[time-nuts] PRS-45 Cs Standard

Magnus Danielson magnus at rubidium.dyndns.org
Wed Dec 3 19:38:51 UTC 2014


Hi Bob,

The manual is in your inbox.
It also describes a DS1 interface, which should be interesting to know 
what the odd telecom signals is about. :)

Cheers,
Magnus

On 12/02/2014 01:40 AM, Bob Stewart wrote:
> Thanks Magnus,
> I'll look around to see what I can find for FTS manuals.  If I know the interface messages, I can certainly write the software.
> Bob
>
>        From: Magnus Danielson <magnus at rubidium.dyndns.org>
>   To: time-nuts at febo.com
> Cc: magnus at rubidium.se
>   Sent: Monday, December 1, 2014 3:08 PM
>   Subject: Re: [time-nuts] PRS-45 Cs Standard
>
> Hi Bob,
>
>
>
> On 12/01/2014 05:54 PM, Bob Stewart wrote:
>> I've just won a "Symmetricom / Datum PRS45A PRS45-0001K - Single Cesium PRS-45 DS1" on ebay from a guy in the Netherlands.  It's listed as used in good working condition, so ebay should protect me if it's not.  Hopefully he has the training to get it to me.
>>
>> It seems to also be known as a "TImeCesium".  I've been looking around on the internet, and I don't find a lot of information on these other than the user document on N4IQT's site.  Is anyone using one of these, and do you have the software for it?
>
> I bet it has the same cesium platform as my Telecom Solutions, and then
> the FTS-4065 software on the RS-232 port should be exactly what you want.
>
> PRS = Primary Reference Source - the ANSI SONET term which is also
> associated with Stratum 1. The two DS1 outputs is means to feed the
> PDH/SONET network in the 1,544 Mb/s hierarchy.
>
> I had a tool for pulling that datastream out of it, but it was relative
> easy to write a tool from the FTS manual as I recall it, but I never got
> around to do it. You do want to record the output of the RS-232 to a
> log, so you can monitor the state of it and see how it behavves.
>
> Cheers,
> Magnus
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