[time-nuts] Timepod Phase Noise Measurements and 3 corner hat
bruce.griffiths at xtra.co.nz
Sun Aug 30 15:45:20 EDT 2015
On Sunday, August 30, 2015 05:06:38 PM James Flynn wrote:
> 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
> > 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
> the DUT.
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How can one have any faith in a paper that cant even get the
fundamentals of resistor noise correct?
It also perpetuates the myth that Ulrich Rodhe cofounded Rodhe and
Lothar Rodhe (Ulrich's father I believe) cofounded Rodhe and Schwarz.
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