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AD9371 RX path samples data interfered


I have found the data interfered in the data from the AD9371 RX1, and I want to find the rout cause and eliminate it.

I tested the AD9371 with the centre frequency of 2.601GHz, signal amplitudes -30dbm as input signal. and the LO frequency 2.55GHz. The data was captured from JESD into FGPA, and then transfer to notebook computer with the RJ45 interface, after display the sampled data, I found the signal interfered, I attached the test data with picture as belows.