[time-nuts] Datum PRR-10 Info

David I. Emery die at dieconsulting.com
Sat Aug 25 23:33:26 UTC 2012

On Sat, Aug 25, 2012 at 11:41:21AM -0700, J. Forster wrote:
> Hi,
> I recently picked up the Rb module from a Datum PRR-10 Precision Reference
> Receiver.
> The Rb connections are pretty obvious, but does anybody have any info on
> the rest of the module? Even a schematic would help.
> I'm trying to decide whether the PCB has anything useful on it.

	I have the whole working PRR-10 system including 2 Rbs and AFAIK
that PCB just contains redundant power and provisions for passing a
couple of status bits from the RB (lock I think)... if you have a PRR-10
system it would be useful, but I'm not sure it is otherwise.

	Possible there is a -48 volt input DC to DC converter... if it
would be useful I go go look at one of mine to refresh my memory.

	The heat sink is useful with the LPRO RB of course.

	I assume you bought it for the LPRO...

	You may not be aware, but the system is designed to use a DDS to
offset the frequency of a free running 10 MHz source to make it accurate
based on GPS timing ... so the Rb is not disciplined with its C field or
similar - it is free running.


> Thanks,
> -John
> ================
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  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
celebration of what could have been, but wasn't and is not to be now either."

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