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1. Calibration Procedure Line Voltage Conversion WARRANTY SERVICE INSTRUCTIONS ONE YEAR LIMITED WARRANTY PAGE INTRODUCTION The B amp K PRECISION Model 3010 Function Generator is a versatile signal source that can be used in a variety of engineering industrial educational and hobbyist applications The wide frequency range 1 Hz to 1 MHz for all functions sine square triangle and TTL output encompasses subaudible audio ultrasonic and RF applications The continuously variable DC offset control and provision for external VCO control further enhance the versatility of this instrument The human engineered case lends itself to bench use as well as easy portability GENERAL Basic Outputs Frequency Range External Frequency Control Maximum Input Input Impedance SPECIFICATIONS Square sine triangle DC and TTL Square Wave separate output jack 0 1 Hz to 1 MHz in six ranges VCO greater than 100 1 on any frequency range linear With FREQUENCY dial set at 1 a 0 to 5 5 V ramp input will produce a 100 1 fre quency change Frequency increases with positive voltage 20 V peak 1000 ohms nominal SPECIFICATIONS All specifications apply with dial scale between 1 and 10 Dial Accuracy Dial Range Output Impedance Output Amplitude Amplitude Control 5 of full scale to 500 kHz 8 of full scale
2. frequencies and when using the square wave and TTL outputs terminate the cable in 600 ohms to minimize ringing Keep the cables as short as possible B DCOUTPUT The DC OFFSET feature can be used to convert the Model 3010 to a bipolar DC power supply with an internal impedance of about 600 ohms Depress the FUNCTION switches slightly so that all switches are released all buttons out This removes all signal components from the output 2 The output now consists of a DC voltage which can be varied continuously from 10 volts to 10 volts open circuit by use of the DC OFFSET control C 10 decoupling capacitor 20 mfd or more can be connected across the 60092 OUTPUT and ground terminals to reduce the AC impedance of the output Always observe polarity when using polarized capacitors VOLTAGE CONTROLLED OPERATION The 3010 can be operated as a voltage controlled oscillator VCO by using an external control voltage applied to the VCO IN jack at the rear of the unit A male phono plug is provided for this purpose The externally applied voltage will vary the frequency which is preselected by the RANGE switches and the FREQUENCY dial A positive going voltage will increase the frequency and a negative going voltage will decrease the frequency Please note that the frequency does not change without limit as the input control voltage is increased The upper dial frequency can be exceeded by about 10 per cent If the control vol
3. from 500 kHz to 1 MHz includes dial scale accuracy and range to range accuracy Unit calibrated at full scale Greater than 100 1 6002 5 20 V p p open circuit 10 V p p into 600 Continuously variable greater than 30 dB range DC Offset Sine Wave Distortion Square Wave Non Symmetry Triangle Wave Non Linearity Square Wave Rise Fall Time Sine Wave Amplitude Flatness TTL Square Wave Response Short Term Stability Power Requirements Dimensions HWD Weight Handle Continuously variable 10 V open circuit 5 V into 60022 Max Vac Vpc offset without clipping 10 V open circuit 5 V into 60022 Less than 1 1 Hz to 100 kHz harmonics more than 30dB down from fundamental 100 KHz to 1 MHz Less than 1 to 100 KHz Less than 1 to 100 KHz Less than 100 nSEC at maximum output amplitude 3 dB to 1 MHz at maximum output amplitude Less than 25 nSEC rise fall time Fixed TTL level LO less than 4 V HI greater than 2 4 V Will drive 20 TTL loads 05 105 to 130 VAC 60 Hz 8 watts max 105 130 210 260 VAC 50 60 Hz export version available 3 2 x 11 3 x 7 7 8 13 x 28 70 x 19 56 cm 2 lbs 9 oz 1 16 Kg without line cord 2 Ibs 14 oz 1 31 Kg with line cord Four positions integral part of case 10 PANEL CONTROLS AND FEATURES See Fig 1 POWER on off switch Depressing this button turns the 3010 on To turn off push again and releas
4. full evaluation of the amplifier transient response The square wave because of the high harmonic content yields much information regarding amplifier performance when used in conjunction with an oscillo scope Use the test set up of Fig 9A This is similar to that used in Fig 5A except that a termination is specified at the amplifier input This is essential when using square waves to eliminate the ringing effects generated by the fast rise times 2 Using the triangle output of the 3010 set the AMPLITUDE control so that there is no signal clipping over the range of frequencies to be used Select the square wave output and adjust the frequency to several check points within the passband of the amplifier such as 20 Hz 1000 Hz and 10 KHz 4 At each frequency check point the wave form obtained at the amplifier output provides information regarding amplifier performance with respect to the frequency of the square wave input Fig 9B indicates the possible wave forms obtained at the amplifier output and the causes Square wave evaluation is not practical for narrow band amplifiers The restricted band width of the amplifier cannot reproduce all frequency components of the square wave in the proper phase and amplitude relation ships Dual Trace Square Wave selected e ue 1 i RES KP G00 1 Termination Output Load A TEST SET UP Frequency distortion amplitude re
