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1. J Note If you want to install the upper cover please reverse above steps 7 3 Cleaning To keep the instrument clean wipe the case with a damp cloth and detergent Do not use abrasives or solvents 362. Ez wapa aD D GO C CO CU FUNCTION GENERATOR SERIES INSTRUCTION MANUAL Fig 4 2 REAR PANEL m A 9 0 4 a Ro US RF Rs UE hs Nu lt 52 9236 L 3 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 4 FUNCTION DESCRIPTION 1 Power Switch 2 Gate Time Indicator 2a Gate Time Selector 3 Over Indicator 4 Counter Display 5 Frequency Indicator 6 Gate Time Indicator 7 Frequency Range Selector Connect the AC power then press power switch Press the power switch Gate time indicator will start to flash the gate time of internal counter is 0 01 second Press this key to change gate time when use external counter mode The change order is according to 0 01s 0 1s 1s 10s cycle by pressing these keys In the external counter mode the indicator is illuminated when the output frequency is greater than the range selected Shows the external frequency by 6 x 0 3 green display and shows the internal frequency by 5 x 0 3 green display Indicate the current frequency value Indicate the current Gate time external counter mode use onl
3. FEATURES COMPARISON TABLE FOR MODELS S RE GFG GFG GFG GFG GFG GFG FEATUR 8215A 8216A 8217A 8219A 8250A 8255A AM FM gt cum V y SWEEP v V V COUNTER Vv V V v V GCV Output v V TTL CMOS v v 7 v V v VCF V Vv Vv v V v Duty Cycle m Control 6 FUNCTION GENERATOR SERIES FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 3 SPECIFICATION GFG GFG 8215A 8216A 8217A 8219A 8250A 8255A 1 Main Frequency Range 0 3Hz 3MHz 7 Range 0 5Hz 5MHz 7 Range Amplitude 10Vpp into 50Q load 10Vpp into 50Q load Impedance 50Q 10 50Q 10 Attenuator 20dB 1dBx2 20dB 1dBx2 lt 5 gt 5 lt 5 gt 5 Peat into 50 Q load into 50 Q load Dutv Control 80 20 80 to IMHz 80 20 80 to IMHz SE EUMD Continued variable Continued variable 6 digits LED display Display GFG 8215A does not have 6 digits LED display display INSTRUCTION MANUAL GFG GFG 8215A 8216A 8217A 8219A 8250A 8255A 5 CMOS Output Level 4 1 14 5Vpp 4Vpp 1Vpp 14 5Vpp ib 0 5Vpp adjustable 0 5Vpp adjustable Rise or Fall Time lt 120ns lt 120ns 6 TTL Output Level 3Vpp 3Vpp Fan Out 20 TTL load 20 TTL load Rise or Fall Time lt 25ns lt 25ns 7 VCF Input voltage OV 10 1 100 1 OV 10 1 100 1 Input Impedance 10k Q 10 10k Q10 8 GCV for GFG 821
4. 5 3 Pulse wave generation 1 First press the key alike of Function 8 then select Range 7 and rotate FREQ 13 to set required frequency range 2 Connect output terminal 22 to oscilloscope for observing output signal 3 Pull out and rotate Duty to adjust the width of pulse waveform 4 Adjust AMPL 12 knob to control pulse amplitude 5 Pull out AMPL 12 knob to get 20dB attenuation of output 5 4 Ramp wave generation 1 First press the key of Function 8 then select Range 7 rotate FEEQ 13 switch to set required frequency range 2 Connect output terminal 22 o oscilloscope for observing output signal 3 Pull out and rotate DUTY Q to adjust the slope of ramp waveform 4 Adjust AMPL 12 knob to control output amplitude of ramp waveform 5 Pull out AMPL 12 knob to obtain 20dB attenuation of output 5 5 TTL CMOS signal output 1 First select Range 7 rotate FREQ 13 to set required frequency range 2 Connect BNC connector of TTL CMOS 20 to oscilloscope or to other experiment circuit for observing output signal 3 At this moment output is square waveform fixing to TTL level suits for general TTL integrated circuit 4 If square waveform of CMOS level is required can pull out CMOS 10 knob to adjust voltage level 19 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 5 6 Variation of external voltage controlled frequency This mode of operation allows the user to adjust the frequency of
