What function is performed by a Fast Fourier Transform?
Converting analog signals to digital form
Converting digital signals to analog form
Converting signals from the time domain to the frequency domain✓Bonne réponse
Converting signals from the frequency domain to the time domain
Explication
The Fast Fourier Transform is an efficient algorithm for the discrete Fourier transform. It takes a block of time-domain samples and returns the amplitude and phase of the frequency components in it, which is what a panadapter or waterfall display shows.