B+K precision 4051 Manuale utente

OperatingManual

B+KPRECISION4051

Multi-FunctionGenerator

99 Washington Street

Melrose, MA 02176

Fax 781-665-0780

TestEquipmentDepot.com

Page1

BKPRECISIONMODEL4051

OperatingManual

TableofContents

Warranty:InsideFrontCover

SectionOne:GENERALINFORMATION

  



1.1

-

INTRODUCTION

1.2-FEATURES

1.3-UNPACKINGANDINSPECTION

1.4-INSTRUMENTIDENTIFICATION

1.5-INSTRUMENTPOWERANDCARE

SectionTwo:FUNCTIONS

2.1-INTRODUCTION

2.2-FUNCTIONKEYSWITCH

2.2.1-“CAL”KEY

2.2.2-“SOURCE”KEY

2.2.3-“SWEEP”KEY

2.2.4-“BURST”KEY

2.2.5-“MOD”KEY

2.2.6-“SET”KEY

2.2.7-“RNGUP”KEY

2.2.8-“RNGDN”KEY

2.2.9-“WAVEFORM”KEY

2.2.10-“SYM”KEY

2.2.11-“OFFSET”KEY

2.2.12-“LOGIC”KEY

2.2.13-“ADJUST”KEY

2.2.14-“FUNCTION”KEY

2.3-CONTROLKNOB

2.3.1-DIGITALENCODER

2.3.2-AMPLITUDEPOT

2.4-BNCOUTPUTANDINPUTJACK

2.4.1-50OHMOUTPUT

2.4.2-TTL/CMOSOUTPUT

2.4.3-EXT.COUNTERINPUT

2.4.4-VCG/MODINPUT

2.4.5-BURSTINPUT

2.5-LOGIC/DVMPROBEJACK

2.6-TRIPLEOUTPUTDCPOWERSUPPLYJACK

2.6.1-+VsJACK

2.6.2--VsJACK

2.6.3-+5V/3.3V(VCC)JACK

2.6.4-GNDJACK

2.7-RESETSWITCH

2.8-POWERON/OFFSWITCH

2.9-LCD

2.10-RS-232CSERIALPORT

2.11-VCGOUTPUT

2.12-HEATACTIVATEDCOOLINGFAN

SectionThree:OPERATION

3.1-THEORYOFOPERATION

3.2-BASICFUNCTIONGENERATOROPERATION

3.2.1-COARSEFREQUENCYADJUSTMENT

3.2.2-FINEFREQUENCYADJUSTMENT

3.2.3-FREQUENCYLOCKING

3.2.4-RANGINGSELECTION

3.2.5-WAVEFORMSELECTION

Page2

3.2.6-DUTYCYCLE(SYMMETRY)CONTROL

3.2.7-DCOFFSETCONTROL

3.2.8-OUTPUTLEVELAMPLITUDECONTROL

3.3-SWEEPOPERATION

3.4-BURSTOPERATION

3.5-MODULATIONOPERATION

3.6-MULTIPLEFUNCTIONOPERATION

3.6.1-AUTORANGINGFREQUENCY(EXT.CNTR)

 

COUNTEROPERATION

3.6.2-LOWFREQUENCYCOUNTEROPERATION

3.6.3-TOTALIZECOUNTER(TOTAL)OPERATION

3.6.4-DIGITALVOLTMETER(DVM)OPERATION

3.6.5-CMOSLOGICOUTPUTLEVEL(C-LEVEL)

 

