Dynascan B&K PRECISION 3010 Manuel utilisateur
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TEST INSTRUMENT SAFETY
WARNING
Normal useof testequipmentexposesyouto a certainamount of dangerfrom electricalshock
becausetesting must often be performed where exposedvoltage is present. An electrical shock
causing 10miliamps of currentto passthrough theheartwill stopmosthumanheartbeats.Voltage
aslow as35volts dc or ac rmsshouldbeconsidereddangerousandhazardoussinceit canproduce
alethal current undercertainconditions. Highervoltagesposeanevengreaterthreatbecausesuch
voltage canmore easilyproducea lethalcurrent. Your normal work habitisshould include all ac-
cepted practices that will preventcontact with exposedhigh voltage. and that will steercurrent
away from your heart is caseof accidental contact with a high voltage. You will significantly
reduce the risk factor is you know and observethe following safetyprecautions:
Don't exposehigh voltage needlessly.Removehousingsand covers only whennecessary.
Turn off equipment while making testconnectionsin high-voltagecircuits. Dischargehigh-
voltage capacitors after removing power.
2.
Usean insulated floor material or a large,insulated floor mat to stand on, and aninsulated
work surface on which to placeequipment; and makecertain-suchsurfacesare not damp or
wet. Whereinsulated floor surfaceis not available, wear heavygloves.
3. Use the time-proven "one hand in the pocket" technique while handling an instrument
probe. Be particularly careful to avoid contacting a nearbymetal object thatcould providea
good ground return path.
Always use an isolation transformer to power transformerless "hot chassis" equipment,
whereone sideof the ac powerline isconnecteddirectly to thechassis.This includesmostre-
cent television setsand audio equipment. Without an isolation transformer, the chassisof
suchequipment maybe floating at line voltage (120VAC, 60 Hz in USA), dependingupon
which way the2-wireac power plugis inserted. Not only doesthis presentadangerousshock
hazard if the chassisis touched, but damageto test instrumentsor the equipmentunder test
may result from connectingtheground lead of sometestinstrumentsto a "hot" chassis.The
ground lead of this function generatorand most other test instruments with 3-wire power
plugs is at earthground.
S. On testinstruments or any equipmentwith a 3-wireac power plug, useonly a 3-wireoutlet.
This isa safety feature to keepthe housing or other exposedelementsat earthground.
6. If possible,familiarize yourself with the equipmentbeingtestedand the location of its high
votage points. However, rememberthat high voltage may appear at unexpectedpoints in
defectiveequipment.
7.
Also rememberthat acline voltage ispresentonsomepower input current points suchason.
off switches,fuses,power transformers, etc., evenwhen the equipmentis turned off.
8. Never work alone. Someoneshould be nearbyto renderaid if necessary.Training on CPR
(cardo-pulmonary resuscitation)first aid is highly recommended.
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FOR
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TABLE OFCONTENTS
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INTRODUCTIONSPECIFICATIONS.PANEL CONTROLS AND FEATURES.OPERATING INSTRUCTIONS
A. Frequency and Waveform Selection, Manual Operation
B. DC Output.C. Voltage-Controlled Operation.D.TTLOutputAPPliCATIONS
A. Amplifier Frequency Response.B. Tone Control Test..C. Amplifier Overload Characteristic.D. Amplifier Performance Evaluation Using Square Waves
E.SpeakerSystemTestingF.AMReceiverAlignmentG. Using the 3010 As A Bias and Signal Source.H. Preset Frequency Selection.I. Digital Frequency Selection.J. Communications Receiver Alignment.K.AdditionalApplicationsTHEORY OF OPERATION
GeneralCircuitDescriptionDetailed Circuit Description.MAINTENANCE AND CALIBRATION
Removal of Rear CaseCalibration ProcedureLineVoltageConversionWARRANTY SERVICE INSTRUCTIONS.ONE-YEAR liMITED WARRANTY.
'-
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INTRODUCTION
The B& K-PRECISIONModel 3010 Function Generatoris a versatilesignal
sourcethat can be used in a variety of engineering,industrial,educationaland
hobbyistapplications.Thewide frequencyrange(.1 Hzto 1 MHz)forallfunctions
(sine,square,triangleand TTL output) encompassessubaudible,audio,ultrasonic
andRF applications.ThecontinuouslyvariableDCoffsetcontrolandprovisionfor
external VCO control further enhancethe versatility of this instrument. The
human-engineeredcaselendsitselfto benchuseaswellaseasyportability.
SPECIFICAnONS
GENERAL
Square, sine, triangle, DC and TTL Square Wave
(separateoutputjack).
BasicOutputs
FrequencyRange OJ Hz to 1 MHz in six ranges.
ExternalFrequency
Control 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.
:!:20V peak.
MaximumInput
Input Impedance 1000ohms,nominal.
SPECIFICAnONS (AU specifications apply with dial scalebetween1 and 10)
Dial Accuracy 5% of full scale to 500 kHz, 8% of full scale from
500 kHz to 1 MHz (includes dial scale accuracy and
range-to-rangeaccuracy). Unit calibrated at full scale.
Dial Range Greater than 100: 1,
600.Q,:1:5%.
