On Sunday, August 30, 2015 05:06:38 PM James Flynn wrote: > Martyn Smith <martyn@...> writes: > > MEASUREMENT TECHNIQUE > > > > We have three sources close in frequency (within 1 x 10E-8 of each > > other). > > > 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. > > http://publications.npl.co.uk/npl_web/pdf/mgpg68.pdf > > 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. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the > instructions there. 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 Schwarz. Lothar Rodhe (Ulrich's father I believe) cofounded Rodhe and Schwarz.
Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
