Set the Trigger Type to Multi Trigger type 9 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
12. CommTimeOuts WriteT otalTimeoutConstant 5000 if SetCommTimeouts hComm amp CommTimeOuts printf 95s Error Message 1 return FALSE GFG 3015 p 45 p 46 he set baud rate ie ByteSize parity i StopBits PE AE AND EEUU J DCB dcb 0 dcb DCBlength sizeof dcb if GetCommState hComm amp dcb printf 95s 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 4 no odd even mark space dcb StopBits 0 0 1 2 1 1 5 2 if IBetCcommState hComm amp dcb printf 95s Error Message 3 return FALSE EE Set In Out Queue if SetupComm hComm 8196 8196 printf s Error_Message 4 return FALSE if EscapeCommFunction hComm SETDTR printf s Error_Message 5 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 some 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
13. PIN 3 Ham VEN PIN 3 PINS PINS 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 e Many devices require a constant high signal on or more input pins Ensure that the signal ground of the equipment is connected to the signal ground of the external device Ensure that the chassis ground of the equipment is connected to the chassis ground of the external device 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
14. 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 includes 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 Space Command Header with Parameter GFG 3015 p 39 The following Table defines the Boolean and other parameter types for the GFG 3015 oo Description Example Boolean Boolean numbers or values 1 0 NR1 Integers 0 1 18 NR2 Decimal numbers 1 5 3 141 8 4 NR3 Floating point numbers 4 5E 1 8 25E 1 NR1 NR2 NR3 1 1 5 4 5E 1 Parameter Types for Syntax Descriptions For the actual value of the parameter type Boolean you have to enter 0 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 01 This means 0 off or 1 on any single value is a valid parameter Message Terminato
15. 0 01 Sec 1 0000 kHz 100mHz 0 1 Sec 1 00000 kHz 10mHz 1 Sec 1 00000 kHz 10mHz 10 Sec 000 000 Hz OVER 1mHz 0 01 Sec 1 0000 MHz 100Hz 0 1 Sec 1 00000 MHz 10Hz 1 Sec 1 00000 MHz 10Hz 10 Sec 000 000 kHz 1Hz 0 01 Sec 10 0000 MHz 100Hz 0 1 Sec 0 00000 MHz OVER 10Hz 1 Sec 0 00000 MHz OVER 10Hz 10 Sec 000 000 kHz 1Hz 0 01 Sec 100 000 MHz 1kHz 0 1 Sec 00 0000 MHz OVER 100Hz 1 Sec 0 00000 MHz OVER 10Hz 10 Sec 000 000 kHz 1Hz 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 Press SHET GATE I select External source for Counter mode Connect the testing signal with Counter Input BNC connector INT EXT Press GATE hio 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 0 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 0 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 freq
16. GFG 3015 1 Press 1 5 lem 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 10kHz 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 Setting Frequency Range 15 0000MHz 1 5001MHz 1 50000MHz 150 01kHz 150 000kHz 15 001kHz 15 0000kHz 1 5001kHz 1 50000kHz 150 01Hz 150 00Hz 15 01Hz 15 00H
17. STOP LED light on indicated that the value of display was Stop frequency of sweep function right now The LED light on indicated that the value of display was center frequency of sweep function right now i GFG 3015 p 13 11 Parameter display Area B 12 Waveform Function LEDs 13 Counter Functions LEDs 14 Modulation Sweep Function LEDs 14 GFG 3015 The FREQ LED light on indicated that the value of display was main output frequency right now The RATE LED light on indicated that the value of display was rate frequency of sweep or modulation or trigger function right now The SPAN LED light on indicated that the value of display was Span frequency of sweep function right now The MHz kHz Hz and mHz 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 AMPU LED light on indicated that the value of display was main output amplitude right now The OFFS LED light on indicated that the value of display was main output DC offset voltage right now The DUTY LED light on indicated that the value of display was main output duty cycle right now The SPAN LED light on indicated that the value of display was span frequency of modulation function right now The SYM LED light on indicated that the value of display was modulation signal duty cycle of sweep or
