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I'm new here.

Currently I'm struggling with the phase of FFT. I read that the phase of FFT is relative to the start of the time domian signal. In my measurement I recorded a signal which is a sinus sweeping from 100hz to 3000hz. after FFT i obtained a phase spectrum within the specified frequency range. what I dont get is how do we get for each frequency component a phase if the phase of fft related only to the start time. How does the phase is transformed from the time domain to the frequency domain.. I would really appreciate if some of you guys provide me an explaination regarding to this.

cheers,

Eva

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# Phase of FFT

**Physics Forums | Science Articles, Homework Help, Discussion**