5. d To test CMOS circuit by pulling up the switch of TTL CMOS and adjust CMOS level by rotating the switch to set the proper level e Use dual trace scope to show the input output timing relation judged by the two waves shown in Figure 4 F Testing of speaking and impedance network This equipment can be used to test the frequency characteristics of speaker or any impedance network It also can get the resonant frequency of network a Connect the device under test as in Figure 8 can use oscilloscope in stead of voltmeter b When use voltmeter adjust the frequency of instrument record down voltage relative to frequency c When testing speaker if there is a peak volt value when in low freq this must be the resonant freq of this speaker see Figure 10 Whether installation may cause any effect to this frequency or not The proper design of case installation will cause two small ramps on both sides of this sharp ramp d In testing other impedance network the resonant may not occur in low frequency But in approaching the resonant frequency there are still increasing in voltage then the impedance can be tested as following 25 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 1 Series connect a R1 to the network under test as in Figure 9 2 Get voltage read out in El E2 adjust R1 until E2 is equal to one half of E1 3 Under this frequency the impedance network is the same as the G Act as automati
6. Function Generator series are stable low distortion instruments which generate signals in the frequency range up to 5MHz Typical applications include a wide range of audio response testing applications vibration testing servo system evaluation ultra sound applications and etc These instruments include the following features logarithmic and linear sweep capabilities together with a built in frequency counter The sweep capability simplifies the task of finding resonant points of speakers filter networks and other networks structures An oscilloscope may be connected to this instrument for the response to be displayed The counter can be switched to measure and display the frequency of an external signal up to 150MHz ADDITIONAL FEATURES 1 Low distortion waveforms sine triangular and square and ramp signal 2 Signal output in seven decade stages 0 5Hz to 5MHz for GFG 8250A 8255A 0 3Hz to 3MHz for GFG 8215A 8216A 8217A 8219A 3 Adjustable sweep time and sweep width both in linear and logarithmic modes 4 Duty cycle control with signal inversion capability 5 External Voltage controlled Frequency VCF 6 AM or FM modulation modes with internal or external modulation control FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 7 A second output for TTL or adjustable CMOS pulses 8 50 ohm main signal output with DC offset adjustment and 20dB attenuation capability 9 Supplied with two BNC test leads and AC power cord set
7. GENERATOR SERIES INSTRUCTION MANUAL TABLE OF CONTENTS 1 5 2 0 0 2 INTRODUCTION etenim SPECIFICATION ree rtp owes 4 FUNCTION 2 722 2 2 8 USAGE DESCRIPTION 2 n rnt Rd er RIPE Ra 6 APPLICATION 70 7 2 7 MAINTENANCE REID ES FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 1 SAFETY TERMS AND SYMBOLS Please take a moment to review these safety terms and symbols which may appear in this manual or on Equipment to prevent damage to the Function Generators WARNING Warning statements identify condition or practices that could result in injury or loss of life CAUTION Caution statements identify conditions or N practices that could result in damage to this product or other property FUNCTION GENERATOR SERIES INSTRUCTION MANUAL DANGER High Voltage ATTENTION refer to Manual Protective Conductor Terminal Ft gt ground Earth Terminal Frame or Chassis Terminal FUNCTION GENERATOR SERIES INSTRUCTION MANUAL FOR UNITED KINGDOM ONLY NOTE This lead appliance must only be wired by competent persons WARNING THIS APPLIANCE MUST BE EARTHED IMPORTANT The wires in this lead are coloured in accordance with the following code Green Yellow Earth Blue Neutral Brown Liv
