We tested ADF5610 evaluation board using external low phase noise OCXO and we observed spurious frequencies around 10KHz. I attached the test results & settings done in GUI.
External Reference: 120MHz,
RF Output frequency: 13.58GHz
There is no spur in the phase noise graph provided by you in above reply..
So We gave External reference (100MHz, 80MHz, & 50MHz) using signal generator and observed more variations in the spurious frequencies while varying external reference (R divider kept constantly =1). I also attached some results.
Please suggest any method to reduce these spurs.