Hello, I am now studying ad9361 data launches.The I data and Q data are generated by matlab.The code is shown below。
The filter coefficients are configured as follows：
TX: LVDS, FDD, DDR. The fb_clk is data_clk from the ad9361.The LO is 120M.
Now, thespecturm of output of AD9361 is as follow.
The spectrum has three components ： 116M,120M,124M.
There is two questions.
1.The configured filter coefficients are correct?
2.Why spectrum has three components?
I hope you can give me some advice！Thank you!