USER`S MANUAL - RP Electronics
Contents
1. Insert a small screwdriver in fuse holder slot located between fuse holder and receptacle and pry the fuse holder away from receptacle 3 When re installing the fuse holder make sure the fuse is installed so that the correct line voltage is selected 13 MAINTENANCE LIMITED WARRANTY Circuit Test Electronics warrants to the original purchaser that this product be free of defect in material or workmanship for a period of 2 years from the date of purchase Any product which has been subjected to misuse or accidental damage is excluded from the warranty Except as stated above Circuit Test Electronics makes no promises or warranties either expressed or implied including warranties of merchantability or the fitness for any particular purpose M SWF 8020 03914 142. of the SWF 8020 to the CH1 INPUT BNC of the oscilloscope Adjust the oscilloscope for best view of the waveform 4 Connect the SYNC OUTPUT BNC 5 to the CH2 INPUT BNC of the oscilloscope and set the TRIG source of the oscilloscope at CH2 position 5 the FREQUENCY knob 6 of SWF 8020 from 0 05 to 3 0 positions and check the waveform displayed on the oscilloscope The frequency will vary slowly on each step OPERATING INSTRUCTIONS 6 Turn the RANGE knob 7 clock wise from 10 to 1M The frequency will increase 10 times on each step If turning the knob counter clock wise from 1M to 10 the frequency will reduce 10 times on each step 7 Turn the FUNCTION knob 8 to change the waveform generated by SWF 8020 and displayed on oscilloscope CH1 will display the waveform as indicated by the FUNCTION knob 8 of SWF 8020 However CH2 will always display a TTL square wave only but the frequency of will synchronously change as CH1 changes 8 Turn the AMPL knob 9 The amplitude of CH1 on the oscilloscope will change but CH2 will not Pull out the knob the amplitude of CH1 will be reduced 10 times but CH2 will remain unchanged 9 Turn the OFFSET knob 10 the display on the oscilloscope will be unchanged Pull out the knob The display of CH1 on the oscilloscope will now be affected by the DC offset voltage as controlled from 10V to 10V by turning the knob The CH2 display will be unaffected Note that the CH1 display may b
3. Pull ON and turn to adjust the DC offset voltage 8 SWEEP RATE Turn this knob to adjust the sweep rate from 5sec to 10ms the sweep output is BNC 4 If this knob is pulled out then the main output 5 and sweep output 4 are synchronous 9 SWEEP WIDTH Turn this knob to adjust the sweep width Push in for a linear sweep pull out for a log sweep Knob 8 must be pulled out or this control is disabled 10 FUNCTION WAVE SELECTOR Turn this to select the output waveform 11 FREQUENCY RANGE Main adjustment of the frequency The output frequency will be 10 times on each step changed The frequency of the output signal is the product of the scale indicated by 2 and 11 OPERATING INSTRUCTIONS AN WARNING Before applying power to SWF 8020 make sure correct input voltage has been selected A caution All the knobs on the SWF 8020 are set at push position unless specially marked pull A FUNCTION GENERATOR i O CIRCUIT TEST RANGE FUNCTION SWF 8020 n AL L OFFSET AMPL SIENA BL PULL ADJ PULL 20d8 FREQUENCY lt PULL PULL LOG SWEEP SWEEP ON 7 SINO SER RT o 01 0 05 a POWER Ue 1 Check that the AC line voltage selector plug on the rear panel of SWF 8020 is in the correct position for the AC line voltage 2 Switch on the power switch and make sure that the power pilot LED is lit 3 Connect the OUTPUT BNC 4
4. knob to adjust the amplitude of the output pulse Or PULL out this knob to attenuate the output signal to 1 10 but the CH2 SYNC OUTPUT will not be affected 8 PULLOUT the OFFSET 9 knob and turn to adjust the DC offset voltage if neces sary CH2 will not be affected by this 9 Setthe FUNCTION 5 selector to negative pulse and operate as steps 5 6 7 and 8 as above 12 MAINTENANCE GENERAL MAINTENANCE Clean and recalibrate the instrumenton aregular basis to keep the instrument working well Never place heavy objects on the instrument Never place a hot soldering iron on or near the instrument Never insert wires pins or other metal objects into the ventilation fan Do not obstruct the ventilation holes in the rear panel as this will increase the internal temperature Never move or pull the instrument with the power cord or a probe cord Never move instrument when the power cord or a signal probe is connected to a circuit Remove any dirt dust and grime whenever they become noticeable Dirt on the outside covers can be removed with a soft cloth moistened with a mild cleaning solution FUSE REPLACEMENT If the fuse blows the ON indicator will not light and the instrument will not operate Replace only with the correct value fuse The fuse is located on the rear panel adjacent to the power cord receptacle Remove the fuse holder assembly as follows 1 Unplugthe AC power cord from rear of instrument 2