5. pocket technique while handling an instrument probe Be particularly careful to avoid contacting a nearby metal object that could provide a good ground return path Always use an isolation transformer to power transformerless hot chassis equipment where one side of the ac power line is connected directly to the chassis This includes most re cent television sets and audio equipment Without an isolation transformer the chassis of such equipment may be floating at line voltage 120 VAC 60 Hz in USA depending upon which way the 2 wire ac power plug is inserted Not only does this present a dangerous shock hazard if the chassis is touched but damage to test instruments or the equipment under test may result from connecting the ground lead of some test instruments to a hot chassis The ground lead of this function generator and most other test instruments with 3 wire power plugs is at earth ground 5 On test instruments or any equipment with a 3 wire ac power plug use only a 3 wire outlet This is a safety feature to keep the housing or other exposed elements at earth ground 6 If possible familiarize yourself with the equipment being tested and the location of its high votage points However remember that high voltage may appear at unexpected points in defective equipment 7 Also remember that ac line voltage is present on some power input current points such as on off switches fuses power transformers etc even when the
6. the handle on the case Remove the handle The handle may be reversed if the user desires refer to Fig 17 2 Remove the two Phillips head screws from the rear case 3 Slide the rear case from the generator 4 To re install the rear case on the generator follow the above procedure in reverse When re installing the rear case be sure the printed circuit board properly engages the slots inside the case CALIBRATION PROCEDURE A Equipment Required Tektronix Model 465 Oscilloscope 2 Hewlett Packard Model 333A Distortion Analyzer 3 B amp K PRECISION Model 1820 Universal Frequency Counter 4 600 Terminating Resistor B Procedure Remove 3010 rear case Refer to Fig 17 2 Place the 3010 on an insulated surface Plug the line cord into the receptacle on the 3010 rear bracket then plug the other end into a 120 VAC outlet 3 Set up the 3010 controls as follows POWER 245 his gites ON RANGE 45 13 31 od 100 FUNCTION amp exa ens TRIANGLE DC OFFSET 21 E IER Centered AMPLITUDE Fully Counterclockwise FREQUENCY ios e 10 Refer to Fig 18 for trimpot location and Table for trimpot function 32 Fig 18 Trimpot location T mptNo Funeton 0000 1 KHz Symmetry 10 KHz Symmetry Square Wave Amplitude Sine Distortion 1 Sine Distortion 2 Sine Wave Amplitude Sine Wave DC Level 10 K Range Frequency 1 K amp 100 Range Frequency 10 amp 1 Range Frequency Table I Trimpot Functio
7. to the 15 volt supply minus the voltage at the emitter of Q6 divided by the total resistance Ro which equals R22 R23 The current 101 is produced by the same voltage but R24 has been switched in parallel to the sum of R22 R23 and the total resistance is now the parallel combination RT 9 R24 in parallel with the sum of R22 R23 The voltage across R21 is equal and opposite to the voltage across R20 IC4C and QS are connected as a voltage follower similar to IC3A and Q6 The voltage at the emitter of Q5 is equal to the voltage at the input to IC4C pin 10 The current produced is equal to the 15 volt supply minus the voltage at the emitter of Q5 divided by the total resistance Ry which equals R25 R26 The value of Ry is half the value of Ry therefore the current is 2I Similarly when the combination R27 R28 is switched in parallel to the combination R25 R26 the total resistance is Rr20 which equals R25 R26 in parallel with R27 R28 The total current with Ry yo is 20I Diode Gates D5 D6 The diode gates are silicon diodes DS and D6 In the 1 100 and 10K range the positive current source puts out 2I and the negative current source sinks I current The purpose of the gates is to either switch the output of the positive current source to the capacitors to charge them or to shunt the current so that the negative current source can discharge the capacitors The gates work as follows If the signal fr
8. two square waves coincide Amplitude Correlation and Sine Distortion Adjustments Terminate the 3010 60082 OUTPUT with 6002 and connect channel 1 scope probe to it Change the scope controls to the new settings as follows CH 1 VOLTS DIV 2V CH 1 COUPLING GND VERT MODE CH I TIME BASE 1 mS DIV LOCK HORIZ DISPLAY ritt Adjust CH 1 POSITION control to center the trace on the scope grid Flip CH 1 COUPLING to AC Push in the 3010 100 RANGE button and rotate the 3010 AMPLITUDE knob clockwise until the triangle wave just touches the 0 and 100 dotted lines on the scope grid Flip CH 1 COUPLING to DC Rotate the 3010 DC OFFSET knob until the triangle wave just touches the 0 to 100 dotted lines on the scope grid Push in the 3010 SQUARE FUNCTION button Flip CH I COUPLING to AC Adjust Trimpot R42 until the square wave just touches the 0 and 100 dotted lines on the scope grid Push in the 3010 SINE FUNCTION button Connect the distortion analyzer to the 3010 6009 OUTPUT Manipulate the distortion analyzer for minimum distortion reading Adjust Trimpot R50 first then Trimpot R55 for a minimum distortion reading Readjust both Trimpots R50 and R55 for a minimum distortion reading must be less than or equal to 0 5 Disconnect the distortion analyzer Adjust Trimpot R52 until the sine wave just touches the 0 and 100 dotted lines on the scope grid Flip CH 1 COUPLING to DC Adjust Trimpot R59 until the sine wave just to