ADJUSTMENT

3.6.6-POSITIVEPOWERSUPPLY(+Vs)ADJUSTMENT

3.6.7-NEGATIVEPOWERSUPPLY(-Vs)ADJUSTMENT

3.6.8-LOGICPOWERSUPPLY(Vcc)CONTROL

3.7-TTL/CMOSLOGICCONTROLOPERATION

3.8-PROGRAMMEMORYOPERATION

3.8.1-PROGRAMMEMORYSTORAGEOPERATION

3.8.2-PROGRAMMEMORYRETRIEVAL

3.9-COMPUTERREMOTECONTROLOPERATION

3.10-RESTOREFACTORYDEFAULTSETTINGS

3.11-INPUTANDOUTPUTPROTECTION

3.11.1-BNCOUTPUTJACK

3.11.2-BNCINPUTJACK

3.11.3-LOGIC/DVMPROBEINPUT

3.11.4-POWERSUPPLY

3.12-ONE-STEPOUTPUTAMPLITUDECONTROL

3.13-LOGICPROBEOPERATION

3.14-LIMITATIONSOFTHENEGATIVEPOWERSUPPLY

SectionFour:OPERATINGSTEPS&TROUBLESHOOTING

4.1-INTRODUCTION

4.2-BASICFUNCTIONGENERATORMODE

4.3-FREQUENCYSWEEPINGOPERATION

4.4-OUTPUTSIGNALBURSTOPERATION

4.5-OUTPUTSIGNALMODULATIONOPERATION

4.6-FREQUENCYCOUNTER,LOWFREQUENCY

COUNTER,ANDTOTALIZECOUNTEROPERATION

4.7-MULTI-FUNCTIONSIMULTANEOUSOPERATION

4.8-POSITIVEANDNEGATIVE(+Vs&-Vs)POWER

 

SUPPLYADJUSTMENT

4.9-CMOSOUTPUTLEVEL(C-LEVEL)ANDADJUSTMENT

4.10-PROGRAMMEMORYOPERATION

4.11-RS-232CCOMPUTERINTERFACEEXAMPLE

4.12-TROUBLESHOOTINGGUIDE

SectionFive:SPECIFICATIONS

SectionSix:PANELDIAGRAMS

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GENERALINFORMATION

SECTIONONE:GENERALINFO

1.1

INTRODUCTION

The

MODEL4051

programmablemultifunction

generatorisanexceptionallyversatileandeconomical

instrumentforapplicationsinR&D,Manufacturing

Tests,ServiceRepair,andTraining.Featuringan

adjustabletripleoutputpowersupplyandwaveform

generator,ithastheabilitytoprovidepowerand

signalsourcesforacircuitwhiletheuniversallogic

probe,auto-rangingfrequencycounter,anddigital

voltmeterallowuserstosimultaneouslyanalyze

andmeasurecircuitactivity.Thiscompactdevice

combinesthefunctionalityofvestandardlaboratory

instrumentsintooneintegratedunit,makingthetask

ofswitchinginstrumentsaseasyaspressingabutton.

1.2

FEATURES:

•

Autorangingfrequencyandlowfrequencycounter

coversthemeasurementrangefrom0.04Hzto

35MHzwithxedTTL/CMOSlogicthresholdor

variabletriggeringlevel.

•

Totalizecountercountsupto999999counts.

•

35MHzuniversallogicprobeforTTLlogicand

CMOSlogic(from3Vto16V),displayallthe

logicstateswithsixdifferentuniqueformats.

•

4-digitauto-rangingDCVoltmetercoversthe

range±0~250V.

•

TripleoutputsPowerSupply:

5V/3.3Vlogicsupply,with5Aoutputcurrent.

+Vsvariable0to+24V,with1.5Aoutputcurrent.

–Vsvariable0to–24V,with1.5Aoutputcurrent.

+Vsand–Vssupplycanbeseparatedordual

trackingadjusted,andeachsupplyhasshort

circuit,overcurrent,andovertemperature

protection.Digitaldisplaymonitorseachsupply

voltagewhilethesupplyisbeingadjusted.

•

MemoryBackupforprevioussettings,allowing

thisunittoworksimilartoaconventional

mechanicalswitchoperatedinstrument.All

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX 781.665.0780 - TestEquipmentDepot.com

Page6

GENERALINFORMATION

previoussettingsareretrievedandtheprevious

adjustedquantitydisplaysontheLCDbargraph.

Thedigitalencodercanadjustandmemorize

upto18activequantities,allowuserstoswitch

betweenfunctionswithoutlosingalreadymade

adjustments.

•

Autofrequencylockingcapability—unlike

conventionalfunctiongenerators,theoutput

frequencyoftheMODEL4051canbe

automaticallylockedwithin±0.2%range

atthetunedfrequency,withoutdriftcaused

bytemperature,moistureorcomponent

degeneration.

