Reflection Module 07 (201-33-5329,A) by Md. Rafid Hasin Piyas - Friday, 30 July 2021, 9:47 PM Number of replies: 0 F.M. ( Frequency modulation ) : The frequency of carrier wave is varied in proportion to the modulating signal waveform.P.M. ( Phase modulation ) :The phase of carrier wave is varied in proportion to the modulating signal waveform. Permalink