18. SWEep SPAN Set the value of sweep span lt NRf gt Numeric data SOURce SWEep SPAN Check the value of sweep span None SOURce SWEep RATe Set the value of sweep rate lt NRf gt Numeric data SOURce SWEep RATe Check the value of sweep rate None SOURce SWEep SYM Set the value of sweep SYM lt NR1 gt Numeric data SOURce SWEep SYM Check the value of sweep SYM None GFG 3015 Command Function Parameter Arguments SOURce SWEep SPACing Set the method of sweep NR1 X O Linear lt 1 gt LOG SOURce SWEep SPACing Check the method of None Sweep SOURce TRIGger RATe Set the value of trigger lt NRf gt Numeric data rate SOURce TRIGger RATe Check the value of None trigger rate SOURce TRIGger STATe Set the trigger state NR1 lt 1 gt 0M lt 0 gt OFF SOURce TRIGger STATe Check the trigger state None SOURce TRIGger PHASe Set the value of trigger cNR1 data phase SOURce TRIGger PHASe Check the value of None trigger phase SOURce TRIGger MODe Set the trigger mode NR1 lt 0 gt Single lt 1 gt Mutiple SOURce TRIGger MODe Check the trigger mode None SOURce TRIGger SOURce Set the trigger source lt NR1 gt 0 Internal 1 External SOURce TRIGger SOURce Check the trigger source None SOURce TRIGger SYM Set the value of trigger cNR1 data
19. TIBOUBUT INPUT COUNTER TTL SHAPER GFC 9701 GCV OUTPUT CURRENT SOURCE a gt ATTENUATOR MAIN FREQUENCY D A 9 CURRENT SOURCE DUTYCYCLE D AC AM ON DISPLAY UNIT MOD FUNTION TRIGGER GENERATOR SIGNAL 10KHz 0 01Hz GENERATOR POWER pee 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 setting 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 48 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
20. The Setup of Offset ride tio iba titu ite tisse eet 19 6 6 The Setup of Duly chan ee Sndca n e nnmnnn nnana 20 6 7 Ihe Setting of STORE aeu e haa es a ed 20 6 8 The Setting of RECALL eio teret tane etes tcd 20 6 9 The SHIFT Key and Function 21 6 10 Setup of LIN or LOG nennen nennen 21 6 11 Setup of AM eene ee nennen nnne n nena nnnm 25 6 12 Setup of FM Modulatloh oid suae cue 26 6 13 Set p of Irlg det 28 6 14 Setup of GATE and BURST iei teta inet tDeriesta 30 6 15 Setup of External CoUriter eiii oet terete ehe ce Fore a penis pisa cue 32 6 15 THE VCF FUnhcll n ue Sepp Ee eee ees ee ee 34 6 17 THE GCV Output Function acca eei eerie otro eret 35 6 18 THE TTL Signal Output nnn 36 6 19 THE SYNC Signal Output Function nnn 36 6 20 Remote Control RS232 Interface 36 6 21 Gommands Synta x 1 ecrire Iter cs 38 6 22 The Commands of RS 232 Serial Interface 41 6 23 The Examples of the Communication Interfac
21. 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 Earth terminal marked with the letter E or by the earth symbol or This lead appliance must only d 4 be 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 IMPORTANT contact 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 would normally require 13A types depending on the connection method Blue Neutral used Brown i Any moulded mains connector that requires removal
22. modulation or trigger function right now The PHASE LED light on indicated that the value of display was phase of trigger function right now The ISTORI LED light on indicated that the value of display was save group number right now The RECL LED light on indicated that the value of display was reload group number right now The M fms dBm kHz Hz and DEG 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 FM 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 Triangle and Square LED light on indicated that according Modulation source waveform The EXT LED lights on to indicate the external sweep or modulation signal source The ON OFF LED lights on to indicate that the sweep or modulation function is enabled J
23. other end of the cable to the RS232 port on the GFG 3015 Turn on the GFG 3015 Turn on the computer 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 Should return the Manufacturer model number and firmware version in the following format GW GFG3015 V 1 00 If 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 Command header 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 _ 4 Root node SWEep E 2 Lower lev el nodes 65 1 EE 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
