[time-nuts] GPSDO control loops and correcting quantizationerror

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Sep 16 20:30:08 UTC 2012


In message <34D5C3CE-6B3D-4944-996A-7637373B2857 at gmail.com>, Dennis Ferguson wr
ites:

>I'm not sure there could be a difference between the goals of
>frequency accuracy and time accuracy that would effect that time
>constant.

It does. 

A PLL more or less corresponds to an "PI" regulation, where a FLL
only needs to have the "I" term.

Because you don't have the interaction between the P and I terms,
the I-timeconstant can be longer.

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