Have PN2060A phase noise analyser, will measure

 Have PN2060A phase noise analyser, will measure!

This post is for measurements of different TCXOs I have on hand. The measurements are not too exact as I am not set up for precise measurements. However, the two reference TCXOs run on batteries and all the equipment is warmed up for at least 30 minutes. If I see an odd result I repeat it.

Before I start, the performance of the latest R&S FSPN phase noise analyser for comparison. Its noise floor is a bit lower. The plot is processed data with spikes removed, among other things, so comparable to the PN2060A data after Matlab processing.

One thing R&S stress is improved DC supplies, showing the sensitivity to power supply noise. Hence, running everything on batteries is a good idea as a cheap alternative.

The floor of the instrument is about 180 dBC/Hz. This is just above the noise from a resistor os about 184 dBC/Hz, the absolute floor.

Keysight MXA N9020A Vector signal analyser. 

As the N9020A is for analysing digital modulation, one would expect that its reference TCXO has very low phase noise. And, yes it does.