Hi, My friend
When I tested the demo board of AD9361, I found a strange issue:
When input signal frequency = LO frequency:
1. For AGC mode, if BB DC tracking=ON, some times the noramal spectrum become strange one;
2. For AGC mode, if BB DC tracking=OFF, the strange spectrum never happen;
3. For MGC mode, no matter BB DC tracking=ON/OFF, the strange spectrum never happen;
My question is :
Why BB DC tracking enbale will cause such strange spectrum when the frequency of input signal=LO frequency in AGC mode?