[time-nuts] Datum 102500-001 rubidium standard

[Matthias Welwarsky]

On Mittwoch, 17. Juni 2020 22:39:38 CEST Rick Commo wrote:
> I was given a Datum 102500-001 Rubidium standard today.  Searcing the Web
> for a manual for this particular model yielded nothing but I did run across
> a manual in PDF form for their LPRO unit.  I read through  and suspect that
> it might be more or less applicable to the unit I have.  At least the
> connector has the same number of pins and layout.

It's an LPRO-101 under a different label. I have a similar one, Datum 
102589-001, a sticker on the side reads. 

> Does anyone on the list have more info on this unit that you can share with
> me.  I grabbed it up because it was free and came with a 24V switching
> supply.  As I find time I want  to build a GPSDO for my ham shack; but this
> could serve in the interim.

If you open up the cover (can be done with removing the two front screws and 
then gentle pulling of the contact plug), you'll see that the inside matches 
exactly the LPRO-101 manual that's floating around on the web.

> The current extent of my knowledge of these devices is knowing how to spell
> rubidium and that they are/were used as secondary time sources.  I will be
> doing research over the next few days trying to come up to speed; but any
> advice from the hive-mind of this group will be appreaciated.

There's not much to it. Just connect the 24V supply and after a couple of 
minutes you'll have a stable 10MHz sine output on the respective pin. You 
could check the lamp voltage to be in the expected range but that's about it.

BR,
Matthias

> 
> Cheers & thanks,
> -rick, K7LOG
> 
> 
> 
> 
> 
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