所需E币: 4
时间: 2020-1-13 19:56
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射频和VF设计的参考因素BROADCASTINGDIVISIONApplicationNoteReferencefactorbetweenRF(referencedtosynctoplevel)andVFProducts:TVDemodulatorsandVideoAnalyzersUAF+EFA33VSA+B107BM10_0EReferencefactorbetweenRF(referencedtosynctoplevel)andVFLetusanalyzeamodulatedsignal:0%11%42%73%100%VF100%whitesideband50%grey0%black-43%synctopRF/IFLevelPercentagesforRF/IFSignalwithReferencetoVFSignalNowdothecalculation:ThesidebandamplitudereferencedtoUpp(USB,LSB)isapp(USB,LSB)=73%-11%=62%incaseofdoublesidebandmodulation,aswehaveinVSBfrequencyrange.73%VisionCarrierap(USB)=15.5%ap(LSB)=15.5%42%VisionCarrieratVF50%greyap(LSB)=15.5%11%ap(USB)=15.5%app(LSB,USB)=62%73%Vect……