求英语翻译,在线等
Theprocessofchangingoneofthecharacteristicsofananalogsignalbasedonthe
informationindigitaldataiscalleddigital-to-analogconversion.Itisalsocalled
modulationofadigitalsignal.Thebasebanddigitalsignalrepresentingthedigital
datamodulatesthecarriertocreateabroadbandanalogsignal.