9. 010 the signal can be injected either at the mixer 455 KHz or at the antenna 1 MHz When injecting the 455 KHz signal at the mixer input the local oscillator must be disabled 6 When the IF response is observed at the input to the AM detector an RF detector probe is required unless a demodulated point is specified by the manufacturer 7 The IF amplifier tuning adjustments can be performed as required to obtain the desired IF response curve Normally each tuned circuit is adjusted for maximum amplitude at the IF center frequency Dual Trace Oscilloscope preferred ARE AINE 0000000000 BAR Sine wave selected Frequency Counter VE re T RF Amp RF Detector Probe required at this point unless otherwise specified by the manufacturer Fig 11 AM receiver alignment RF and IF G USING THE 3010 AS A BIAS AND SIGNAL SOURCE In the test set up of Fig 12 the 3010 can be used to bias the transistor under test as well as to furnish an AC signal By observing the amplifier output on the oscilloscope the amplitude and bias of the transistor can be optimized for maximum undistorted output By use of the DC OFFSET control the effects of various types of bias class A B and C can be determined 20 Dual Trace Oscilloscope preferred Fig 12 Use of Model 3010 as a combined bias supply and signal source H PRESET FREQUENCY SELECTION In test and design work where several frequenci
10. 5 V The frequency of operation is determined by the currents the capacitor value and the peak to peak voltage of the triangle wave 25 soos L 111 C ES UP 42009 OTOE PPON 9T Bly 10 ZIDHU AS MD BI 195110 233 AG dumr iding ASL AGLA LANG Er ai AAC an EPI eum o auge 9D VEDI aono Kinn J UO Va apna SABAA auenbg RA doj4 di4 pue soeur pn 0 36 ENT using 17 782i 993 sayng iLL EO wu BECH CH LM FO O ZO WO 11 jddne samog FO aeo AUG ainoc pugna ED eal duty Burung yuan Y PM dua Gurung BPH augue abe yp JO LOS ASuonbau 26 f and T C Vpp ct B ge Gg therefore FOTO mee Thus for I 1 65 mA C 3 3 uF and Vpp 72 5 V 165 x 10 3 2 3 3 x 10 6 2 5 f 100 Hz DETAILED CIRCUIT DESCRIPTION A Frequency Control Voltage Reference IC4B The Frequency Control Voltage Reference is composed of three trimpots R11 12 13 two resistors and IC4B which divide the 415 volts supply and provide a reference voltage of approximately 12 volts to the Frequency Control Potentiometer Each trimpot is adjusted to compensate for the tolerance variations of the timing capacitors B Tuning Amplifier IC4A The tuning amplifier is provided to buffer the output of the Frequency Control Pot This assures that this voltage will be as linear as the frequency pot R101 itself If not R17 wo
11. 5 volt will produce a change in frequency equal to one per cent of the highest frequency obtainable on a given range For example if the 1 K RANGE is selected and the FREQUENCY dial is at 10 the output frequency is 10 KHz One per cent of 10 KHz is 100 Hz Therefore for each 055 volt change in the VCO voltage a 100 Hz change in frequency is produced with the 1 K RANGE selected regardless of FREQUENCY dial setting As an example assume the RANGE switch and FREQUENCY dial are set for 5 KHz output If an alternating signal having an amplitude of 55 volt is is applied to the VCO IN jack a frequency swing of 34 100 1 KHz is obtained The table below indicates the frequency change per 055 volt input to the VCO IN jack for each range 1 Frequency Change Hz For 055 V input D TTL OUTPUT This is a fast rise time square wave output available at the front panel Because of the fast transition times of this output cable termination should be provided to minimize ringing The output is always positive with respect to ground This signal can be used as an external sync pulse for oscilloscopes when using the other generator outputs It also can be used as a variable frequency signal source for exercising logic circuits Select desired frequency repetition rate 2 Connect to TTL output 3 The AMPLITUDE and DC OFFSET controls have no effect on the TTL output signal 12 APPLICATIONS A AMPLIFIER FREQUENCY RESPONSE S
12. 7 C AMPLIFIER OVERLOAD CHARACTERISTIC l The overload point for some amplifiers is difficult to determine exactly because of the gradual overload characteristic The exact point of which signal compression begins is difficult to determine using sine wave input The triangle wave form is ideal for this type of test because any departure from absolute linearity is readily detectable Using the test set up of Fig 5A and using the triangle output the peak overload condition for an amplifier can be readily determined This overload condition is shown in Fig 8 13 Select waveform Dual Trace as required n r No DC Offset Oscilloscope preferred AC Voltmeter x 6001 Termination Output Lead j A TEST SET UP sa SERE n Xn lim N MA AA M M Constant bee Feel eres Output Reference 70 of Reference or 3dB B WAVE SHAPE AND AMPLITUDE Fig 5 Amplifier frequency response manual frequency change 14 RELATIVE RESPONSE dB FREQUENCY Hz Fig 6 Plot of amplifier frequency response uii UU San Wi Pa RELATIVE RESPONSE dB FREQUENCY Hz Fig 7 Tone control effectiveness 15 D 16 TT 2 1 N ANT ZA LZ IN noi YY Waveform ere Output Waveform Fig 8 Amplifier overload characteristics AMPLIFIER PERFORMANCE EVALUATION USING SQUARE WAVES The standard sine wave frequency response curves such as those obtained in Par A do not give a
