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ad9361 DDS tone is distortion at high frequencies

Question asked by weiwade on Jun 12, 2018
Latest reply on Jun 12, 2018 by DragosB


      I am working on ad9361 fmcomms3,when i set the DDS code finction with no os driver as below(figure1.) ,the frenquency is 5M,but i don't see the sine wave on spectrum analyzer, it looks like distortion on time domain(figure2).

      If i set frenquency at 1M (figure3) , i can see sine wave on spectrum.(figure4)



Please kindly get back to me asap, thanks.