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

Alexander Sack pisymbol at gmail.com
Mon Dec 7 22:49:32 UTC 2009


On Mon, Dec 7, 2009 at 5:20 PM, Bruce Griffiths
<bruce.griffiths at xtra.co.nz> wrote:
> 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.

Yeah I'm running FBSD (actually that's my day job).  What's the
M12+T/M12M, is that a Motorola substance?  Linky-link?

-aps



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