•

Onetimesetupprogrammemory—providesdata

memorywhichcanstoreuptotendifferentles

andcanberetrievedwithasinglekeystroke.

•

RS232interfaceport—enablesnetwork

connectivitybyacomputertoperformremote

monitoringorcontrolofsensorsoractuatorsin

correctiveoranalysisapplications.

modes,settings,andquantityadjustmentsinuse

arememorizedandcanberestoredimmediately

afterpowerup.

•

LCDBack-lightdisplay—highbrightness,uniform

coldcathodeuorescentlampback-lighting

providesahighcontrastdisplayeasilyreadable

frommultipleanglesevenfromadistance.

•

Sweepfunctiongeneratorcoveringthefrequency

rangeof0.14Hzto20MHzwithlarge6-digit

display,CoarseandFineadjustments,DCoffset

andDutycyclecontrols,Waveformprovided

withSine,Triangle,Square,Saw-tooth,±Ramp,

±Pulse.WithoperatingmodesofNormal,

Sweep(linearorlogarithm),Burst(singleor

multiple),Modulation(FMorAM),VCG.Output

amplituderangeof20mVto20Vp-p.TTL/CMOS

logicoutput:CMOSoutputlevelcanbeadjusted

from3.0Vto16.0V.TheTTLsignalcanbe

switchedbetween5Vor3.3Voutput,ithasthe

samefrequencyasthemaingenerator.

•

Userfriendlykeyswitchoperation—Asfunction

keysarepressed,correspondingfunctionsand

Page7

GENERALINFORMATION

identifyyearofmanufacturing,thesecondtwodigits

identifythemonth,andthelastfourdigitsrefertothe

manufacturedrunquantity.

1.5INSTRUMENTPOWERANDCARE

TheACpowerisinternallysetfor120Vor220VAC

byajumper.Thepowersettingismarkedclearly

onthebackpanel.Besuretocheckthebackpanel

beforeconnectingthelinevoltage.Thelinevoltage

mustbewithin±10%ofthesettingvoltage.Line

frequencymustbewithinarangeof46Hzto68Hz.

Theinstrumentshouldnotbeturnedonandoff

quicklyandrepeatedlyaslossofdatasavedinsystem

memorymayresult.

Replacementfusesmustbe2Aforthe120VACor1

Aforthe220VAC.ThefuseholderisinsidetheAC

powerreceptacle.

IftheMODEL4051needscleaning,therubberboot

canbeeasilyremovedforcleaningpurposes.To

reassembletherubberboot,pushthefourrubbertabs

backintotheirholeswithapinorasmallscrewdriver.

1.3

UNPACKINGANDINSPECTION

TheMODEL4051multi-tasklabinstrumentwascarefully

testedandinspectedbothmechanicallyaswellas

electronicallypriortoshipment.Uponreceivingthe

instrument,carefullyunpackallitemsfromtheshipping

cartonsandinspectthemforanyobvioussignsof

physicaldamagethatmayhaveoccurredduringdelivery.

Reportanysuchdamagetotransitagentimmediately.

Saveboththepackingboxandfoamblocksforfuture

useincasere-shipmentisrequired.Afterunpackingthe

system,checkforthefollowingincludeditems.

•

Oneprogrammablemultifunctiongenerator

•

Onelogicprobe

•

OneBNCcable

•

OnePowerCord

•

OneOperatingManual

1.4INSTRUMENTIDENTIFICATION

EachBKPrecisioninstrumenthasaneight-character

serialnumber(e.g.04120015).Thersttwodigits

Page9

FUNCTIONS

SECTIONTWO:FUNCTIONS

1.1INTRODUCTION

Push-buttonkeyswitchesaccessallfunctionsofthe

MODEL4051.Keysmaybededicatedormultiplexed

withmultiplefunctionassignments.Asafunctionkey

ispressed,arelatedfunctionstatusmessageisshown

ontheLCDdisplay.Thedigitalencodercanadjustand

memorizetheactivequantityofeachaccessedfunction,

allowingtheusertoswitchbetweenfunctionswithout

losingalreadymadeadjustments.OutputandInput

connectionstotheMODEL4051areprovidedthrough

BNCjacks.Fourbananajacksareavailableforusewith

thetripleoutputpowersupply.