24. p 12 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 LOG S LINS is to choose the type of Sweep between liner sweep and LOG sweep If set to LOG sweep must use Secondary Function mode SWP CF SYM is to set the Duty cycle of Modulation Sweep 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 SYM LED on parameter display area B will be flashing until other mode is set When you use center frequency entry mode then the CF 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 Key is to save or reload the setup parameters of the instrument into or take out from memory the selected numbers is from 0 to 9 up to 10 groups DEFAU 4 522 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 use 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 t
25. void main char command line 100 char Receive Data 100 char Read Machine Number 10 2 IDN W DWORD dwcommand_len 0 dwWritten 0 dwRead 0 int i error_value 0 HANDLE hComm p 44 GFG 3015 initial Data 0 for i 0 i lt 100 i command_line i 0 for i 0 i lt 100 i Receive Data i 0 Create Comm port InitCom error_value dwcommand len sprintf command_line IDN n n 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 print 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 f HANDLE InitCom int Error Value HANDLE hComm COMMTIMEOUTS CommTimeOuts hComm CreateFile COM1 GENERIC_READ GENERIC_WRITE 0 NULL OPEN_EXISTING NULL NULL if Comm INVALID HANDLE VALUE printf 95s Error Message 0 return FALSE Timeout CommTimeOuts ReadlntervalTimeout 1 CommTimeOuts ReadTotalTimeoutMultiplier 0 CommTimeOuts ReadTotalTimeoutConstant 1000 CommTimeOuts WriteT otalTimeoutMultiplier 0
26. 04 A2 2006 Power Frequency Magnetic Field IEC 61000 4 8 2001 Voltage Dips Interrupts IEC 61000 4 11 2004 Safet Low Voltage Equipment Directive 73 23 EEC amp amended by 93 68 EEC Safety Requirements IEC EN 61010 1 2001 GFG 3015 0 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 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 i 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 M otective ATTENTION Double DANGER ESI Conductor Ground High voltage refer to manual Insulated Hot surface Terminal Terminal 2 Do not place any heavy objects on the instrument under any circumstances 3 Disassembling the instrument Due to the precis
27. 0kQ This is the BNC connector for EXT amplitude frequency modulation or EXT sweep signal input The amplitude modulation index is 100 when lt 10 is input The frequency modulation index is 15 when lt 5Vpp is input The trigger mode input signal 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 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 LI IL I IL II IL II AC 115 230 54VA 42W 50 60Hz AC SELECTOR gt ie JL IL IL JL I TL L IL IL II LI I I IL I z Rear Panel GFG 3015 p 16 1 Power Entry model This is the AC power input terminal AC input should be within 7 the range of line voltage 15 50 60Hz
28. 50MHz high frequency range with high resolution INT EXT Press SHIFT GATE J button the and one of the Gate time indicated LEDs will light up also the 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 When the J is pressed the Gate time LEDs will be according to the cycle of 0 015 0 15 1S and 105 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 Frequency Gate Time Display Value State of LEDs Resolution 1Hz 0 01 Sec 1 0000 Hz 100 V Hz 0 1 Sec 1 00000 Hz 10 u Hz GFG 3015 100Hz o 10MHz 100M Hz Note When OVER LED is light on The means that there are still more values 1 Sec 1 00000 Hz 10 u Hz 10 Sec 000 000 mHz OVER 1 u Hz 0 01 Sec 10 000 Hz 1mHz 0 1 Sec 10 0000 Hz 100 u Hz 1 Sec 10 0000 Hz 100 u Hz 10 Sec 0 00000 Hz OVER 10 u Hz 0 01 Sec 100 00 Hz 10mHz 0 1 Sec 100 000 Hz 1mHz 1 Sec 100 000 Hz 1mHz 10 Sec 00 0000 Hz OVER 100 u Hz
