• 频率调制载波频率依照调校讯号瞬时而改变调制。

    Frequency modulation(FM): the form of modulation in which the frequency of the carrier is varied in accordance with the instantaneous value of the modulating signal.

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  • 调幅讯号频谱一半强度讯号之频谱分别正负位移射频载波频率

    The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.

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  • 调幅讯号频谱一半强度讯号之频谱分别正负位移射频载波频率

    The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.

    youdao

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