Amateur Extra › E7 Practical Circuits › E7F07
E7F07
What function is performed by a Fast Fourier Transform?
Pick an answer to check it.
Answer: C. Converting signals from the time domain to the frequency domain
A Fast Fourier Transform takes samples over time and calculates which frequencies are present. That converts a time-domain signal into a frequency-domain spectrum, as on a waterfall display.
Tip: FFT: time in, frequency out.