29. Function Generator GFG 3015 USER MANUAL GW INSTEK PART NO 82 6 80150 01 180 9001 CERTIFIED MANUFACTURER GWINSTEK 129 This manual contains proprietary information which is protected by copyrights All rights are reserved No part of this manual may be photocopied reproduced or translated to another language without prior written consent of Good Will company The information in this manual was correct at the time of printing However Good Will continues to improve products and reserves the rights to change specitication equipment and maintenance procedures at any time without notice Good Will Instrument Eo Ltd No 7 1 Jhongsing Rd Tucheng City Taipei County 236 Taiwan Table of Contents Page 58 DERI ELE D DM DM 2 2 Product Intro dU On eerte 5 3 3 _ _ _ _ ____2 6 A SSPE CICA ONS iio cioe etie tei teo in tite MS iere tid 7 5 Front and Rear Panels ieu rer heii eee nee 10 6 Operatlotiz uie oie ee A Ie IIl el hill LE lh 18 6 1 The First Step Setup For 18 6 2 The Setup of Output Function eeeeeeeeeeeeeeeeeneneeeeeeeeeseneseneneeeeeeeeeenneeeeeneees 18 6 3 The Setup of Frequerngy ioco esie ot teria et eate dote eter taedet 18 6 4 The Setup of ee eeeeeeeennn nennen nenne nint 19 6 5
30. LS Clear status command None IDN Identification query None RCL Recall command lt NR1 gt lt 0 9 gt SAV Save command lt NR1 gt lt 0 9 gt RST Default setting Commands of the instrument Command Function Parameter Arguments SYSTem ERR Check the type of error None messages FUNCtion WAVeform Set the waveform of main lt NR1 gt 1 Sinusoid frequency 2 Triangle lt 3 gt Square FUNCtion WAVeform Check the present waveform None of main frequency FREQuency Set the main frequency lt NRf gt Numeric data FREQeency Check the main frequency None AMPLitude VOLTage Set the value of output lt NRf gt Numeric data amplitude AMPLitude VOLTage Check the value of output None amplitude AMPLitude UNIT Set the unit of amplitude lt NR1 gt 1 2Vpp 2 Vrms lt 3 gt dBm AMPLitude UNIT Check the unit of amplitude None OFFSet Set the voltage of offset lt NRf gt Numeric data OFFSet Check the voltage of offset None DUTY Set the value of duty lt NR1 gt Numeric data DUTY Check the value of duty None SOURce WAVeform Set the waveform of NR1 1 5Sinusoid modulation mode 2 Triangle lt 3 gt Square GFG 3015 p 41 p 42 Command Function Parameter Arguments SOURce WAVeform Check the present waveform None of modulation mode SOURce STATe Set the modulation function zNR1 0 2OFF lt 1 gt AM lt 2 gt FM lt 3 gt S
31. SYM SOURce TRIGger SYM Check the value of None trigger SYM SOURce COUNIer GATe Set the gate time of NR1 lt 0 gt 001 counter lt 1 gt 01sec lt 2 gt 1sec lt 3 gt 10sec SOURce COUNIer GATe Check the gate time of None counter SOURce COUNter SOURce Set the counter source NR1 0 Internal 1 External SOURce COUNter SOURce Check the counter source GFG 3015 p 43 Error Messages Command Error Error Code SCPI Error Code Explanation 100 Command error 102 Syntax error Execution Error Error Code SCPI Error Code Explanation 220 Parameter error 221 Settings conflict 222 Data out of range 6 23 The Examples of the Communication Interface Software ft kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Microsoft Visual C 6 0 for RS 232 This programming example shows how to communicate PC and instrument via RS232 IDN n Ask the Manufacturer model number and firmware FREQuency 1000 0 Set Frequency 1000Hz kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk E include lt stdio h gt include lt windows h gt HANDLE InitCom int Error_Value char Error_Message 6 Error Create File n Error SetCommTimeous n Error SetCommState n Error SetupComm n Error GetCommState n Error EscapeCommFunctionWn
32. 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 the 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 50 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
33. e Software 44 6 24 The Error message of 47 7 The Block Diagram and Description of the System 48 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 2004 108 EC and Low Voltage Equipment Directive 73 23 EEC amp 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 EN 61326 2 1 requirements Conducted and Radiated Emissions Electrostatic Discharge CISPR11 2003 A1 2004 A2 2006 IEC 61000 4 2 2001 Current Harmonic Radiated Immunity EN 61000 3 2 2006 IEC 61000 4 3 2006 A1 2007 Voltage Fluctuation Electrical Fast Transients EN 61000 3 3 1995 A1 2001 A2 2005 IEC 61000 4 4 2004 Corr 1 2006 Corr 2 2007 Surge Immunity IEC 61000 4 5 2005 Conducted Susceptibility IEC 61000 4 6 2003 A1 20