13. ATIONS RECEIVER ALIGNMENT The test set up of Fig 15 can be used for alignment of communication receiver IF s and discriminators using the 455 KHz IF frequency For accurate frequency adjustments a 455 KHz crystal control marker source should be used The sweep voltage source is applied to the 3010 VCO IN jack and to the oscilloscope X axis input 2 the IF response curve is indicated In some receivers the IF selectivity is packaged which means all adjustments are preset In this case the receiver alignment can only be evaluated and verified without adjustment Where the tuned circuits are adjustable the manufacturer s procedure must be followed to insure that the proper overall response is obtained ADDITIONAL APPLICATIONS The triangle output of the 3010 can be used at its lowest frequencies to simulate a slowly varying DC source This can be used to check threshold levels of TTL and CMOS logic as well as voltage comparators Chart recorders can be checked by this method Analog meter movements can be exercised from zero to fulk scale to observe defects such as sticky meter movements 23 Dual Trace X Y Dscillascope preferned To VCO INPUT Ma DC Gilis Direct or 10 1 Lcalitecopp Probe dig H A k stat ae 2nd IE V Audio i m U Wer Gates Ape RF Derector Probe raquinad at This pont unless otherwise specified by the manufacbunr FM Receiver Frequency KH
14. C and Qi comprise a 15 V regulator which is referenced to the 15 V via R1 and R2 In a similar manner IC3B and Q2 comprise a 5 V regulator which is referenced to the 5 V supply via R7 and R8 MAINTENANCE AND CALIBRATION WARNING The following instructions are for use by qualified personnel only To avoid electric shock de not perform servicing other than contained in the operating iristructions unless you are qualified to do so shock hazard is present when the case is removed once the line cord is plugged into an AC outlet Avoid touching the fuse or bottom of the circuit board in the area of the fuse or power transformer The fuse has 120 VAC 240 VAC on export models on it even when the POWER switch is off o Your B amp K PRECISION Model 3010 Function Generator was carefully checked and calibrated at the factory prior to shipment Calibration of this instrument should not be attempted unless you are experienced and qualified in the use of precision laboratory equipment Should any difficulty occur during repair or calibration refer to the warranty service instructions at the rear of this manual for information or technical assistance Fig 17 Removal of rear case 31 REMOV AL OF REAR CASE To remove the rear case from the generator proceed as follows Use a coin a quarter works best to remove the two screws that hold the handle to the case Use caution to avoid losing the springs beneath the screws that hold
15. INSTRUCTION MANUAL Ek PRECISION D KPRECISION EN NASGAN TEST INSTRUMENT SAFETY WARNING Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing must often be performed where exposed voltage is present An electrical shock causing 10 miliamps of current to pass through the heart will stop most human heartbeats Voltage as low as 35 volts dc or ac rms should be considered dangerous and hazardous since it can produce a lethal current under certain conditions Higher voltages pose an even greater threat because such voltage can more easily produce a lethal current Your normal work habitis should include all ac cepted practices that will prevent contact with exposed high voltage and that will steer current away from your heart is case of accidental contact with a high voltage You will significantly reduce the risk factor is you know and observe the following safety precautions Don t expose high voltage needlessly Remove housings and covers only when necessary Turn off equipment while making test connections in high voltage circuits Discharge high voltage capacitors after removing power 2 Usean insulated floor material or a large insulated floor mat to stand on and an insulated work surface on which to place equipment and make certain such surfaces are not damp or wet Where insulated floor surface is not available wear heavy gloves 3 Use the time proven one hand in the
16. d DC OFFSET voltage are available at this jack HANDLE Multiple position design permits use as a tilt stand or carrying handle FREQUENCY 10 ZA Q wee 2 pp CE pe xs E 1 26 MES 2 NO KER ZK A a Zeie Fig 1 Front panel controls and features 11 VCO INPUT jack rear panel An external voltage input will vary the output frequency The change in frequency is directly proportional to input voltage therefore the rate of change of frequency is proportional to that of the input voltage 12 LINE CORD RECEPTACLE rear panel This receptacle accepts the detachable line cord Fixed power cord on 105 130 210 260 VAC 50 60 Hz export version uH FG Ha Fig 2 Rear panel OPERATING INSTRUCTIONS FREQUENCY AND WAVEFORM SELECTION MANUAL OPERATION With the unit plugged into a power source depress the POWER button 1 2 Select the frequency range desired by depressing the appropriate RANGE switch The frequency range obtained as the FREQUENCY dial 6 is varied will be from one tenth the indicated RANGE value to 10 times this value For example select the 10 K range When the FREQUENCY dial is at 1 the output frequency is 1 KHz when at 1 it is 10 KHz and when at 10 the frequency is 100 KHz The frequency obtained applies to the signal at the TTL jack as well as the 60092 OUTPUT jack 3 Select the waveform desired by depressing the appropriate FUNCTION but
17. duction of low frequency component No phase shift Low frequency boost accentuated fundamental High frequency loss No phase shift Low frequency phase shift L High frequency loss and phase shift Low frequency loss and phase shift High frequency loss and low frequency phase Damped oscillation Low frequency phase shift trace thickened by hum voltage B TEST WAVEFORMS Fig 9 Amplifier performance evaluation using square waves 17 E SPEAKER SYSTEM TESTING The 3010 can be used to provide information regarding the input impedance of speaker systems vs frequency In addition the low frequency resonance of the system can be determined Because the Model 3010 output impedance is 600 ohms which is much higher than the impedance of conventional speaker systems the 3010 can be used as a variable frequency current source to evaluate the input impedance of the speaker system This is shown in Fig 10B l Use the test set up Fig 10A An oscilloscope could be used in this set up to verify that the 3010 is not being operated in a clipping condition Vary the frequency of the 3010 over the full range of interest and log the voltage measured at the speaker terminals vs frequency The dB scales of the AC voltmeter are convenient for converting this information to standard response units It will be observed that at some low frequency a pronounced increase in voltage
