I use grc to build a GFSK mod/demod flowgraph .
my setting is , sample/symbol =4, symbol_rate=1Mhz.
my gec filelink : https://drive.google.com/file/d/1XeWz9fBw9GcCzAuG1lslrUn4XaRS6eGm/view?usp=sharing
I run and get fft waveform bounce up and down, not stable.
here is waveform record link : https://drive.google.com/file/d/1fSHKSJ4VCQZ5NqPP3lJxwP896kySrwbv/view?usp=sharing
if I change sampling rate from 4Mhz to 1/2 Mhz , fft wavefrom become stable .
does anyone know the reason / solution ?
looking forward to reply.thanks!
Sorry for the late reply. Do you still need help with this question ?
I think the question was answered at: ez.analog.com/.../plutosdr-oscillsope-waveform-bounce-up-down-when-sampling-rate-4mhz