34. e 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 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 49 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 co
35. ed Example of the Setup Duty 1 To set Duty cycle at 6096 Press Dury first then key in Jana press DEG J 2 To modify Duty cycle to 3096 Press a Jor gt J 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 0 to 9 up to 10 groups totally RECL Push STOR f button Key in the group number from 0 to 9 Press any button from DEG MHz dB KHz Vms or ee to complete the setting Example of the Setup STOR To save a parameter to the RAM of group 5 RECL Press sroR irs then key in 5 and 850 I 6 8 The Setting of RECALL The Recall button can retrieve the parameters saved in the RAM RECL Push smrr_Jand_ stor J button Key in the group number from 0 to 9 Press any button from PEG MHB to complete the setting Example of the Setup RECALL To retrieve a parameters from the RAM of group 6 RECL Press SHIFT J and STOR I first then 6 Jana press HzV 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 887
36. eed 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 Signal Type Synchronize with main output Procedure 0 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 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 PIN 2 PIN 2
37. equency 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 Po 8S 1 5001 MHz 15 0000MHz 150kHz 15MHz 150 01kHz 1 50000MHz PB 15 001 KHz 150 000kHz 1 5kHz 150kHz 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 Example of the Setup of FM Modulation To set the following conditions Main function Sine Wave Main Frequency 100kHz M Modulation rate 1kHz Main Output Amplitude 10Vpp Modulation Signal Source Sine Modulation Deviation 10 Modulation Signal Symmetry 50 9 Modulation Mode Frequency Modulation Source INT Procedure Press FUNC hio select SINE wave for main output GFG 3015 p 27 Press 1 Jin sequence Then press FRO 1 J y 0 in sequence FM Press SHIFT AM to set FM mode
38. et the following conditions Output function Sine Wave Start frequency 1kHz Output Amplitude 10Vpp Stop frequency 10kHz Sweep mode LIN Sweep signal symmetry 50 Speed 1 second p 22 GFG 3015 Procedure Press LX to select SINE wave for main output Press amer I 2 I Bayne Jin sequence LOG S Then press UNS Jio select linear sweep mode INT EXT Press RATE 1 I Jin sequence STOP Press START J 1 KHz Vrms Jin sequence STOP Press START 1 J 0 KHz Vrms J in sequence SWP CF Press sym I 5 J 0 J DEG Jin sequence The Modulation Sweep Output BNC will output 1Hz Triangle wave In addition you can use J P Jac the Rotate Knob to modify the value you need Example of the Setup of LOG Sweep To set the following conditions Output function Triangle Wave Start frequency 10kHz Output amplitude 10Vpp Stop frequency 100kHz Sweep mode LOG Sweep signal symmetry 90 Speed 0 1 second Procedure Press FUNC Jo select TRIANGLE wave for main output Press MM J 1 I g J HNR Jin sequence LOG S Then sar II LINS J to select LOG sweep mode INT EXT Press RATE 1 0 J Hz Vov Jin sequence STOP Press starr J 1 0 J E sequence STOP o Press SHIFT START 1 0 II 0 J KHz Vrms Jin sequence SWP CF Press 5 2 I DEG Jin sequence
39. g 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 0 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 to 70 when 35 C 40 C Installation category CAT I 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 For measurements performed in the building installation CAT For measurements performed on circuits directly connected to the low voltage installation CAT I For measurements performed on circuits not directly connected to Mains 9 Place GFG 3015
40. he 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 51
41. ion 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 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 Figure 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 settin