8. 9A 8255A only Range Accuracy 5 1Hz at 3 0 position only for GFG 8215A Output voltage To set the voltage between OV 2V as per different frequency To set the voltage between OV 2V as per different frequency 9 Sweep Operation for GFG 8217A 8219A 8255 A only Sweep Manual Switch selector Switch selector Sweep Rate 100 1 ratio max and adjustable 100 1 ratio max and adjustable Sweep Time 0 5Sec 30Sec adjustable 0 5Sec 30Sec adjustable Sweep Mode Lin Log switch selector Lin Log switch selector 10 Amplitude Modulation for GFG 8219A 8255A only Depth 0 10096 0 100 MOD Freq 400Hz INT DC IMHz EXT 400Hz INT DC IMHz EXT Carrier BW 100Hz 3MHz 3dB 100Hz 5MHz 3dB EXT Sensitivity lt 10Vpp for 100 modulation lt 10Vpp for 100 modulation 2 Sine Wave Distortion lt 1 0 3Hz 200kHz lt 1 0 5Hz 100kHz lt 0 3dB 0 3Hz 300kHz lt 0 3dB below 500kHz Flatness lt 0 5dB 300kHz 3MHz lt 1dB below 5MHz 3 Triangle Wave Li 98 0 3Hz 100kHz 98 0 5Hz 100kHz gt 956 100kHz 3MHz gt 959 100KHz 5MHz 4 Square Wave Symmetry 296 0 3Hz 100kHz 296 1Hz 100kHz lt 100ns at maximum output lt 50ns at maximum output Rise or Fall Time into 50 Q load into 50 Q load FUNCTION GENERATOR SERIES INSTRUCTION MANUAL GFG GFG 8215A 8216A 8217A 8219A 8250A 8255A 11 Fre
9. 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 8215A GFG 8216A GFG 8217A GFG 8219A GFG 8250A GFG 8255A are 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 EN 61326 1 Electrical equipment for measurement control and laboratory use EMC requirements 1997 1 1998 Conducted and Radiated Emissions Electrostatic Discharge EN 55011 Group I class A 1991 EN 61000 4 2 1994 Current Harmonic Radiated Immunity EN 61000 3 2 1995 ENV 50140 1993 Voltage Fluctuation Electrical Fast Transients EN 61000 3 3 1995 EN 61000 4 4 1995 Surge Immunity EN 61000 4 5 1995 Conducted Susceptibility EN 61000 4 6 1996 Power Frequency Magnetic field EN 61000 4 8 1993 Voltage Dips Interrupts 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 FUNCTION
10. ICA L SINE WAVE TTL CMOS VARY THE DUTY OF LONGER TIME SECTION BY ADJUSTING THE DUTY CONTROLLER 22 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 6 APPLICATION NOTE This section describes the application of the Function Generators in details as well as a brief description relating to the block diagram Only for the essential application method A Trouble shooting using signal tracing method This method is similar to signal replacing way The signal of model will be fixedly sent to input terminal Observing its signal wave on the oscilloscope from front stage to rear stage orderly until appear a signal with normal input but with abnormal output B Use as bias source and signal source circuit Utilize the Figure 4 of connecting type which can provide bias of a transistor and signal input The output waveform can be observed from oscilloscope Adjust to the best condition with output max amplitude and no distortion Adjust DC OFFSET to see the different effect of different bias condition C Amplifier over load characteristics The Sine wave input will be different from output the overload point Using Triangle wave will easily observe the display of oscilloscope It can decide the linear range of output waveform And the largest no distortion output amplitude 23 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL D Using the Square wave test the characteristics of amplifier circuit It can t a
11. TOR SERIES INSTRUCTION MANUAL FIGURE 9 pe ere aco PME TE SS 1 IMPEDANCE Som NE 5 RI OF SPEAKER 9 SYSTEM P Casas Ds s 3 When E2 1 2Ey _ Z R1 FIGURE 10 dB PEAK OF AUDIO DRIVE RESPONSE 20 10 6 CORRESPONDENT RESPONSE 10 100 1k 10k 100k FREQUENCY Hz 31 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL FIGURE 11 POWER AMP SP Lau FUNCTION GENERATOR 32 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 7 MAINTENANCE The following instructions are used by qualified person only to avoid electrical shock do not perform any service other than contained in the operation instructions unless you are qualified to do so 7 1 Fuse Rating and type If the fuse blows the FUNCTION GENERATOR will not operate Try to determine and correct the cause of the blown fuse then replace the fuse with correct rating and type shown as below FUSE Rating and Type Rating Input MADEL 115V 230V Watts VA GFG 8215A 0 315 250V 0 16 250V 22 28 GFG 8216A T0 315A 250V 0 16 250V 25 32 GFG 8217A T0 315A 250V 0 16 250V 27 34 GFG 8219A T0 315A 250V 0 16 250V 29 36 GFG 8250A T0 315A 250V 0 16 250V 25 32 GFG 8255A T0 315A 250V 0 16 250V 29 36 WARNING For continued fire protection replace only N with 250V fuse of the specified type and rating
