Hi Both GPSDO’s were *sold* to Nortel. Neither one was made by them. The two vendors that you most commonly see popping up on eBay are Symmetricom ( now Microchip) and Trimble. There may have been other vendors as well.
If you are looking for schematics and block diagrams on any surplus GPSDO or OCXO or Telecom Rb, good luck. Unless a Time Nut has traced out the internals it is very unlikely they exist. Manufacturers stopped putting that sort of stuff out decades ago for a variety of reasons. Bob > On Sep 29, 2019, at 6:54 PM, Taka Kamiya via time-nuts > <[email protected]> wrote: > > I am looking for any documentation for Nortel branded GPSDO called GPSTM. > What's confusing is there are at least 2 kind with exactly the same name! I > need one made by Symmetricom. Model number is NTBW50AA-22. > > Ones made by Trimble are all over the Internet, alone with documentation. > That is NOT what I am looking for. It has to be Symmetricom. > If anyone can help me out, I'd be very grateful. > > --------------------------------------- > (Mr.) Taka Kamiya > KB4EMF / ex JF2DKG > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
