I have the overview of signal with cut-off frequency fc that I want to sample using an ADC with sampling frequency of fs, I have seen that some of my colleagues wanted to dumb any noise at -60dB at frequency fs-fc as you see it in the picture.
for my understanding of nyquist theorem, I need to damp any signal over fs/2 for how much -x dB I want. here I could not understand why it is at (fs-fc)
for my understanding of nyquist theorem, I need to damp any signal over fs/2 for how much -x dB I want. here I could not understand why it is at (fs-fc)