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1、frequencyfunction•frequencyresponse301TunedTunedcaststationsorafrequencymeterusedinelec-tototric-generatingstations).2f2ffrequencymultiplierAcircuitordevicewhoseout-putfrequencyisamultipleoftheinputfrequency.See,forexample,FREQUENCYDOUBLER.frequency-multiplyingamplifier
2、SeeMULTI-PLIERAMPLIFIER.frequency-multiplyingtransformerAmagneticOutInamplifierthatgeneratesharmonicsofthesupplyfrequency.Theeffectresultsfromthenonlinear-ityofthetransformercorematerial.frequencyoffset1.Thedifferencebetweenanac-tualfrequencyandthedesiredfrequency.2.Ina
3、communicationstransceiver,thedifferencebe-tweenthereceiverfrequencyandthetransmitterfrequency.Insomemodes,suchassingle-side-frequencydoublerband(SSB),theoffsetisnormallyzero.Inothermodes,notablycontinuous-wave(CW)MorsefrequencyfunctionSeePROBABILITYDENSITYcode,theoffset
4、isnormallyseveralhundredHz.FUNCTION.3.SeeFREQUENCYSPLIT,1.frequencyindicator1.Adevicethatindicatesfrequencyoverlap1.Acommonbandoffrequen-whenaphaseorfrequencyiscommontotwoal-ciesbetweentwoadjacentchannelsinacommu-ternatingcurrents.2.Thedisplayordialthatnicationssystem.2
5、.Acommonfrequencyregionshowstheoperatingfrequencyofaradiore-betweentwoassignedbands.3.Aconditioninceiverortransmitter.3.SeeFREQUENCYME-whichpartsofthesidebandsoftwosignalsoc-TER.cupythesamerangeoffrequencies.frequencykeyingSeeFREQUENCY-SHIFTKEY-frequencypullingAchangein
6、thefrequencyofaING.circuit,especiallyofaself-excitedoscillator,re-frequencymeterAninstrumentformeasuringthesultingfromthedetuningeffectsofanexternalfrequencyofanalternatingcurrent.Theseveralcircuit,device,orcondition(suchasbodycapac-differenttypesareusedindifferentappli
7、cations.itanceorachangeinthetemperature).AlsoseeAUDIOFREQUENCYMETER,FRE-frequencypushingAneffectinwhichacurrentQUENCYCOUNTER,POWER-FREQUENCYME-changeinasourceoscillatorcausesashiftinTER,andWAVEMETER.sourcefrequency.frequency-modulatedradarSeeFMRADAR.frequencyquadruplerS
8、eeQUADRUPLER,2.frequencymodulationAbbreviation,FM.AfrequencyquintuplerSeeQUINTUPLER,2.methodofconveyingintelli