5. 1 KHz lt 2 Output Waveform Linear or Log Sweep Ramp Wave Output Amplitude 10Vp p No load or 5Vp p 1KQ load Output Frequency 0 2Hz 100Hz continuous adjustment 12 SWEEP GENERATOR Sweep Form Linear or Log switchable Sweep Speed 5sec 10ms continuous adjustment Sweep Width 1 1 1 100 FRONT PANEL DESCRIPTION RANGE FUNCTION 1K 10 a CIRCUIT TEST SWF 8020 400K Cty Ly FREQUENCY 20 1 oN PULL ADJ PULL 20dB 30 0 05 POWER 2 1 POWER SWITCH When pushed ON the switch will light the power pilot LED above the switch 2 FREQUENCY Fine adjustment for the frequency The frequency will be the product of the scale indicated by 2 and 11 3 SYNC OUTPUT Synchronous Output A TTL level Square wave output with same frequency as the Main output BNC 4 SWEEP OUTPUT Sweep signal output BNC It will operate independently whether the SWEEP is ON or OFF the BNC will output the sweep ramp wave The frequency is controlled by sweep rate 8 5 MAIN OUTPUT Function wave output BNC Output impedance is 500 maximum amplitude is 20Vp p for no load and 10Vp p for 500 load 6 AMPLITUDE Turn the knob to adjust the output signal amplitude Pull out the knob to attenuate the output 10 times This affects the Main output 5 signal only 7 DC OFFSET The knob controls the bias circuit it is set at OFF position in normal use
6. 5Hz 2 5MHz 80 rise wave to 20 fall wave lt 5 1Hz 100 KHz lt 2 1Hz 100 KHz 0 5Hz 3MHz 50 rise wave to 50 fall wave lt 2 1Hz 100 KHz lt 1 1Hz 100 KHz SPECIFICATIONS 4 SINE WAVE Frequency Distortion Harmonic Ratio Frequency Response 5 SQUARE WAVE Frequency Symmetry Rise Time 6 POSITIVE PULSE Frequency Width Symmetry Rise Time 7 NEGATIVE PULSE Frequency Width Symmetry Fall Time 8 MAIN OUTPUT Output Impedance Max Output Min output Attenuator 0 5Hz 2 lt 2 1Hz 100 KHz lt 309 100 KHz 3MHz lt 0 1dB up to 100 KHz lt 1dB 100KHz to 3MHz 0 5Hz 3MHz 50 positive half to 50 negative half lt 2 1Hz 100 KHz lt 60ns 0 5Hz 2 5MHz 0 4sec 100ns continuous adjustment 20 to 80 lt 5 1Hz 100 KHz lt 60ns 0 5Hz 2 5MHz 0 4sec 100ns 80 to 20 lt 5 1Hz 100 KHz lt 60 5 500 lt 2 20Vp p No load 1Vp p 10Vp p 500 load 0 5Vp p 0 1Vp p No load and 0 05V 500 load One 20dB lt 2 Accuracy 6 SPECIFICATIONS 9 SYNCHRONOUS OUTPUT Output Impedance 500 lt 2 Accuracy Output Level TTL level gt 3Vp p fixed amplitude Fan out gt 20 Rise Time lt 30ns 10 VCF INPUT Input Impedance 0 10V Input Frequency DC 1 KHz Input Frequency Variance 1 1 to 1 1000 11 SWEEP SYNCHRONOUS OUTPUT Output Impedance
7. USER S MANUAL Sweep Function Generator SWF 8020 CIRCUIT TEST ELECTRONICS www circuittest com TABLE OF CONTENTS SAFETY INFORMATION iscrizioni page 3 INTRODUCTION scanio iii 4 SPECIFICATIONS supina 5 FRONT FANFEDESCHIPION 8 OPERATING INSTRUCTIONS pini ini 9 MAINTENANCE sapinea piiat aia iae 13 SAFETY INFORMATION Caution and proper guidelines must be followed for personal and product safety Read this instruction manual carefully before using the instrument CAUTION This instrument can operate on 115VAC or 230VAC Before connecting the AC power plug to an AC line outlet be sure to check that the voltage selector plug is set in the correct position corresponding to the line voltage The instrument may not operate properly or may get damaged if it is connected to incorrect AC line voltage Whenever line voltage is changed fuse must be replaced with appropriate correct value SELECTOR LINE VOLTAGE FUSE 115V 100 125V 50 60Hz 600mA 230V 220 240 50 60Hz 300mA This instrument has been designed for indoor use only Operating temperature of this instrument is 10 C to 40 C 50 F to 104 F Operation outside of this temperature range may cause damage to the circuits Do not use this instrument in a place where strong magnetic or electric fields exist Such fields may adversely affect the measurements If the instrument is used in a manner not specified by the manufacturer then
8. e cut off if the DC offset voltage is too high 10 OPERATING INSTRUCTIONS B SWEEP GENERATOR DUI Aa WD 100K A AMPL wt CA SUE CIRCUIT TEST i ra ie i iC PULL ADJ PULL 20dB FREQUENCY i ZY N 3 0 OUTPUT ter TTL 19 Switch on the SWF 8020 and connect it to the oscilloscope Main output 3 to CHI Connect the SWEEP output 4 BNC to CH2 Set the RANGE 5 of SWF 8020 at 100K position Set the FREQUENCY 6 of SWF 8020 at 1 0 position Set the FUNCTION 7 of SWF 8020 at sine wave Turn the SWEEP RATE 8 knob the display of CH1 will remain unchanged Only the display of CH2 will be affected Since knob 8 is pushed in the sweep output will operate independently Pull out knob 8 to set SWF 8020 SWEEP ON and turn the knob to set the sweep rate from 5sec to 10ms Both CH1 and CH2 displays will be affected NOTE After PULL SWEEP ON the trigger source of the oscilloscope must be changed to CH1 Turn the SWEEP WIDTH 9 adjustthe sweep width according to the display of CH1 on the oscilloscope to set the sweep width and sweep rate Set the FREQUENCY knob 6 at 0 05 to have the maximum sweep width gt 100 times Itis most commonly used when doing audio or circuit bandwidth testing Pull out knob 9 the sweep mode will be changed from linear sweep to Log sweep The waveform d