12. TOR SERIES INSTRUCTION MANUAL 12a 20dB Attenuation Press the knob to adjust a 20dB output 13 14 15 16 17 18 MANU SWEEP Press and turn clockwise the knob for MAX frequency Selector and and invert for MIN frequency Keep the pointer within Frequency the scale range on the panel Adjustment Pull out the knob to start the auto sweep operation the Sweep On Off upper frequency limit is determined by the knob position Sweep Time 1 Rotate the knob clockwise to adjust sweep time for Control and MAX or invert for MIN LIN LOG 2 To proceed Linear sweep mode by pushing in the Selector knob or select LOG sweep mode by pulling out the knob Control MOD Pull out the knob the output can be modulated by ON OFF Selector internal 400Hz Sine wave or an external signal via VCF MOD in connector 21 Sweep Width amp 1 Sweep width be controlled from 0 to 1000 times Modulation 2 To adjust modulation ratio by turning the knob Carrier amp AM FM clockwise for MAX or invert for MIN Selector amp FM 3 Press the knob to get AM function or pull it out for Selector FM function INT EXT MOD When press the button once the indicator will lighten Selector then the EXT MOD has been selected Press the key again the indicator will be off then INT MOD has been selected INT EXT Counter Select internal counter mode count the frequency of Selector model or select EXT counter mode for an independ
13. and disconnect the power cord before proceeding fuse replacement 33 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 7 2 Fuse Replacement Procedure When you proceed calibration or maintenance of the Function Generators if you want to replace the fuse the upper cover must be removed according to the following steps 1 The handle must be turned downward 90 degrees first 34 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 2 Pull apart the handle from the Function Generator Please turn the handle left and right side slightly that will make easier to pull off the handle L xoc e io HHHBHBHHHHHHHHHHHHH 3 There are two washers inside of two holes the joints of handle and case respectively Please use a screwdriver to pry open these washers m 35 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 4 Please use a screwdriver to open the screw located at upper side of rear panel Therefore the upper cover can pull toward the backside In the meantime the upper cover is moved fee eee OO m RU
14. ation mode 4 Adjust MOD 16 to achieve required modulation ratio 5 9 Precaution item 1 Adjust DC OFFSET will provide to change voltage of 10V no load or 5V 50Q load However signal added DC level is still limited to 20V no load or 10V 50 load In case of over voltage clip will appear as shown in Figure 2 2 Output connector label 50 Q indicated that signal source impedance is 50Q Connect to any of impedance circuit but output voltage and terminal impedance will be rated To avoid oscillation terminal shall be connected to 50 When using high frequency and square output and its connecting line shall be as short as possible 3 When adjust Duty knob to leftward position the ratio of positive state to negative state expand to not less than 80 20 It can expand Square wave to Pulse wave expand Triangle wave to Ramp wave and Sine wave to unsymmetrical Sine wave As shown in Figure 3 is for adjustment of Duty control to obtain required waveform FUNCTION GENERATOR SERIES INSTRUCTION MANUAL Figure 2 A Zero DC Offset with Maximum signal B Offset Limit without Clipping POSITIVE NEGATIVE DC OFFSET DC OFFSET C Excessive Offset All examples Output terminated ohm POSITIVE NEGATIVE DC OFFSET DC OFFSET Figure 3 VARY THE DUTY OF SHORTER TIME SECTION BY ADJUSTING THE FREQUENCY ADJUSTMENT DIAL mE PULSE SQUARE WAVE RAMP TRIANGLE WAVE UNSYMMETR
