gary36
Full Member level 4
I have an input which has 50 Hz component and harmonics extending upto audio frequencies. The fundamental is likely to change from 48.5 to 52.5Hz . The goal is to extract the fundamental using FFT and compute the RMS. I am unclear how to select the window functions, adc sampling frequency and no of fft points to capture the range and compute rms accurately. RMS accuracy should be around +/-1%.