[time-nuts] Re: help reviving Trimble UCCM-LPS GPSDO

[Wilko Bulte]

> On 23 Dec 2021, at 18:58, Attila Kinali <attila at kinali.ch> wrote:
> 
> On Thu, 23 Dec 2021 12:14:48 -0500
> Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>> It’s a pretty good bet that the Vref is 5V
> 
> A quick google lead me to this forum post:
> https://www.eevblog.com/forum/projects/a-look-at-my-symmetricom-gpsdo-(ocxo-furuno-receiver)/1325/
> 
> Looks like the Vref is supposed to be 2.5V

For the Symmetricom UCCM or for the Trimble?

These UCCM are form-fit-function compatible but that does not mean the circuits are the same. Or the OcXO. 

Samsung also produced UCCM, of which I have 2, both working fine. Again different circuits, different GPS etc. 

Wilko
> 
>            Attila Kinali
> -- 
> The driving force behind research is the question: "Why?"
> There are things we don't understand and things we always 
> wonder about. And that's why we do research.
>        -- Kobayashi Makoto
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