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ADRV9361 transceiver ADC Problem

HELLO,

Hope you are doing well.

I am trying to implement QPSK modulation on ADRV1-9361-Z7035.

At transmission side, my signal is modulated correctly giving all four-phase transitions according to data pattern when visualized on ILA as shown in figure below:

TX_15to0 shows results for cos phases.

TX_31to16 shows results for sine phases.

TX_31to0 shows concatenated results which is being transmitted through DAC.

 

When I transmit the same modulated signal through DAC on one channel and loop back it TX and RX using SMA cable and analyze the received signal at ADC, the Received signal shows irregular behavior when analyzed on ILA like at some instance it gives two of the phase transitions in I while other two transitions in Q but at other instance it shows all four transitions in either I or Q and if I concatenate both I and Q it either shows all four transitions or only two of them. It is not showing a constant behavior though my LO frequency is fixed in all cases.

Figure below shows similar results at RX as transmitted.

Figure below shows inverted results at RX as transmitted.

Figure below shows inverted results at RX as transmitted.

Figure below shows sum results at RX and TX both

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