15. ays to observe waveforms by connecting the instruments to Oscilloscope Watch the effect in different control of waveforms through Oscilloscope carefully when proceeding the following steps 5 1 First step check 1 Ensure that the voltage of the main supply is compatible with this instrument The label on the rear panel states the required AC voltage 2 Connect the instrument to the main supply using the power cord supplied 3 Press PWR switch 1 and ensure all the rotary controls are pushed in then rotate AMPL 12 knob to make the indication point up forward 4 Rotate the FREQ 13 control fully anticlockwise 17 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 5 2 Triangle square and sine wave 1 First select Function 8 and select Range 7 rotate FREQ 13 to set the required frequency read out from display window 2 At this moment connect Output 22 to oscilloscope for observing output signal or connect to other experiment circuit 3 Rotate AMPL 2 again to control waveform amplitude 4 If attenuation output signal is required pull out AMPL 12 knob to obtain 20dB attenuation or press 12a knob for additional 20dB attenuation 5 The phase relation of Output Waveform shown in Figure 1 as below Figure 1 TTL PULSE OV TRIANGLE ov ANAN Z SINE ov SQUARE m I S FUNCTION GENERATOR SERIES INSTRUCTION MANUAL
16. c test of speaker Because there provide the auto feature in this equipment the output can drive to amplifier for testing the frequency response of speaker a Set Auto Manual to Auto position b Set function to Sine wave c Set Range to 20kHz d Sweep mode LIN LOG sweep width sweep time can be set in any value e The line connected is showed in Figure 11 26 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL FIGURE 4 WAVEFORM OUTPUT WAVEFORM 27 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL FIGURE 5 I W zsoooooo gl AMPLIFIER 28 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL FIGURE 6 of low frequency No phase shift Low frequency phase shift high frequency loss Low frequency High frequency loss No phase shift phase shift and phase shift trace thickened by hum voltage Low frequency loss High frequency loss Damped oscillation Standard and low frequency and low frequency square wave phase shift phase shift 29 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL FIGURE 7 Square Wave Clock Pulse Gated Pulse m Train FUNCTION GENERATOR Digital Circuit Under Test FIGURE 8 SPEAKER CASE OR NETWORK VTVM OR OSCILLOSCOPE 30 FUNCTION GENERA
17. cessories Instruction manualx1 Dimension 251 W x91 H x291 D m m 251 W x91 H x291 D m m Approx 2 0kgs GFG 8215A 2 1kgs GFG 8216A 2 15kgs GFG 8217A 2 2kgs GFG 8219A Approx 2 3kgs GFG 8250A Weigh 2 4kgs GFG 8255A Measurement category is for measurements performed on circuits not directly connected to MAINS Measurement category Il is for measurements performed on circuits directly connected to the low voltage installation Measurement category Ill is for measurements performed in the building installation Measurement category IV is for measurements performed at the source of the low voltage installation WARNING To avoid electrical shock the power cord protective grounding conductor must be connected to ground CAUTION To avoid damaging the instrument do not use it In a place where ambient temperature exceeds 40 C CAUTION To avoid damaging the instrument do not input more than DC15V to V C F V C G CAUTION To avoid damaging the instrument do not input more than AC150V to Frequency Counter for GFG 8216A GFG 8217A GFG 8219A GFG 8250A and 8255 CAUTION To avoid damaging the instrument do not input more than AC10Vpp when proceed EXT modulation operation for GFG 8219A GFG 8255A gt P PPP FUNCTION GENERATOR SERIES INSTRUCTION MANUAL Fig 4 1 FRONT PANEL CO 9 f pa B 1 m 8888881
