ad9371_matlab wave error

Hi, I'm using zc706 and ad9371.

Now, I'm trying to run the matlab example ad9371_matlab.m  https://github.com/analogdevicesinc/MathWorks_tools/tree/master/hil_models/legacy/adrv9371

I get a waveform, but it's not the ideal sine wave.

Thank you for any help.