[time-nuts] Timepod Phase Noise Measurements and 3 corner hat
james.flynn at csun.edu
Sun Aug 30 13:06:38 EDT 2015
Martyn Smith <martyn at ...> writes:
> MEASUREMENT TECHNIQUE
> We have three sources close in frequency (within 1 x 10E-8 of each
> Two sources are connected to the Ch0 and Ch 2 inputs of the timepod, the
> unit under test to the ref input.
> According to John, the result will be the actual phase noise of the ref
> input, even if it is lower than the two other sources.
> No further calculations need to be made.
The is a publication by the NPL that talks about a similar technique, but
comes to a somewhat different conclusion.
Bottom line: it holds that the phase noise of all three sources can be
determined if they are taken two at a time; one as ref and the other as
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