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AD9361 half band filter rejection limits

Question asked by gizmoaudio on Jun 18, 2015
Latest reply on Jun 22, 2015 by tlili

For adjacent channel rejection to an interferer, I'm not getting enough rejection through the halfband filters. The AGC detector comes before the FIR filter so the AGC is seeing some of the interference and reducing the signal because the AGC works on the composite power. We have enough backoff for the ADC but would like to eliminate the interference from getting into the AGC loop. Can the AGC detection be moved after the FIR filter. We are running slow AGC with either a full table or split table.

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