9. er basic electronic circuit applications Sweep Generator SWF 8020 provides linear sweep or log sweep selection switch to select the sweep mode Maximum sweep width is 1 100 and sweep speed is from 5sec to 10ms It also provides single sweep or synchro sweep output function Excellent Heat Dissipation This function generator is based on the continuous charge discharge of a capacitor to produce the output waveform Any change on the capacitor value will cause a different frequency to be generated Temperature rises within the instrument will also change the capacitance Thus keeping the inner temperature constant becomes a very important factor on the stability of the frequency generated SPECIFICATIONS 1 GENERAL SPECIFICATIONS Frequency Output Waveform Stability DC Offset Power source Power Consumption Operating Temperature Storage Temperature Dimensions Weight Accessories 2 RAMP WAVE Frequency Symmetry Rise Wave Linearity 3 TRIANGLE WAVE Frequency Symmetry Linearity 0 5Hz 3MHz in 6 steps Sine Square Triangle Ramp Positive Pulse and Negative Pulse 0 1 15minutes after power on 0 2 24hrs after power on Continuous Adjustment 10V at no load or 5V at 500 load AC 115V 10 50 60HZ FUSE 600mA 230 10 50 60HZ FUSE 300mA 25W 0 C 40 C 10 80 R H 20 C 70 C 0 90 R H 275 x 90 x 300 mm 2 5Kg Net Power cord Instruction Manual 0
10. isplayed on CH1 will be log form SYNC OUTPUT 10 The BNC will synchronously output a TTL signal to use as a signal source for an oscilloscope or counter etc 10 AMPL 11 Turn this knob to adjust the amplitude of the signal from the Main output 11 OFFSET KNOB 12 This sets the DC offset voltage of the signal from the Main output This knob will operate only at the PULL position Tia OPERATING INSTRUCTIONS C PULSE GENERATOR 8 CIRCUIT TEST es Pa A OFFSET AMPL i IN FREQUENCY A a LJ Md DI PULL PULL LOG SWEEP SWEEP ON ON 1 D lt SYNC OUTPUT SWEEP OUTPUT OUTPUT PULL ADJ PULL 20dB 1 0 08 TTL Switch ON the power switch 1 and make sure the pilot LED has been lit Connect the output BNC 3 to CH1 input of the oscilloscope Connect the SYNC OUT 4 BNC to CH2 input of the oscilloscope Set the FUNCTION 5 selector at positive pulse position Set the RANGE 6 at the desired frequency In this example set at 100K position Setthe FREQUENCY 7 atthe desired frequency The frequency willbe the product of the settings indicated by 6 and 7 In this example set 7 at 1 0 position 1 a VIN Example The frequency 100K x 1 0 100 KHz The pulse width 1 frequency x 15 1 100 KHz x 15 1 5 8 The pulse output from SYNC OUTPUT TO CH2 will be the same 1 5uS width TTL pulse 7 Adjust the AMPL 8
11. protection mechanisms built into the instrument may not function properly WARNING The following precautions must be observed to help prevent electric shock 1 Whenthe instrument is used to make measurements where high voltages are pres ent there is always a certain amount of danger from electrical shock The person using the instrument in such condition should be a qualified electronics technician or otherwise trained and qualified to work in such circumstances 2 The ground wire of the 3 wire AC power plug places the chassis and housing of the instrument at earth ground Use only a 3 wire outlet and do not attempt to defeat the ground wire connection or float the instrument since doing so may pose a great safety hazard 3 Never apply external voltage to the output BNC of the instrument 4 Excessive voltage applied to the input BNC may damage the instrument 5 Do not operate the instrument with the cover removed unless by a qualified service technician INTRODUCTION DESCRIPTION The SWF 8020 is a multi purpose highly reliable 3 MHz sweep function generator Rug ged and easy to use with many convenient features ideal for the hobbyist educational manufacturing or R amp D laboratories FEATURES Function Generator Unlike conventional function generators the SWF 8020 provides 6 waveforms Pulse Generator Adjustable pulse width from 100ns to 0 4s make the SWF 8020 an ideal instrument for Audio Video and oth
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