We have our own AD9361+ FPGA board.
The FPGA design is referred to FMCOMMS2 HDL reference design, and the Microblaze is running non-OS code. The UART console displays "successfully initialized" message. All the settings are default in non-OS code. We turned off the dds tx tone and measure the TX output with spectrum analyzer. Below is the screen capture .
We've compared the same design on KC705 + FMCOMMS2, the analyzer output looks much smoother at the area close to the peak (2.4G center). Any clue about the noise coming from ? Thanks for your help !