42. ion will stop When the key is pressed the ON OFF LED In Trigger Function LED area will light up until the key is pressed again The LED will light off sicumur Key is to choose the type of Trigger Single trigger or multi trigger When the key is pressed the MULT or SINGL LED In Trigger Function LED area will light up accordingly I i 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 i TRIG EXT f Key is to choose the Trigger signal source internal or external EN 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 cate f 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 START LED light on indicated that the value of display was Start frequency of sweep function right now The
43. lue 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 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 Example of the Setup Frequency 1 To set frequency at 250Hz Press FREO then key in 2 5 f ana Hzv J p 18 GFG 3015 2 To modify the frequency to 850Hz Press Jor gt move flash digit to 2 position Then turn the Rotate Knob clockwise until the digit become to 8 6 4 The Setup of Amplitude Set to Main Amplitude entry mode by pressing MPL J button to now the AMPL LED In parameter display area B will be flashing Key in the desired value of Amplitude Select a proper unit button to specify the value n addition you can use Jor gt Jano 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 then key in 8 band press IL 2 To modify the Amplitude to 5 Vpp Press jor gt move flash digit to
44. ment After show the message The Display area will back to original state Before press the button NA mU m me e gum A SAT FC V 8170 8170 stor rib IV TEES eel I II II IC ICT ae ac 1515007 Ag toda 7 roy E i3 t i3 t i3 p 24 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 Set the main output function by using FUNC button Set the main output frequency by using FREO button and number keys Set the main output Amplitude by using AMPL button and number keys FM Select the modulation mode by using M button INT EXT Select the modulation signal source by using _ SHIFT INT EXT Press BATE I set up modulation RATE value Range 0 01Hz 10kHz SOURCE Select the modulation signal by pressing SHIFT J SPAN buttons GFG 3015 offers sine square and triangle ramp signals for internal modulation SOURCE Select the amplitude modulation depth by pressing SP N Jbuttons Range 100 SWP CF Press sym set the Duty of modulation signal Range 90 10 90 O Press Mob oN I start performing amplitude modulation Note 1 Please refer to the setup of amplitude modulation as the example belo
45. 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 0 The calculation of setting 1 Trigger Rate Gate period 10ms 100Hz 2 Symmetry of Trigger signal 100 10mS 6 5 10 5 100 60 Press FUNC fio select Triangle wave for main output Press wn 1 0 von Jin sequence Then FREo 1 Ix in sequence Press SisuMur set Trigger Type to Multi Trigger Press EI select the source from internal signal 0 GFG 3015 p 31 INT EXT Press RATE 1 J 0 0 Jin sequence SWP CF e Press SYM J 6 J DEG Jin sequence PHASE J 0 DEG Jin sequence Press TRIG ON J The 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 p 32 The GFG 3015 provides a high performance external frequency counter and with 6 digits counter and up to 1
46. o default state must use Secondary Function mode SHIFT ey 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 DEFAU For example press sur n RS232 recall the default value of the instrument Du Hal uum ag Jin 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 9 are used to input value A unit key should be pressed to set the entered value d JBKSP f is blank space that used to delete the entered value entirely and the other function is minus key gt are used to change the digit of input k value User can use the Rotate knob for increasing or decreasing that digit g HoLD Key to terminate the function of all Modify keys until user press this key again When the key is pressed the HOLD LED will light up until the key is pressed again d TRIG ON f Key is to start performing Trigger function mode If the key is pressed again the funct
