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Phase noise - Auto carrier

Question asked by rhum1 on Jul 27, 2015

I want to do phase noise measurement with my MXA and I have a problem. I have two signals, the first (an IF, the signal that I want to measure) at 100MHz/-61dBm and the second is a 4,58GHz/-45dBm (LO).
I don't succeed to do the PN measurement on the 100MHz signal. If I adjust manually the frequency of the carrier in the PN panel, I get a message which tell me " carrier incorrect or mising".

If I use the auto-tune function, the MXA catch the 4,58GHz signals. Auto-tune function catch the highest level signal ? How to measure the PN of my 100MHz IF ?

Thank you,
Best regard,