18. e RANGE selectors Decade frequency type Multiplying the range selected times the FREQUENCY dial 6 indication gives the output frequency which applies for all functions For example if the 100 K RANGE button is depressed and the FREQUENCY dial is at 10 the output frequency is 1 MHz FUNCTION selectors Select square uv sine VV or triangle w output waveform which appears at 60092 OUTPUT jack 9 AMPLITUDE control Controls the amplitude of the output signal which appears at 60022 jack 9 This control does not apply to the DC OFFSET voltage or to the TTL output DC OFFSET control Adds positive or negative DC component to the signal appearing at 600 OUTPUT jack 9 Continuously variable for 5 V 600 ohms or 10 V open circuit The DC component added by this control is dependent of the adjustment of AMPLITUDE control 4 FREQUENCY dial Multiplying the setting of this dial times the frequency of the RANGE switch 2 selected gives the output frequency of the waveforms at the 600 OUTPUT jack 9 and TTL jack 7 TTL jack A TTL square wave is available at this jack The frequency is determined by the RANGE selected and the setting of the FREQUENCY dial This output is independent of the AMPLITUDE and DC OFFSET controls L Ground jack Common reference for the TTL and 6002 OUTPUT signals 600 OUTPUT jack Waveforms selected by FUNCTION switches as well as the superimpose
19. e emitter junction of Q8 shifts the triangle waveform seen at the emitter of Q8 up to four diode drops about 2 6V so that the diode dates can switch properly with a TTL level signal from the level detector Dual Level Detector amp Flip Flop ICS The level detector senses the level of the ramp input either positive or negative and switches output states when the input reaches any one of two voltage limit references The device 75107 has a dual differential input comparator stage and a dual three input nand gate output stage connected as an RS flip flop The input limit voltage references are set by two voltage dividers on the tracking 15 V and 15 V supplies Resistors R32 and R33 set 1 25 V for the minus input of one comparator Resistors R34 and R35 set 1 25 V for the plus input of the other comparator C22 couples a small posi tive feedback from one output of the line receiver pins 5 amp 9 to the inputs pins 2 amp 12 to speed up the switching J TTL Buffer IC6B IC6C IC6B and 6C are half of a quad nand gate package They are connected in parallel and provide a fan out of 20 for the TTL square wave This avoids any loading on the level detector 29 K 30 Square Wave Level Shifter IC6A IC6D The square wave level shifter shifts the DC level of the TTL output of the level detector so that it is approximately symmetrical about zero IC 6A and 6D are connected in parallel One set of inputs pins 2 and 12 are
20. ee Fig 5 1 Interconnect equipment as indicated Fig SA This use of either the oscil loscope or the AC voltmeter to measure output voltage is adequate The advantage of the oscilloscope is that waveform distortion can be simultaneously monitored particularly if a power response curve is being run The AC voltmeter provided with decibel scales is convenient for converting the observed output variations into standard units of measure ment dB The amplifier under test may be anything from a single stage transistor amplifier to a high fidelity component type The dual trace oscilloscope is convenient for this application because the input to the amplifier as well as the output can be monitored simultaneously Vary the frequency of the 3010 as required maintaining a constant amplitude as observed on the oscilloscope The amplifier input and output waveforms can be monitored simultaneously as indicated in Fig 5b Using two centimeters for amplitude references provides a convenient method of determining percent of change in amplitude The results of response tests can be plotted on semi log paper as indicated in Fig 6 B TONE CONTROL TEST If the amplifier under test is provided with base and treble controls the effects of these controls on overall response can be determined by running consecutive response curves with the controls at both extremes of adjustment The results can be plotted on semi log graph paper as indicated in Fig
21. equipment is turned off 8 Never work alone Someone should be nearby to render aid if necessary Training on CPR cardo pulmonary resuscitation first aid is highly recommended INSTRUCTION MANUAL FOR MODEL 3010 FUNCTION GENERATOR DYNASCAN el RECISION CORPORATION is 6460 W Cortland Street Chicago Illinois 60635 TABLE OF CONTENTS INTRODUCTION urene dg SPECIFICATIONS 5 soe buo x oe Ro P Lan PANEL CONTROLS AND FEATURES OPERATING INSTRUCTIONS A Frequency and Waveform Selection Manual Operation B DC OUtDll ate tat tis ae net twee ees C Voltage Controlled Operation Di TIL Output 2eme ds RSV ERRAT DEAS APPLICATIONS A Amplifier Frequency Response B Tone Control Test Idus aAA Io eS C Amplifier Overload Characteristic D Amplifier Performance Evaluation Using Square Waves E Speaker System Testing F AM Receiver Alignment G Using the 3010 As A Bias and Signal Source H Preset Frequency Selection I Digital Frequency Selection J Communications Receiver Alignment K Additional Applications THEORY OF OPERATION General Circuit Description Detailed Circuit Description dius MAINTENANCE AND CALIBRATION Removal of Rear Case
