[time-nuts] GPSDO control loops and correcting quantizationerror

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Sep 16 06:24:16 UTC 2012


In message <5C1BBD844F6145969FE8A4785FEE490A at pc52>, "Tom Van Baak" writes:

>Has anyone on the list done work optimizing the timing accuracy rather than
>the frequency stability?

Yes, timing accuracy has been my main focus and in general I have been
using integration times on the low side of 10000 seconds for that,
but it depends a lot on the OCXO/Rb and environment.

The PLL in NTPns is a (by now) old attempt to make a self-tuning PLL
for optimal time stability, and it does a surprisingly good job at it.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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