Note:

BKPrecisionalsoofferstheMODEL4050,aspecially

conguredMODEL4051withoutatripleoutputpowersupply.

2.2FUNCTIONKEYSWITCH

TherearefourteenkeyswitchesaroundtheLCDdisplay.

Eachkeycapisprintedwiththenameofadedicated

functionorageneralcontrolname.Whenafunction

keyispressed,on-screenmessagesappeartoindicate

theactiveoperation.

FunctionKeyButtons:

CAL,SOURCE,SWEEP,BURST,MOD,SET,

RNGUP,RNGDN,WAVEFORM,SYM,OFFSET,LOGIC,FUNCTION,

ADJUST.

2.2.1“CAL”KEY

WhiletheMODEL4051issetinfunctiongenerator

mode,theCALkeycanresetthe50OHMoutputsignal

to50%dutyandtheDCoffsettozero.Operatinginthe

Positive(+VS)orNegative(-VS)powersupplyadjustment

mode,thiskeyenablesorinhibitsthe“Tracking”

adjustmentmodeforbothpowersupplies.The“CAL”

keyalsorestoressavedsettingsfromprogrammemory.

2.2.2

“SOURCE”KEY

ThecontrolsignalforSweep,Burst,andModulation

operationsofthefunctiongeneratorcanbeselected

eitherfromanInternal(INT)orExternal(EXT)source.

TheSOURCEkeytogglesbetweensourcesforthe

controlsignalwhenpressed.Bydefault,functionsare

setto(INT)mode.TheSourcekeyalsoservesasthe

entrykeytoProgrammemory,eitherformemorystorage

ormemoryrecalloperations.InSINGLEBURSTmode,

theSOURCEkeyisusedtoreasinglepulsemanually

whenTIMEissettothemaximumquantity.

Page10

FUNCTIONS

2.2.3.“SWEEP”KEY

Thefrequencysweepingfunctioncanbeselectedeither

inLinear(LIN)orLogarithm(LOG)mode.Pressingthe

SWEEPkeycantogglebetweenthesetwooperations.

BydefaulttheSweepfunctionissettoLINmode.

2.2.4“BURST”KEY

Theoutputsignalfromthe50OHMBNCJackcan

becontrolledasasingle(SINGLEPULSE)Burstora

multiple(MULTP)Burstofapulsetrain.Pressingthis

keycantogglebetweenthesetwotypesofoperations.

BydefaulttheBurstfunctionissettoSINGLEmode.

2.2.5“MOD”KEY

Themaingeneratoroutputcanbemodulatedbyan

internalsignal(astandard1KHzsinewave)oran

externalsignalfromtheVCG/MODBNCJack.Pressing

thiskeyselectsbetweenfrequencymodulation(FM)

orAmplitudemodulation(AM).Bydefault,the

modulationfunctionissettoFM.

2.2.6“SET”KEY

Undernormaloperation,theSETkeyturnsthe

backlightoftheLCDdisplayonoroff.Whenthe

functiongeneratorissettoperformaSweep,Burst,

orModulationoperation,thiskeyallowstheuserto

strobeeachstepandadjustquantityduringsetup.

Thiskeyalsoallowstheusertostorecurrentsettingsto

programmemory.

2.2.7“RNGUP”KEY

Pressingthiskeycanincreasetheoutputfrequencyby

adecadeuntiltherangereaches20MHz.Thecurrent

rangeisdisplayedbythesideofthiskeyinatotalof

eightdifferentranges.

2.2.8“RNGDN”KEY

Pressingthiskeycandecreasethefrequencyrangebya

decade,untiltherangereaches2Hz.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

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Page11

FUNCTIONS

2.2.9“WAVEFORM”KEY

SelectsthewaveformoftheoutputsignalSine,Square,

orTrianglewaveform.Thedisplayedwaveformbythe

sideofthiskeyisthecurrentoutputwaveform.

2.2.10“SYM”KEY

Thiskeyenablesthedutycyclefunction,whichadjusts

thesymmetryofthemainoutputsignalandTTL/CMOS

signal.Thearrowsignsonthedisplay(



or



)

indicatestheadjusteddirection.Forasignalwitha

dutycycleotherthan50%,oneofthearrowswillbe

displayedconstantly.

