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Is there any way to measure frequency deviation in a recorded frequency modulated time domain data? The little research i have done on net mostly concerns with frequency deviation measurement using spectrum analyzer in real time i.e. data continuously​ received on spectrum analyzer​ while measuring deviation in carrier frequency. If i record FM data using some digitizer and i know the carrier frequency, is it possible to measure frequency deviation using some fft technique on recorded data offline?

Thanks

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    $\begingroup$ You can do demodulation of pre-recorded FM signals, but, in my opinion, you'd better use a software implementation of all-digital phase locked loop in your solution rather than fft analyzers $\endgroup$
    – V.V.T
    Mar 28, 2021 at 11:04
  • $\begingroup$ @V.V.T I fully agree, the FFT is simply the wrong tool here. I'd ask you to write that as an answer, I'd upvote it. $\endgroup$
    – Marcus Müller
    Mar 28, 2021 at 11:25
  • $\begingroup$ I would rather not make haste with prompts: maybe the OP is going to use the idea for a student research project. $\endgroup$
    – V.V.T
    Mar 28, 2021 at 19:23

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