[time-nuts] OCXO Phase Noise Measurement in Primitive Conditions
bob at evoria.net
Wed Aug 27 13:01:19 EDT 2014
I have my GPSDO developed well enough now that I'm correcting for the quantization error given by my LEA-6T. As I watch the phase difference plot, it seems a bit more noisy than it should be. I've also had to make the DAC pretty active to keep the phase noise on a short leash. So, I'm wondering what I have around here that I can use to measure the phase noise of my OCXO.
For test equipment I have:
My ex-telecom Rb that I turned on last night showed poor frequency stability over night, so I'm going to let it bake for a day or two to see if that improves.
An HP 10811 standard in my 5335A, and the 5335A itself to measure time interval. I have GPIB and I can capture the TI from the 5335A.
An ADR-291 Voltage Reference to lock the EFC of the OCXO to a known value.
My thought was to begin by locking the DAC to a single value and plot an ADEV against the Rb. Is there anything else I can do with this somewhat primitive time lab?
Bob - AE6RV
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