18. ctually explain the transient response of amplifier by using Sine wave for the frequency response curve observation but using the high order poly wave Square wave instead to display its waveform from the oscilloscope can show up many characteristics of amplifier a Using the circuit of figure 5 the 50 connector trim the oscillation effect of Square wave b Use the output of Triangle wave adjust the amplitude until there are no clipping happened in the applied frequency c Select Square wave adjust frequency choose to watch the wave form of middle of amplifier pass band like 20Hz 1kHz 10kHz and etc d The output waveform of c must get something with frequency Figure 6 shows some possible conditions CAUTION The composed poly wave frequency of Square wave is quite large so it s not suitable for the narrow band amplifier testing E Test of logic circuit This equipment is suitable for logic circuit testing Using Square or Pulse wave can analyze or watch the frequency waveform of a designed testing circuit Also the DC Offset effect drive the plug in model board or logic circuit trouble shooting and etc Used as signal tracing and signal replacing operation 24 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL a Connect the lines as Figure 7 b According to the operation guide in this manual set Square wave or Pulse wave output c Use the label TTL CMOS output terminal testing TTL logic circuit
19. e Phase As the colours of the wires in main leads may not correspond with the colours marking identified in your plug appliance proceed as follows The wire which is coloured Green amp Yellow must be connected to the Earth terminal marked with the letter E or by the earth symbol or coloured Green or Green amp Yellow The wire which is coloured Blue must be connected to the FUNCTION GENERATOR SERIES INSTRUCTION MANUAL terminal which is marked with the letter N or coloured Blue or Black The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown or Red If in doubt consult the instructions provided with the equipment or contact the supplier This cable appliance should be protected by a suitably rated and approved HBC mains fuse refer to the rating information on the equipment and or user instructions for details As a guide cable of 0 75mm should be protected by a or fuse Larger conductors 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 amp fuse carrier and disposed of immediately as a plug with bared wires is hazardous if a engaged in live socket Any re wiring must be carried out in accordance with the information detailed on this label FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 2 INTRODUCTION The
20. ent counter input signal from BNC 19 15 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 19 EXT Counter Accepts external signals for measurement Input Terminal 20 TTL CMOS TTL CMOS compatible signal output Output Terminal 21 VCE MOD Used to connect the input voltage required to perform Input Terminal the voltage control frequency operation or the EXT modulation operation 22 Main Output Main signal output Terminal 23 GCV Output This is DC voltage output and its voltage amount will follow the change of Frequency 24 Power Switch 115V and 230V selectable Remark 1 The functions of item 2 2a 3 4 5 6 14 15 16 17 19 and 23 can not be applied to model GFG 8215A 2 The functions of item 14 15 16 17 and 23 can not be applied to GFG 8216A and GFG 8250A 3 The function of item 15 16 2 16 3 17 and 23 can not be applied to GFG 8217A 4 The function of item 20 for GFG 8216A 8250A can be selected from front panel 5 The function of item 20 and 21 for GFG 8215A can be selected from front panel FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 5 USAGE DESCRIPTION These function generators can provide versatile waveforms of high efficiency and convenient operation Familiarize yourselves with these functions thoroughly through Operation Manual and practice with all accurate operation procedures can lead you to easily master the performance of these Function Generators It is one of the best w
