My customer observed TX spurious of AD9361 along offset 30.72MHz as shwon below.
So, I did a comparison test using FMCOMMS3-EVB and ZC706 and confirmed spurious in the evaluation board as below.
- Filter FIR Conf : LTE10 MHz.ftr enable
- TX LO Freq : 2132.5MHz
- DDS Mode : DAC Buffer Output (LTE10.mat)
Please tell me cause and solution of the above spurious.