2.2.11“OFFSET”KEY

ThiskeyenablesDCoffsetadjustmentofthemain

outputsignal.Thepositiveandnegative(+),(-)signson

thedisplayindicatesthedirectionoftheDCoffset.As

longasanoffsetexists,asignwillbedisplayed.

Secondaryfunction:

Inmultifunctionsequencemode,

thiskeyservesasthebackwardkey.

2.2.12“LOGIC”KEY

SelectsthelogicsignalforTTL5V,TTL3.3VorCMOS

LogicattheTTL/CMOSoutputJack,thelogicthreshold

levelsofthelogicprobe,thetriggeringlevelsofthe

counters,andthelogicpowersupply(Vcc)outputs.

2.2.13“ADJUST”KEY

Pressingthiskeyatanytimewillabortotherfunctions

andenterintofunctiongeneratorcoarsefrequency

adjustmentmode.Thiskeycanthentogglebetween

coarseandnefrequencyadjustments.Thetypeof

quantitybeingadjustedisindicatedbytheblinking

signdisplayedabovethe“ADJUST”key.

2.2.14“FUNCTION”KEY

Controlsfunctionsanddisplaysforoperations

outsideofthefunctiongenerator.Presstostartthe

multifunctionsequencemode.Uponenteringthis

multifunctionsequence,eachadditionalpressofthe

“FUNCTION”keyadvancesforwardonestepinthe

sequence,the“OFFSET”keystepsbackward,andthe

“ADJUST”keyabortsthesequence.

or



Page12

FUNCTIONS

OntheMODEL4051,thefunctionsequenceadvances

inthefollowingorder:

Note:

OnthespeciallyconguredMODEL4050unit,thesequence

loopstothebeginningaftertheCMOSLevelfunctionsinceitlacks

theMODEL4051’stripleoutputpowersupply.

2.3CONTROLKNOB

Therearetwocontrolknobsonthefrontpanel,oneis

dedicatedtothesignaloutputlevelcontrol,andthe

otherismultiplexedforallotheradjustments.

2.3.1DIGITALENCODER

Thedigitalencodercanadjustandmemorizeupto

18activequantities,allowinguserstoswitchbetween

functionswithoutlosingalreadymadeadjustments.The

activeitembeingadjustedbytheencoderwillblink

ontheLCD.Thefullrangeofeachadjustablequantity

correspondstothetwelvesectionsofthebargraph.

2.3.2AMPLITUDEPOT

Controlstheamplitudeofthesignalattheoutputjack

with20Vp-pintotheopencircuit,10Vp-pintothe

50OHM.Attenuationfactorscanbeatotalof–40dB

fromthemaximum.

2.4BNCOUTPUTANDINPUTJACKS

ThereareveBNCjackslocatedontherightsideof

thefrontpanel,twoforoutputsignalsandthreefor

inputsignals.

•2.4.150OHMMAINOUTPUT

UsedformainfunctiongeneratoroutputwithsuperimposedDC

offsetandDutycycleadjustment.

•2.4.2TTL/CMOSOUTPUT

ProvidesTTL5V,TTL3.3VorCMOSsquarewaves.When

theselectedoutputwaveformisthesquarewaveform,ithas

thesamefrequencyanddutycycleasthemainoutput,butis

independentofoutputlevelcontrolfromtheAmplitudePotand

DCoffsetcontrols.

•2.4.3EXT.COUNTERINPUT

Usedformeasuringthefrequency(3Hzto35MHz)ofasmall

amplitudesignalorasignalwithDCbias.Thisinputjackaccepts

ACcouplingonlyandtheinputsignalmustbegreaterthan3Hz.

FunctionGenerator->Freq.Counter(EXTCNTR)->LowFreq.

Counter(EXTCNTRTOTAL)->TOTALIZECounter(TOTAL)->

DigitalVoltmeter(DVM)->CMOSlevel(C-LEVEL)->Positive

Supply

(+Vs)->NegativeSupply

(-Vs)->LogicSupply

(Vcc)

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