[time-nuts] PRS-45 Cs Standard

Poul-Henning Kamp phk at phk.freebsd.dk
Mon Dec 1 12:15:07 EST 2014

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

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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