the general rule for aliasing. If my sampling frequency is Fs=800Mhz signal frequency =120Mhz.
for the 4th harmonics 480MHz its 80MHz above nyquist frequency(400Mhz) thus its mirrored 80MhZ back to 320MHz.
What about 1120MHz the closest nyquist frequnecy to it is 2*400 so its supposed to be mirrored 800-320=480 why we do double mirroing for it? why it also mirroed to 320Mhz?