What is the phase of a signal?

The phase involves the relationship between the position of the amplitude crests and troughs of two waveforms . Phase can be measured in distance, time, or degrees. If the peaks of two signals with the same frequency are in exact alignment at the same time, they are said to be in phase.

Phase Spectrum − – The plot of the phase of Fourier coefficients versus frequency is called the phase spectrum of the signal.

The magnitude corresponds to the frequency of the size wave, and the phase corresponds to where it hits zero .