OutputImpedance
OutputAmplitude 20 V popopencircuit;
10 V popinto 600il.
AmplitudeControl Continuouslyvariable,greaterthan 30dBrange.
3
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DCOffset Continuously variable, :tIO V, open circuit; :tS V,
into 600Q.
Max.
VAC + Voc offset without clipping, :1:10V
opencircuit; :1:5V into 600il.
SineWave
Distortion Lessthan 1%,1 Hz to 100 kHz; hannonicsmore
than 30dB down from fundamental,100KHz to
1MHz.
Lessthan1%,to 100KHz.
SquareWave
Non-Symmetry
TriangleWave
Non-linearity Lessthan 1%,to 100KHz.
SquareWave
Rise/FallTime less than 100nSECat maximumoutput amplitude.
SineWaveAmplitude
flatness :1:.3dB to 1 MHz at maximum output amplitude.
TTL SquareWave
Response Lessthan 25nSECrise/fall time. Fixed TTL level:
LO lessthan .4V; III greaterthan 2.4V. Will drive
20TTL loads.
Short-Term
Stability .05%
PowerRequirements
Dimensions(HWD)
105to 130VAC, 60 Hz. 8 wattsmax.
(105-130/210-260VAC, 50/60 Hz export version
available) "
3.2 x 11.3x 7.7
(8.13x28.70x 19.56cm.)
Weight 21bs.,9oz.(1.16Kg.)withoutlinecord.
21bs.,14oz.(1.31 Kg.)withline cord.
Handle Fourpositions:integralpartof case.
4
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PANELCONTROLSAND FEATURES
(SeeFig. 1)
1. POWERon-off switch.Depressingthis button turnsthe 3010on.To turn off,
pushagainandrelease.
2.
RANGEselectors.Decadefrequencytype.Multiplyingtherangeselectedtimes
the FREQUENCYdial (6) indicationgivesthe outputfrequency,whichapplies
for all functions. For example,if the 100K RANGEbutton is depressedand
theFREQUENCYdialis at 10,the output frequencyis1MHz.
3.
FUNCTION selectors.Selectsquare(IUU), sine("",,), or triangle ("""")
output waveformwhichappearsat 600n OUTPUTjack(9).
4.
AMPliTUDE control. Controls the amplitude of the output signal,which
appearsat 600n jack (9). This control doesnot applyto the DC OFFSET
voltageorto the TTL output.
S. DC OFFSETcontrol. Adds positiveor negativeDC componentto the signal
appearing at 600n OUTPUT jack (9). Continuouslyvariable for :!:SV
(600 ohms)or :!:10V (opencircuit). TheDCcomponentaddedbythis control
is dependentof the adjustmentof AMPLITUDEcontrol(4).
6.
FREQUENCYdial. Multiplying the settingof this dial timesthefrequencyof
theRANGEswitch(2)selectedgivesthe output frequencyof thewaveformsat
the 600n OUTPUTjack(9)andTTLjack(7).
7. TI'L jack. A TI'L squarewaveis availableat this jack. The frequencyis
determinedby the RANGEselectedandthesettingof theFREQUENCYdial.
Thisoutputis independentof theAMPliTUDE andDCOFFSETcontrols.
8. -=b(Ground)jack. Commonreferenceforthe 1TL and600n OUTPUTsignals.
9. 600Q OUTPUTjack. Waveformsselectedby FUNCTIONswitchesaswell as
thesuperimposedDCOFFSETvoltageareavailableatthisjack.
10. HANDLE. Multiple-position designpermits use as a tilt stand or carrying
handle.
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11. VCOINPUTjack(rearpanel).An externalvoltageinput will varythe output
frequency.The changein frequencyis directlyproportionalto input voltage;
therefore,the rateof changeof frequencyis proportionalto that of theinput
voltage.
12. LINE CORD RECEPTACLE (rear panel). This receptacleacceptsthe
detachableline cord. (Fixed powercord on 105-130/210-260VAC, 50/60
Hz export version.)
11 12
Fig.2. Rearpanel.
7
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OPERATINGINSTRucnONS
A.
FREQUENCYAND WAVEFORMSELECTION,MANUALOPERAnON
Withtheunitpluggedinto apowersource,depressthePOWERbutton(1).
2. Selectthe frequencyrangedesiredby depressingtheappropriateRANGE
switch. The frequencyrangeobtained as the FREQUENCYdial (6) is
variedwill be from one-tenththeindicatedRANGEvalueto 10timesthis
value. For example,selectthe 10K range.WhentheFREQUENCYdialis
at .1,the output frequencyis 1 KHz; whenat 1,it is 10KHz andwhenat
10the frequencyis 100KHz.Thefrequencyobtainedappliesto thesignal
atthe lTL jackaswellasthe60012OUTPUTjack.
3. Select the waveform desired by depressingthe appropriate FUNCTION
button. The phase relationships of the waveforms available are shown in
Fig. 3.
4. The amplitude of the selected output signal at the 6001"2OUTPUT jack is
adjusted by AMPLITUDE control (4). The TTL output is not affected by
the AMPLITUDE control.
5, A DC component canbeaddedto the signal at the 600n 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 bevaried :tIO volts opencircuited or :tS volts
across600 ohms.
Fig. 3. Output waveform and phaserelationships.
8
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