47. oltage 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 OFFS LED on parameter display area B will be flashing until other mode is set g 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 DUTY LED on parameter display area B will be flashing until other mode is set i MOD ON J 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 ON OFF 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 AM 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 RATE Key is to set Rate of Modulation Sweep or 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
48. r As there is no signal of end message on RS232 bus therefore use LF Line Feed 0x0A 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 Commands 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 C
49. replacement must ase 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 frequency from GFG 3015 Function Generator Besides the GFG 3015 can also generate a high accuracy frequency to provide high frequenc
50. requency range Please refer to the Note 2 for the details The sweep can also be done by enter Center frequency or Span frequency Press _ SHIFT mm Jior center frequency entry mode Note 3 SOURCE Press SPAN for span frequency entry mode Note 3 SWP CF Press sym set the Duty of sweep signal Range 90 10 90 Press MOb 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 frequency 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 s
51. rresponding 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 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
52. s except the one set Single trigger of the Trigger Type Trigger type Single Trigger Procedure Press mer I 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 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 Burst period x100 The Burst period gt Burst Count x Main Frequency period e Set the Trigger Type to Multi Trigger type 9 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 0 The calculation of setting 1 Trigger Rate Burst period
53. 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 and 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 t
54. 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 the 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 Square 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 th
55. uency 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 VCF Frequency variation Range 150kHz 15MHz 15kHz 1 5MHz 1 5kHz 150kHz 150Hz 15kHz 15Hz 1 5kHz 1 5Hz 150Hz 0 15Hz 15Hz 0 01Hz 1 5Hz Number of Range Setting Frequency Range 8 1 5001 MHz 15 0000MHz 7 150 01kKHz 1 50000MHz 6 15 001kHz 150 000kHz 5 1 5001kHz 15 0000kHz 4 150 01Hz 1 50000kHz 3 15 01Hz 150 00Hz 2 1 51Hz 15 00Hz 1 0 01Hz 1 50Hz 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 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 0 Press ww to select SINE wave for main output Press Jos Jom in sequence 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 p 34
56. w 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 Main Output Amplitude 10Vpp Modulation Signal Source Sine Modulation Depth 80 Modulation Mode Amplitude Modulation Signal Symmetry 50 Modulation Source INT Procedure Press FUNC hio select SINE wave for main output GFG 3015 p 25 Press 1 Hym Jin sequence Then press FRO I J 1 gt in sequence FM Press set AM mode INT EXT Press SHIFT J RATE select the source from internal signal INT EXT Press un 1 0 0 ave Jin sequence SOURCE Press SHIFT J SPAN Jio select the modulation signal on SINE wave SOURCE Press SPAN 8 J 0 oso in sequence SWP CF Press sym 5 DEG Jin sequence Press movos The MOD Output BNC will output 100Hz sine wave In addition you can use
