We performed the AD9371 Phase noise measurement using the Windows based TES utility. For this measurement we have the IQ having tone of -1MHz.
We observed that some times the phase noise measurement shows the modulation of spur at 75KHz, Attached the spectrum. This is going away if we hard reboot and intialize the device again.
we would like to understand what is the cause of the 75MHz harmonic data. Is there any calibrations or trackings which is creating this issue.
please let us know if you have any suggestions on the measurement.