[time-nuts] Re: Do time nuts only use and measure 10MHz clocks?

[zfe]

Do you know Andrew Holme's phase noise project:
http://www.aholme.co.uk/PhaseNoise/Main.htm
There it is possible that the DUT and references have different
frequencies up to a factor 4. Even differnt frequencies for the two
references would be possible, but that is not yet implemented (it would
need a second NCO in the FPGA - I did ask for that in a future version
of the software).

I measured clocks for audio puposes (24.576MHz, resp 22.5792Mhz and
multiples). My OCXO with best close-in phase noise have 16.384MHz. So
this freedom in choice of frequencies is very helpfull.

Am 06.10.22 um 17:10 schrieb Erik Kaashoek via time-nuts:
> In a DMTD one can use one clock send to both mixer for measuring very
> accurately  the frequency/phase difference of two clocks at roughly the
> same frequency.
> One can also imagine having two different clocks derived from the same
> reference, one for each mixer, enabling the measurement of two very
> difference clocks (such as 10MHz and 1, 5 or 100MHz) with hopefully
> equal accuracy and without having to use external dividers.
> Is this for time nuts a relevant use case?
> If yes, what other frequencies besides 10MHz (and 1PPS) are used?
> Erik.
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