22. es are used repeatedly it is convenient to be able to preselect these frequencies with a minimum of effort As shown in Fig 13 the VCO feature of the 3010 can be used together with preset voltages and frequency selector switch 1 Set the FREQUENCY DIAL to 1 2 Connect the output of the 3010 to a frequency counter 3 With the frequency selector switch in the F1 position adjust the RI for the desired frequency as observed on the frequency counter Repeat this for the frequencies desired 4 With the FREQUENCY dial set at 1 and a maximum available At voltage of about 6 volts frequencies encompassing a 100 1 range can be obtained by this method on each frequency range 21 22 Aa 4 regulated fo VOD in eta irnar peared Frenay i D TEEN L High Impedance DC oi replier Fig 13 Preset frequency selection I DIGITAL FREQUENCY SELECTION Frequencies can be switched electronically by using the set up shown in Fig 14 The preset voltages can be digitally selected and applied to the VCO IN jack on the Model 3010 Although provisions for two frequencies are shown additional frequencies can be added using redundant circuits This is convenient in frequency shift keying FSK systems To VDO In nap i NULL p r t 6V en Jj TE Dana Sat Frequency i sar re J TEM MID d Par TT ar OFF OE pul i OFF 10K cette E Fig 14 Digitally programmed frequency selection COMMUNIC
23. n 33 34 Symmetry Adjustments Refer to Fig 18 for location of Trimpots R26 and R28 Terminate the 3010 TTL OUTPUT with 600 2 and connect both channel I and channel 2 scope probes to it Set the scope controls as follows CH 1 VOLTS DIV 1V CH 1 COUPLING DC CH 2 VOLTS DIV 1 V CH 2 COUPLING DC CH 2 INVERT INVERT VERT MODE ALT A TIME BASE 1 mS DIV LOCK HORIZ DISPLAY KNOBS A TRIG MODE AUTO A COUPLING DC A SOURCE NORM Important A TRIGGER SCOPE B COUPLING DC B SOURCE STARTS AFTER DELAY Adjust CH 1 and CH 2 position controls to center each trace and adjust A TRIGGER level for a stable trigger The display should appear to be two squares in phase but since CH 2 is inverted and NORM source triggering is used what appears to be falling edge of CH 2 is actually the leading edge of the TTL OUTPUT Change HORIZ DISPLAY to A INTEN Use the B TIME DIV KNOB pull to unlock and the DELAY TIME POSITION CONTROL to center the intensified trace to the trailing edges of the square waves Continue until the B TIME DIV setting is 1 uS DIV Now change HORIZ DISPLAY TO B DLY D and the display should show an expanded view of the falling edges of the square waves Adjust Trimpot R26 so that the edges coincide Change the 3010 RANGE setting to 1 K and repeat the above procedure but change A TIME DIV to 10 uS DIV and B TIME DIV to 1 uS DIV and adjust Trimpot R28 so that the trailing edges of the
24. nd Street Chicago Illinois 60635 1981 e DYNASCAN CORP 480 225 9 001 C PRINTED IN U S A
25. nge fuse F1 see Fig 18 for location Use 4 A 3AG slow blow for 105 130 volt operation or We A 3AG slow blow for 210 260 volt opera tion 4 Change line voltage label 210 260 VAC 105 130 VAC Fig 19 Transformer wiring export version 36 WARRANTY SERVICE INSTRUCTIONS Refer to the MAINTENANCE section of your B amp K Precision instruction manual for adjustments that may be applicable 2 1f the above mentioned procedures do not correct the problem you are experiencing with your unit pack it securely preferably in the original carton or double packed Enclose a letter describing the problem and include your name and address Deliver to or ship PREPAID UPS preferred to the nearest B amp K Precision authorized service agency see list enclosed with unit If your list of authorized B amp K Precision service agencies has been misplaced contact your local distributor for the name of your nearest service agency or write to Service Department B amp K Precision Product Group DYNASCAN CORPORATION 2815 West Irving Park Road Chicago Illinois 60618 37 LIMITED ONE YEAR WARRANTY DYNASCAN CORPORATION warrants to the original purchaser that its B amp K PRECISION product and the component parts thereof will be free from defects in workmanship and materials for a period of one year from the date of purchase DYNASCAN will without charge repair or replace at its option defective product or componen
26. om the level detector is high level TTL 5 V it reverse biases diode D6 and cuts it off Diode D5 now becomes forward biased and all the current 2I flows through DS Since the negative current source can only sink I current a net positive current I is seen by the capacitors and they are linearly charged to produce a positive ramp If the signal from the level detector is low level TTL 0 V it forward biases diode D6 and the level detector sinks all the current 2I from the positive current source Diode DS now becomes reverse biased and no current flows thru it The capacitors now see only the negative current source with I current and are linearly discharged to produce a negative ramp In the 10 1K and 100K ranges the gates work exactly the same except that the currents are now 10 times greater G Cr C15 16 17 18 The timing capacitors Cy are chosen for such highly desirable qualities as Low dissipation factor Low temperature coefficient 3 Long term capacitance stability H Triangle Buffer Q7 Q8 The triangle buffer has a very high impedance to minimize leakage currents and prevent loading of the timing capacitors Q7 is a dual FET one half is the high impedance buffer to the capacitors while the other half provides temperature compensation to the first half Q8 is an emitter follower and is used to provide the necessary current to drive the level detector sine shaper etc The three silicon diodes along with the bas
