[time-nuts] [?? Probable Spam] Comparison of two clocks

Ulrich Bangert df6jb at ulrich-bangert.de
Thu Sep 8 04:50:06 EDT 2011


Ilja,

since I guess you read German I would like to draw your attention to my
paper

http://www.ulrich-bangert.de/AMSAT-Journal.pdf

which will have answers for a lot of questions that you currently seem to
tackle with.

Best regards
Ulrich

> -----Ursprungliche Nachricht-----
> Von: time-nuts-bounces at febo.com 
> [mailto:time-nuts-bounces at febo.com] Im Auftrag von Ilja Gerhardt
> Gesendet: Donnerstag, 8. September 2011 05:36
> An: time-nuts at febo.com
> Betreff: [?? Probable Spam] [time-nuts] Comparison of two clocks
> 
> 
> Hi time nuts -
> 
> I am new to the list and have a trivial question on the 
> comparison of two clocks: In principle it might be very easy 
> to simply monitor the relative phase-shift of two sine 
> outputs of two clocks, e.g. of two 10MHz outputs.
> 
> For this, it would be ideal to have a very high frequency, 
> such as a phase-locked 1GHz signal. Does anyone have a 
> reference to a circuitry, which implements a phase-locked 
> up-converted signal?
> 
> But, I guess there are better ways to compare two clocks - I 
> recall a setup where two clocks are referenced to a third, 
> similar frequency signal (which might even have phase-noise 
> and such) on two mixers. Then the two outcomes are compared. 
> Does anyone have a good reference/ paper to a comparison of 
> clock-comparison possibilities?
> 
> Best Regards from the PST
> 
>               Ilja
> 
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