[time-nuts] Looking for Symmetricom system info: 105542-002A

[paul swed]

Walter best to get an outside antenna. Then let it take a while to sync
maybe 48 hours.
With everything missing and suspecting an older GPS they seem to have to go
through various satellites trying one at a time.
Some interfaces allow you to tell the system what satellite prn to look
for. The date and time can be added to help but actually doesn't have to be
correct to start. The trick is the system needs 1 satellite to download the
almanac.
Most likely there was also a battery in the gps receiver thats dead. Good
to replace it and the system can remember the details.
Regards
Paul
WB8TSL

On Fri, Sep 6, 2019 at 8:00 PM Walter Shawlee 2 <walter2 at sphere.bc.ca>
wrote:

> I recently got a rack shelf filled with Symmetricom black modules (PMM
> controller w/LCD display, GPS, PRS-RB Rb oscillator and PRS-XO ovenized
> crystal oscillator). the whole rack has an assembly number 105542-0002A,
> but searching by any of the module or assembly numbers doesn't reveal
> much. I had similar bad luck trying to find info on my Ball-Efratorm rack.
>
> Is there any archive for this info? the transition from symmetricom to
> microsemi seems to have killed all legacy information. My GPS does not
> seem to be working yet (attaching an amplified 26dB antenna made the
> fault light go out, but still no satellites acquired with an indoor
> antenna). it does roll-over correctly to the Rb, and that is very
> accurate, and presumably if that fails it will roll-over to the ovenized
> oscillator. the rear has a forest of distribution jacks for timing
> signals, and dual power supplies, it will run from either one or both.
>
> I am happy to send pics to anybody for better identification if that can
> help location of manuals. I'd really like to know what data is provided
> via the serial ports, and any data on the correct GPS antenna.  my LCD
> display says the system is warming up, and so far no vehicles detected
> even after an hour. Have to try my external antenna next.  it also
> reports bad almanac data, and the wrong date in 2017, so clearly it has
> not successfully acquired any good data.
>
> great looking and working hardware, so I'd like to get as much
> functionality out of it as I can as a bench frequency standard.
>
> any help appreciated.
> all the best,
> walter
>
> --
> Walter Shawlee 2
> Sphere Research Corp. 3394 Sunnyside Rd.
> West Kelowna, BC, V1Z 2V4 CANADA
> Phone: +1 (250-769-1834 -:- http://www.sphere.bc.ca
> +We're all in one boat, no matter how it looks to you. (WS2)
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