27. switched so that the level shifter operates only when the square function button is pushed on Trimpot R42 provides an amplitude adjustment for the square wave Sine Wave Shaper IC7 The sine wave shaper takes a triangle wave input and non inearly shapes it to produce a sine wave The shaper utilizes the non linear relationship of a differential pair of transistors The output is taken from one collector of the pair and buffered and level shifted by the two other transistors in the package IC7 Trimpot R52 adjusts the amplitude of the sine wave and R59 adjusts its DC level at the output Trimpots R50 and R55 are adjusted to provide the lowest distortion of the sine wave Output Amplifier Q9 10 11 12 13 The Output Amplifier consists of a differential input stage Q9 and Q10 followed by a common emitter transistor Q11 The output from Q11 is applied to a push pull output stage Q12 and Q13 Feedback is applied from the output to the base of Q10 by R70 and R69 The closed loop gain is approximately 10 DC offset is obtained by applying the offset voltage to the base of Q10 also Power Supply IC1 IC2 IC3B IC3C Q1 Q2 01 2 3 4 Power transformer T1 bridges diodes D1 2 3 4 and filter capacitors C1 and C3 generate 22 V and 22 V unregulated The 22 V is applied to IC1 a 78L15A voltage regulator which generates the 15 V supply The 22 V is also applied through RS to IC2 a 78L054A regulator which generates the 5 V IC3
28. t parts upon delivery to an authorized B amp K PRECISION service contractor or the factory service department accompanied by proof of the date of purchase in the form of a sales receipt To obtain warranty coverage this product must be registered by completing and mailing the enclosed warranty registration card to DYNASCAN B amp K PRECISION 6460 West Cortland Street Chicago Illinois 60635 within fifteen 15 days from the date of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs It is void if the serial number is altered defaced or removed DYNASCAN shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific m and you may also have other rights which vary from state to state For your convenience we suggest you contact your B amp K PRECISION distributor who may be authorized to make repairs or can refer you to the nearest service contactor If warranty service cannot be obtained locally please send the unit to B amp K PRECISION Service Department 2815 West Irving Park Road Chicago Hlinois 60618 properly packaged to avoid damage in shipment 38 BIF pper DYNASCAN ST PRECISION CORPORATION 6460 W Cortla
29. tage reduces the lowest frequency available below the frequency corresponding to the low end of the frequency dial 1 erratic operation results The desired frequency output waveforms DC offset and the output amplitude adjustment are select d as for manual operation The maximum voltage controlled sweep is over a 100 1 range SWEEP FREQUENCY OPERATION a Select frequency range and function b Set DC offset if required c Setamplitude to desired level d To obtain maximum sweep set the FREQUENCY dial to either extreme For this example set at low end 1 on FREQUENCY dial e Connect a positive going voltage to the VCO IN jack A 0 to 5 5 volt ramp will provide a frequency increase corresponding to a FRE QUENCY dial setting of 10 This is a 100 1 ratio The frequency varies in direct proportion to the applied input voltage 2 FREQUENCY MODULATION If an alternating voltage with no DC component is applied to the VCO IN jack the preset frequency will vary above and below the frequency that was preset by the RANGE switch and FREQUENCY dial The DC component of such an input signal can be removed by transformer or capacitive coupling Select frequency and function Set DC offset if required Set amplitude to desired level Adjust the VCO IN voltage to provide the desired frequency modulation The approximate frequency deviation obtained for a given VCO signal can be determined as follows 1 2 05
30. ton The phase relationships of the waveforms available are shown in Fig 3 4 The amplitude of the selected output signal at the 60082 OUTPUT jack is adjusted by AMPLITUDE control 4 The TTL output is not affected by the AMPLITUDE control 5 A DC component can be added to the signal at the 600 2 OUTPUT jack by use of the DC OFFSET control The DC component introduced is independent of the AMPLITUDE control and does not apply to the TTL output The level of DC can be varied 10 volts open circuited or 5 volts across 600 ohms TRIANGLE SQUARE Fig 3 Output waveform and phase relationships A ZERO DC OFFSET WITH MAXIMUM OV SIGNAL 65V 5V KE B OFFSET LIMITS oj Huel 3 Aur WITHOUT CLIPPING 9N POSITIVE NEGATIVE DC OFFSET DC OFFSET 5V Se C EXCESSIVE OFFSET SE cid U POSITIVE NEGATIVE DC OFFSET DC OFFSET Fig 4 Use of DC OFFSET control 6 Remember that the output signal swing of the generator is limited to 10 volts open circuit or 5 volts into 600 ohms This applies to the combined signal and DC offset Clipping occurs slightly above these levels Fig 4 illustrates the various operating conditions encountered when using the DC offset If the desired output signal is large or if a large DC offset is used an oscilloscope should be used to make sure that the desired combination is obtained without undesirable clipping 7 When using the higher output
