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超外差接收
释义
超外差接收
Encyclopedia
工学
【通信基础理论】
释
superheterodyne receiving
超外差接收
将接收到的已调高频信号(即调制后的高频信号)送到混频器,然后与本地振荡器所产生的高频信号进行混频,在其输出端得到的波形包络形状与输入高频信号相同,但频率却降为某一固定中间频率(简称中频)的信号接收技术。
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acoustic level, sound level
acoustic log
acoustic logging instrument
acoustic logging/sonic logging/aconstilog
acoustic logging while drilling
acoustic loss
acoustic measurement experiment
acoustic metamaterial
acoustic metamaterials
acoustic-metamaterials
acoustic meteorological oceanographic survey
acoustic meter
acoustic method
acoustic metrological technology
acoustic metrology
acoustic microjet flow
acoustic microscopy
acoustic microscopy detection
acoustic mode
acoustic model
acoustic negative refracting materials
acoustic neuroma
acoustic ohm
acoustic oscillation
acoustic peak
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