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IQ amplitude imbalance

Question asked by uks on Jun 19, 2018
Latest reply on Jun 20, 2018 by Vinod

I use the AD9361 to record WIFI packets at 2,4GHz with a sample rate of 40MHz.

Very often the amplitude of the I and Q signals change periodically during one recorded WIFI burst: When the amplitude of I goes high, the amplitude of Q goes low. I tried first FAGC, then manual gain control and set the gain to a fixed value, that doesn't change anything. Sometimes this behavior doesn't occur and the amplitude doesn't change.

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