In message <34d5c3ce-6b3d-4944-996a-7637373b2...@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
p...@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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