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AM signal with FAST AGC

Question asked by jarod0523 on Apr 8, 2018
Latest reply on Apr 16, 2018 by sripad

Recently I'm using AD9364 to receive AM signal with FAST AGC settings.  I got  a problem.

I choose signal generator to generate the AM signal(carrier frequency is 245.01MHz, AM depth is 85%,AM RATE is 1KHz,RF power is -70dBm). Set Rx LO to 245MHz.

At first, I only set carrier signal on without modulation, FAST AGC works well while changing  the input power ,and waveform is just fine  as followed.

Then  I set AM modulation on , someting wrong occurs,and waveform turn to be as followed:

I wonder  what caused this  issue.

Thank you !