31. uches the 0 and 100 dotted lines on the scope grid Frequency Adjustments Connect the counter to the 3010 6008 OUTPUT Set the counter to PERIOD FUNCTION Push in the 3010 10 K RANGE button and be sure that the 3010 FREQUENCY dial is set to 10 Adjust Trimpot R13 for a counter reading of 10 000 uS OK if counter reading is between 9 980 uS and 10 020 uS Push in the 3010 100 RANGE button Adjust Trimpot R12 for a counter reading of 1000 00 uS OK if counter reading is between 998 000 uS and 1002 00 uS 35 Push in the 3010 10 RANGE button Adjust Trimpot R11 for a counter reading of 10 0000 mS OK if counter reading is between 9980 00 uS and 10 0200 mS 8 Disconnect the scope probe and counter from the 3010 600 OUTPUT Carefully re install the rear case refer to Fig 17 LINE VOLTAGE CONVERSION The 105 130 volt 60 Hz power transformer 065 137 9 001 used in the stand ard 3010 is replaced by a 105 130 210 260 volt 50 60 Hz power transformer 065 137 9 002 in the export version The line cord in the export version uses standard DIN color codes The power transformer is normally prewired to match the power source used in the country of original sale The instrument may be easily coverted to the alternate line voltage To convert from 210 260 volt operation to 105 130 volt operation or vice versa use the following pro cedure Remove case Fig 17 2 Rewire power tansformer for desired line voltage Fig 19 3 Cha
32. uld be in parallel with frequency pot R101 and the action of the frequency pot would be non linear C Current Summing Amplifier ICAD Q3 The current Summing Amplifier sums the current from the tuning amp and the VCO input The current from the tuning amp is simply the voltage at its output divided by the value of R17 2KQ The current from the VCO input is normally zero When a voltage is applied the current into the summer is the voltage divided by R18 1KQ For a 100 1 sweep the voltage has to be approximately 5 5V The output current collector of Q3 creates a voltage across R19 1K that tracks the voltage of the tuning amplifier by a factor of M D Current Source Driver IC3D Q4 IC3D is an operational amplifier and Q4 is an emitter follower used in 21 28 conjunction with the operational amplifier IC3D and Q4 are connected as a voltage follower with a closed loop gain of 1 The voltage of the emitter of Q4 follows the input voltage of pin 12 The voltage at the collector of Q4 tracks the voltage at the emitter but is of opposite polarity In this way the current source driver provides both current sources with equal voltages Positive amp Negative Current Sources IC3A IC4C Q5 Q6 The current sources provide two switchable sets of currents IC3A and Q6 are connected as a voltage follower The voltage at the emitter of Q6 is equal to the voltage at the input to IC3A pin 3 The current produced I is equal
33. will occur This is the resonance frequency of the low frequency driver in the speaker system This test set up is convenient when designing speaker enclosures It can help the designer to determine the effect on system resonance of varying port sizes damping materials and other basic enclosure factors The measurements obtained in the above tests can be plotted on semi log graph paper as indicated in Fig 10C F AM RECEIVER ALIGNMENT l Use the test set up of Fig 11 Because of the linear relationship between sweep voltage and frequency of the Model 3010 a linear frequency presentation is obtained on the oscilloscope regardless of whether the sweep voltage is a triangle sine wave or a ramp To minimize the number of set up adjustments required the sweep voltage to the VCO IN jack of the 3010 should not have a DC component This can be removed by capacitor coupling If a precise center frequency is required a frequency counter should be used when setting the output frequency of the 3010 This is done without sweep voltage input The sweep voltage to the oscilloscope can be supplied either to an external horizontal input jack or if the oscilloscope has front panel X Y capability it can be applied to one of the two vertical input jacks RELATIVE RESPONSE d FREQUENCY Hz B GRAPH OF RESULTS Fig 10 Speaker system tests Speaker System E ES UT 5 Because of the wide frequency range of the 3
34. z Fig 15 Alignment of communications IF s and discriminators 24 THEORY OF OPERATION GENERAL CIRCUIT DESCRIPTION See Block Diagram and Schematic The basic waveform generated in the Model 3010 is the triangle wave This is accomplished by charging and then discharging a capacitor by equal magnitude currents dual comparator and flip flop determine whether the capacitor is being charged or discharged When the voltage on the capacitor reaches the positive limit the charging current is switched off and the capacitor discharges until the lower limit is reached at which time the charging current is then reapplied The output of the dual comparator is a square wave To produce a sine wave the triangle wave is shaped by a special amplifier Range switching is accomplished by changing the magnitude of the current sources and the timing capacitor Dial frequency tuning is done by changing the magnitude of the current sources A frequency change of over a 100 1 is possible with the frequency dial Below is a table of the capacitors and currents used RANGE 100 1 CAPACITOR CURRENT 1H 10Hz 3 3 uF C15 1 65 uA 165 uA 1 Hz 100 Hz 3 3 uF C15 16 5 uA 1 65 mA 10Hz 1KHz 033 uF C16 1 65 uA 165 uA 100 Hz 10KHz 033 uF C16 16 5 uA 1 65 mA 1 KHz 100 KHz 325 pF C17 18 1 65 pA 165 uA 10 KHz 1 MHz 300 pF C18 16 5 uA 1 65 mA The peak to peak voltage of the triangle wave generated is 2

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