21. quency Modulation for GFG 8219A 8255A only Deviation 0 5 0 5 MOD Freq 400Hz INT DC 20kHz EXT 400Hz INT DC 20kHz EXT EXT Sensitivity lt 10Vpp for 10 modulation 10 for 1090 modulation 12 Frequency Counter 0 1Hz for 1OOMHz Int Ext Switch selector Switch selector R 0 3Hz 3MHz 0 5Hz 5MHz ange 5Hz 150MHz EXT 5Hz 150MHz EXT Accuracy Time base accuracy 1 count Time base accuracy Icount 5 35 Time base 220 23 5 after 220 23 C 5 after 30 minutes warm up 30 minutes warm up The maximum resolution is 10nHz The maximum resolution is Resolution for 1Hz and 10nHz for 1Hz and 0 1Hz for 100MHz Input Impedance 150 1 150 Sensitivity lt 35mVrms 5Hz 100MHz lt 45mVrms 100MHz 150MHz GFG 8215A does not have Frequency Counter function lt 35mVrms 5Hz 100MHz lt 45mVrms 100MHz 150MHz 13 General Power Source ACLISV 230V11596 50 60Hz 15 230V 15 50 60Hz Operation Environment Indoor use altitude up to 2000m Ambient Temperature 0 to 40 C Relative Humidity 80 Maximum Installation category II Pollution Degree 2 Storage temperature amp Humidity 10 C to70 C 70 Maximum FUNCTION GENERATOR SERIES INSTRUCTION MANUAL GFG GFG 8215A 8216A 8217A 8219A 8250A 8255A GTL 101x2 GTL 101x2 GTL 101x1 for GFG 8215A Instruction manualx1 Ac
22. the function generator with an external DC control Voltage It also provides an easy way for your adjustment 1 Select Function 8 first then select Range 7 rotate FREQ 13 to set required frequency range 2 Connect external control voltage 0 10V to the VCF 27 connector via a suitable lead and generate signal from Output 22 3 Other adjustments such as AMPL 12 switch can change amplitude of signal or get attenuation adjust Offset 17 for DC level rotate Duty switch can change output signal of pulse or ramp waveform etc 5 7 Auto Sweep 1 First select the required waveform by pressing Function 8 button then select required frequency range by pressing range Q push button 2 Connect output terminal 22 to oscilloscope for observing output signal 3 Rotate frequency 13 to determine the upper limit frequency 4 Pull out frequency 13 to perform auto sweep operation 5 Rotate SWEEP TIME 14 and SWEEP RATE 16 to adjust sweep time and rate 6 Pull out press LIN LOG 14 to obtain LOG LIN sweep mode Note The sweep width can only be adjusted during the sweep cycle and it can not be stopped 20 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL 5 8 AM FM operation 1 Select function 8 first then select Range 7 rotate FREQ 13 to set required frequency range 2 Connect output terminal 22 to oscilloscope for observing output signal 3 Press MOD 15 and pull out press MOD 16 to obtain FM AM modul
23. y To select the required frequency range by pressing the relevant push button on the panel as shown in Table 1 and Table 2 13 FUNCTION GENERATOR SERIES INSTRUCTION MANUAL Table 1 for GFG 8215A 8216A 8217A 8219A Push bottom 1 10 100 1k 10k 100k 1M Frequency Range 3Hz 0 3Hz 3Hz 30Hz 300 3kHz 30 2 300kHz 30Hz 300Hz 3kHz 30 2 300kHz 3MHz Table 2 for GFG 8250A 8255A Push bottom 1 10 100 Ik 10k 100k 1M Frequency Range 5Hz 0 5SHz 5Hz 50Hz 500Hz 5 gt 50 2 500kHz SOHz 500Hz 5 gt 50kHz 500kHz SMHz e Function Selector 9 Duty Function Press one of the three push buttons to select the desired output waveform Pull out and rotate the knob to adjust the duty cycle of the waveform 10 TTL CMOS Selector When push in the knob the BNC terminal of 20 will 11 DC Offset Control 12 Output Amplitude Control with Attenuation Operation output a TTL compatible waveform If pull out and rotate the knob can adjust the CMOS compatible output 5 15 Vpp from the output of BNC 20 Pull out the knob to select any DC level of the waveform between 10V turn clockwise to set a positive DC level waveform and invert for a negative DC level waveform Turn clockwise for MAX output and invert for 20dB output Pull the knob out for an additional 20dB output attenuation FUNCTION GENERA
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