[time-nuts] UCCM GPSDO

ziggy9+time-nuts at pumpkinbrook.com ziggy9+time-nuts at pumpkinbrook.com
Tue Dec 6 00:44:12 EST 2016

Well, that actually helped a little. I dug a little further into the system documentation, and while there is only a smattering of information on the UCCM itself, I was able to find that the alarm parameters for them dictate a 5.2-5.8v supply range, so THAT finally definitively answers one of the things that’s only been guessed at before. I also found a statement of ‘Stability: .02 ppm’, with no other qualification. If I find anything more of interest I’ll post it.


> On Dec 5, 2016, at 12:58 PM, Ed Palmer <ed_palmer at sasktel.net> wrote:
> The UCCM modules came from Samsung WiMAX radio systems.  It looks like they OEM'd the boards from both Trimble and Symmetricom.  "UCCM = Universal Core Clock Module"  UCCM-P = "Universal Core Clock Module - Plus".  I managed to find a system description document that mentions it two or three times.  No details, though.
> Ed
> On 2016-12-05 11:00 AM, Larry McDavid <lmcdavid at lmceng.com> wrote:
>> Does anyone know the origin of the "UCCM" designation for the Trimble
>> GPSDO boards recently popular here?
>> Is "UCCM" a valid model number, is it an acronym or is it something else?
>> I've packaged several of these Trimble boards and I've seen about four
>> others, none of which was marked "UCCM." I've seen one on-line picture
>> of a packaged board that shows a separate label with "UCCM" marked.
>> GPSCon already supports these "UCCM" boards and the next release of Lady
>> Heather is expected to support them also, so there is some acceptance of
>> this "UCCM" designation. But, what is the origin of this term and is it
>> valid?
>> -- Best wishes, Larry McDavid W6FUB Anaheim, California (SE of Los Angeles, near Disneyland)
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list