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AD9361 rx Spectrum problem

Question asked by buzuoluren on Feb 27, 2018
Latest reply on Mar 7, 2018 by buzuoluren

Hello,I ran into a problem when I tested the ad9361 receiver. My configuration for ad9361 is 2R2T, the center frequency 2400M, the data rate 40M, the gain of 56dB, and the FIR filter on the chip.
When the test was tested, the signal frequency I gave was 2402M, and the signal intensity was 44dbm.
The frequency spectrum of the captured signal after FFT is shown in the following diagram. The red part is noise, and the blue part is the frequency spectrum after the signal is added.
This can see a lot of stray, and I don't know where the possible problems come out.