57. weep SOURce STATe Check the modulation None function SOURce SOURce Set the modulation source lt NR1 gt O sInternal lt 1 gt External SOURce SOURce Check the modulation None source SOURce MODAM RATe Set the value of AM Rate lt NRf gt Numeric data SOURce MODAM RATe Check the value of AM Rate None SOURce MODAM SPAN Set the value of AM span lt NR1 gt Numeric data SOURce MODAM SPAN Check the value of AM span None SOURce MODAM SYM Set the value of AM SYM NR1 Numeric data SOURce MODAM SYM Check the value of AM SYM None SOURce MODFM RATe jSetthe value of FM Rate lt NRf gt Numeric data SOURce MODFM RATe Check the value of FM Rate None SOURce MODFM SPAN Set the value of FM span lt NR1 gt Numeric data SOURce MODFM SPAN Check the value of FM span None SOURce MODFM SYM Set the value of FM SYM NR1 Numeric data SOURce MODFM SYM Check the value of FM SYM None SOURce SWEep STARt the value of sweep start lt NRf gt Numeric data frequency SOURce SWEep STARt Check the value of sweep None start frequency SOURce SWEep STOP Set the value of sweep stop lt NRf gt Numeric data frequency SOURce SWEep STOP Check the value of sweep None stop frequency SOURce SWEep CENTer Set the value of sweep lt NRf gt Numeric data center frequency SOURce SWEep CENTer Check the value of sweep None center frequency SOURce
58. xample below 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 It 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 Procedure Press IV hio select SINE wave for main output Press AMPL 1 0 Jin sequence Then press _ FRE 2 Jin sequence Press hio set Trigger Type on Multi Trigger o Press lt I select the source from internal signal INT EXT PATE 1 sequence SWP CF Press sym 5 DEG Jin sequence Press PHASE 3 0 DEG Jin sequence Press TRIG ON II The Trigger Function will perform on output terminal Please see Figure 1 Besides you can use 4 gt and the Rotate Knob to modify the value you need 9 eo Another Example of the Setup of Trigger Function All the setting conditions are the same as above mentioned example
59. y resolution Graph1 indicates the fundamental construction of a frequency feedback system D A Convertor 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 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 All digitized operation user interface Output Waveforms of Sine Square Triangle Ramp Pulse AM FM Sweep Trigger and Gate or Burst Wide output frequency range 0 01Hz 15MHz High frequency accuracy 0 02 5 count Maximum frequency resolution 10mHz Dual displays indicate frequency and amplitude or other necessary information Built in 6 digit INT EXT Function Counter and up to 150MHz frequency range with high resolution INT EXT AM FM Modulation with internal modulation signal output LIN LOG Sweep Mode with internal sweep signal output VCF of 100 1 EXT Frequency Control SYNC Output TTL Output Synchronization GCV Output lt Variable DC Offset Control Output Overload Protection
60. z 1 51Hz 1 50Hz 0 01Hz Example of the Setup of GCV To set the following conditions Get 2V from GCV output BNC connector 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 setting different frequency value Please refer to the following 1 Press mro 1 5 LC 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 Set the main frequency to 5kHz refer to 6 3 The Setup of Frequency 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 n
61. z 0 15Hz 15Hz 0 01Hz 1 5Hz 100 1 In Same Frequency Range ERREUR pc pet ceu Sweep Range Sweep output 0 to2 5Vp p into 10k Q Tubes AM FM Sweep Trigger int ext Gate or Burst Implement by Trigger Type Sine Square Triangle Ramp or id Variable Symmetry Pulse Rate Frequency 10mHz 10KHz in Frequency Range 5 1 count 10 0kHz 0 1KkHz 100Hz Rate Frequency 99Hz 1Hz 1Hz Symmetry 90 10 90 Resolution 1 Symmetry Accuracy 1 lt 1 Output Level 1Vpp into 10kQ load lt 2 from 10Hz to 10kHz Sine Wave Distortion Amplitude Modulation Depth 0 100945 Modulation 0 10kHz INT DC 1MHz EXT Frequency Rate Bandwidth _ lt 100H2 to gt 5MHz External Sensitivity lt 10Vpp for 100 modulation Frequency Modulation External Sensitivity s5Vpp for 15 deviation Trigger VCF TTL Output GCV Output Frequency Counter Interface Accessories Power Source Dimensions Weight Gate or Burst Range Fan out INT EXT Resolution Sensitivity RS232 GTL 101 x 2 Instructi 115 230V AC 15 Approx 5kg Start Stop Phase To set the voltage 90 802 Implement by Trigger setting 100 1 0 to 10V 1V In Same Frequency 10kQ gt 10 TTL Load between 0 2V to 2V as per different Frequency in Same frequency Range Switch Selector
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