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High noise level/different spectrum for each run

Question asked by jchenak on Apr 3, 2018
Latest reply on Apr 12, 2018 by jchenak

I used attached profile to configure my AD9361 and the input data is 01 code. The spectrum looks like below which can be observed that the noise floor is very high. Any method to reduce the noise in this case? Otherwise, when I re-program and re-run the system with same configuration, the spectrum looks different. I try to read the register 0x0A7 to check the calibration and found that the value is different for each run. Sometimes it is 11111100, sometimes it is 11111101.

 

1st run

 

2nd run

 

3rd run

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