[time-nuts] Best Rubidium Frequency Standard

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Mar 13 12:07:04 EDT 2016


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In message <1e2b85.da47c0.4416d1a1 at aol.com>, KA2WEU--- via time-nuts writes:

>what is wrong with   the Standford Research  Rubidium  standard with a 1 
>sec sync pulls form a GPS satellite ?" 

At least some of the firmware versions do not allow you to change the
PPSIN offset second by second, so you cannot compensate for the
"negative sawtooth", and the resulting "hanging bridges" means that
you have to us a very unoptimal PLL time constant.


-- 
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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