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ad9361 Receive signals

Question asked by nifengfeixiang on May 29, 2018
Latest reply on May 30, 2018 by travisfcollins

hello,

      I have one ad-fmcomms2-ebz with ad9361 and one ad-fmcomms4-ebz with ad9364. Now I use ad9361 as a launch board to transmit 16qam modulated signals using the 16qam_20m.txt you provided with zynq7000-zc702. And I use another zc702 board with ad9364  to receive the signal and display the constellation on the screen. But the constellation  rotates quickly and is very vague. Over time,  the constellation will not be seen, only a bunch of scattered points. 

How can I see a clear and stable constellation?

 

Thanks in advance.

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