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AD9361 I and Q distortion

Question asked by on Aug 30, 2017
Latest reply on Sep 11, 2017 by Vinod

We design a FDD tranceiver on a FMCOMMS2 + ZedBoardSlow AGC is used on the receiver. The problem is when the receive signal is low (~ -70dBm) and change rapidly in a wireless environment, I and Q samples are distorted or reversed. Since there is no external LNA used, is it possible ADC goes wrong when signal is small and changing fast? Thanks!