[time-nuts] PRS-45 Cs Standard

Bob Camp kb8tq at n1k.org
Mon Dec 1 18:54:00 EST 2014


For an eBay transaction, one year warranty is pretty amazing. Based on the pictures of the unit, it’s not all that old. 


> On Dec 1, 2014, at 12:27 PM, Bob Stewart <bob at evoria.net> wrote:
> Hi Paul,
> Well, he's offering a 1 year guarantee, so I suppose that means this is a 9 year old unit.  Fair enough, I guess.  Hopefully I'll finally be able to get a handle on where my GPSDO development stands without having to wonder about the GPSDO I'm testing against.
> The document I have says that it uses redundant external power sources.  I take that to mean that I can safely supply only one side and be fine?
> Bob
>      From: Poul-Henning Kamp <phk at phk.freebsd.dk>
> To: Bob Stewart <bob at evoria.net>; Discussion of precise time and frequency measurement <time-nuts at febo.com> 
> Sent: Monday, December 1, 2014 11:15 AM
> Subject: Re: [time-nuts] PRS-45 Cs Standard
> --------
> In message <1290866031.3259250.1417452840614.JavaMail.yahoo at jws10610.mail.bf1.y
> ahoo.com>, Bob Stewart writes:
>> I've just won a "Symmetricom / Datum PRS45A PRS45-0001K - Single
>> Cesium PRS-45 DS1" on ebay from a guy in the Netherlands.
> As far as I know it is the cheapest Cs ever produced and it is
> specifically targeted at telecoms where no GPS signal is, can
> or will be made available.
> It's main advantage over rubidium is the lack of drift, so you can
> mount it, power it, push the button and as long as the light is lit
> (10 years guaranteed) you have a good sync clock for your telco
> network.
> -- 
> 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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