[time-nuts] New Subscriber, DIY GPSDO project (yes, another one)
Poul-Henning Kamp
phk at phk.freebsd.dk
Sun Mar 8 15:53:29 UTC 2020
--------
In message <5f5e8822-006f-a059-51f8-d6a986300811 at earthlink.net>, jimlux writes:
>The conceptual idea being similar to setting a PLL Loop filter bandwidth
>such that the reference noise (multiplied up) and the VCO noise are the
>same at that point?
I tried that, and got absolutely no where, because the noise-spectra
are not flat or even comparable.
Instead started to look at the time distribution of the zero-crossings
of the residual low-pass filtered phase error, and that has given me
much better results all in all.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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