HP-210A-Brochure 电路图.pdf

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1、THEMODEL2l0ASQUAREWAVEGETERATaR TechnicalInformation Themodel210squarewavegeneratorisaneinstrument whichisextremelyusefulinbothproductiontestingand developmentwork.Itprovidesa newapproachtothe problemofmeasuringthecharacteristicsofaudiofrequen- cyequipment.Thisgeneratorwillsavevaluabletimein product

2、iontestingbecauseoneortwoobservationswill checkthefrequencyresponseofapparatusheroheretofore alargenumberofobsorvationswerenecessary.Thisnow instrentisanimportanttoolfordevelopmentworkbe- causoitwillshow upphaseshiftandtransientcffects l bothofviliichareratherdifficulttostudybyother methods. USES: -

3、Whenasquarewaveisappliedtoanamplifierthe topofthuwaowillshowdistortionifthefrequency responseoftheamplifierdocsnotextendto2tleastone tenthoftheappliedfrequency.Likewisethesidesofthe TIavewillbedistorte0iftheresponseofthoamplifier doesnotextendtoatleasttentimesthefrequencyofthe squarewaveapplied.Thus

4、oneobservationwithasquare wveappliedtoananlifierillcheckawidefrequency range,argcof100to1orevenmore.Thisisextreme- lyimportantbecauseoncethepropercriterionhasbeen establishedaproductiontestcanbesetupwithoneorat themosttwoobservationswith8squarewave. Asquarewave mayalsobeusedtostudyphaseshifteffects

5、inanamplifier.Anamplifierwillnotreproduceasquare wavefaithfullyunlessboththeanwlitudeandphaseshift characteristicsarccorrect.Thusiftheamplitude responseisknowntobegood,phaseshifteffectscanbe determinedbyasquarewaveobservation. Peaksordeficienciesinamplificationofanamplifiercan bereadilydetectedwitha

6、squarewavegenerator.Ampli- ficationpeCksappear28dampedoscillationsontopoftho amplifiedsquerewaveandthesepeakscanbomeasuredin bothfrequencyandamplitudewithagivenobservation. DeficienciesinamplificationatsomepartoftheDoplifi- cationbandhavethesameappcaranceexceptforphasedis- placementsinthodampedoscil

7、lations. Asquarewaveisalsoveryusefulindetoriningthetran- sientresponseofnetworks.TimeconstantsofR-Ccircuits canbeeasilyobserved,dampedoscillationsofresonnnt circuitscnnbechecked,andthetransientbehaviorof complicatadnetworkscanbestudiedbytheapplicationofa squarewavetothenetworksandobservingthevoltage

8、or currentwithanoscilloscope. RadioFans.CN 收音机爱 好者资料库 -. . MODEL210AContinued SPECIFICATIONS FREQUENCYRANGE:Theoutputofthegeneratorissquareith in1%overthefrequencyrangefrom20 cyclesto10,000cycles.Thetimeforthe voltagetoriseto90%ofmaximumisapprox- mately1microsecond,thusareasonably squarewavecanbeobt

9、ainedevenat100kilo- cycles. OUTPUTVOLTAGE:Theoutputvoltageis50voltspeaktopeak opencircuit.Theoutputimpedanceis1000 ohmsbalnncedtoground. OUTPUTATTENUATOR:A 75db.attenuatorisprovidedintheout- putwith5dbstepsThefrequencyresponse oftheattenuatorissufficientlywideso thattheoutputwaveshapeisnotaffected e

10、venatthehighestfrequencies. INPUTVOLTAGE:Thegoneratormaybedrivenfromanycon- venientsourceofalternatingvoltageorit maybeint0rnallysynchronizedtothopower linefrequoncy.Adrivingvoltageoftwo voltsisrequiredondtheinputimpedanceis 25,000ohms. MOillJTING:The Model 2l0Aismountedinanattractive steolcabinet15

11、long,8high,and9deep finishedinwrinklegrey.Thepanelisgrey bakedenamelwithmachineengraveddesigna- tions.Themodel2l0ARism0untcdinare- lnyreckDssemblywith2.19by7paneland is8deop.Thedustcoverisremovablefrom thorearandthebindingpostsmaybesUP9lied eitheronthepanelorattherearofthe asser.1bly. POVVERSUPPLY:T

12、hegeneratorisprovidedwithabuilt-in powersupplytooperatefrom110volts50or 60cycles.Itrequiresapproximately50 watts. PRICES:Made1210A.$125.00 Model 2l0AR.$130.00 Pricesarenot,completowithtubes,f.o.b.PaloAlto,California Pricesanddatasubjecttochangewithoutnotice. HEWLETT-PACKARDCO. 481PAGEMILLROAD PALOALO,CALIFORNIA September19,1941 RadioFans.CN 收音机爱 好者资料库