[time-nuts] Best Rubidium Frequency Standard
Bob Camp
kb8tq at n1k.org
Sun Mar 13 12:22:56 EDT 2016
Hi
Even if they do take the correction, do they want it before or after the PPS comes along? If you have a destination device that wants it before the pps and a GPS that gives it to you after the PPS … that’s a bit of a problem.
Bob
> On Mar 13, 2016, at 12:07 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
>
> --------
> 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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