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1、frequencyfunction•frequencyresponse301TunedTunedcaststationsorafrequencymeterusedinelec-tototric-generatingstations).2f2ffrequencymultiplierAcircuitordevicewhoseout-putfrequencyisamultipleoftheinputfrequency.See,forexample,FREQUENCYDOUBLER.frequency-multiplyi
2、ngamplifierSeeMULTI-PLIERAMPLIFIER.frequency-multiplyingtransformerAmagneticOutInamplifierthatgeneratesharmonicsofthesupplyfrequency.Theeffectresultsfromthenonlinear-ityofthetransformercorematerial.frequencyoffset1.Thedifferencebetweenanac-tualfrequencyandthe
3、desiredfrequency.2.Inacommunicationstransceiver,thedifferencebe-tweenthereceiverfrequencyandthetransmitterfrequency.Insomemodes,suchassingle-side-frequencydoublerband(SSB),theoffsetisnormallyzero.Inothermodes,notablycontinuous-wave(CW)MorsefrequencyfunctionSe
4、ePROBABILITYDENSITYcode,theoffsetisnormallyseveralhundredHz.FUNCTION.3.SeeFREQUENCYSPLIT,1.frequencyindicator1.Adevicethatindicatesfrequencyoverlap1.Acommonbandoffrequen-whenaphaseorfrequencyiscommontotwoal-ciesbetweentwoadjacentchannelsinacommu-ternatingcurr
5、ents.2.Thedisplayordialthatnicationssystem.2.Acommonfrequencyregionshowstheoperatingfrequencyofaradiore-betweentwoassignedbands.3.Aconditioninceiverortransmitter.3.SeeFREQUENCYME-whichpartsofthesidebandsoftwosignalsoc-TER.cupythesamerangeoffrequencies.frequen
6、cykeyingSeeFREQUENCY-SHIFTKEY-frequencypullingAchangeinthefrequencyofaING.circuit,especiallyofaself-excitedoscillator,re-frequencymeterAninstrumentformeasuringthesultingfromthedetuningeffectsofanexternalfrequencyofanalternatingcurrent.Theseveralcircuit,device
7、,orcondition(suchasbodycapac-differenttypesareusedindifferentapplications.itanceorachangeinthetemperature).AlsoseeAUDIOFREQUENCYMETER,FRE-frequencypushingAneffectinwhichacurrentQUENCYCOUNTER,POWER-FREQUENCYME-changeinasourceoscillatorcausesashiftinTER,andWAVE
8、METER.sourcefrequency.frequency-modulatedradarSeeFMRADAR.frequencyquadruplerSeeQUADRUPLER,2.frequencymodulationAbbreviation,FM.AfrequencyquintuplerSeeQUINTUPLER,2.methodofconveyingintelli
