[time-nuts] Chooses for a desktop/server NTP external 1PPS reference

Bruce Griffiths bruce.griffiths at xtra.co.nz
Mon Dec 7 22:20:08 UTC 2009


Alexander Sack wrote:
> Hi Everybody:
>
> First post, be gentle.  I did some mail-list archive searching and it seems
> that a lot of folks have used the Garmin 18x LVC as their 1PPS sync for the
> desktop with varied success (5V via USB port and RS-232 for 1PPS?).  At
> work, I have experience with an Endrun Cf/Ct receiver connected to a small
> CDMA antennae (as well as GPS receiver) which works pretty well (I suppose
> its more relative to my crappy motherboard oscillator than anything).  I
> have no idea how much they run (I think the CDMA one was like $200 and
> something).
>
> What are my options in this realm?  Surprisingly enough, Googling for over
> an hour didn't yield much results.  There are tons of companies that offer
> various solutions but with little pricing information.  I'd be happy to hear
> some suggestions OTHER THAN the Garmin 18x LVC?
>
> (btw is there such a thing as a desktop rubidium atomic clock with 1 PPS?)
>
> Thanks!
>
> -aps
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>    
A Soekris 4501 running nanobsd using an M12+T or M12M GPS timing 
receiver works very well.
Failing that an M12+T or M12M GPS timing receiver also works well with a 
desktop machine that runs FreeBSD.

Bruce




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