I just proved my memory isn’t what it used to be. My unit is a GPStat Frequency Measurement System, Model 345-200. Not a GPStar as I thought. I just dug it out and the label on the bottom says input +5, +12V 3W. I’ll dig into it later as I have another dig to do - 35’ trench 6” wide, 18” deep for power to a utility building.
Steve > On Jun 5, 2020, at 9:10 AM, paul swed <[email protected]> wrote: > > Steve and yet another GPStar. > My units are older and just GPStar by Odetics and use ocxo. > These old units actually had external down converters that are quite > complicated but nicely done. > The din plug was +5 and +12. 2 pins for each plus grounds. > Yours may be different if newer. But as you guessed really easy to figure > out. > Regards > Paul > WB8TSL > >> On Fri, Jun 5, 2020 at 10:03 AM Steve - Home <[email protected]> wrote: >> >> I have a GPStar that hadn’t been used in a few years. I’ve misplaced the >> wall wart power supply. Could someone pass along the output voltage and >> current numbers of the wall wart, please? I think I can figure out the DIN >> connector pin numbers but that would be helpful, too. My manual is pretty >> sparse in that area. If I recall it says “plug in the AC adapter”... >> >> Thanks! >> >> Steve K. >> WB0DBS >> >> >> >>>> On Jun 4, 2020, at 10:00 PM, paul swed <[email protected]> wrote: >>> >>> Somebody else actually has a GPStar (Odetics) and working? >>> My units stopped working about 4 months ago. They are circa 1994 as I >>> recall. Had 2 neither would work. Have one now as I used the case and >> rack >>> mounts for another project. >>> These are much older then what you have as the GPS receiver is actually >>> discreet components. >>> Regards >>> Paul >>> WB8TSL >>> >>>> On Thu, Jun 4, 2020 at 8:59 PM Bruce Lane <[email protected]> >>>> wrote: >>>> >>>> After many moons, my trusty GPStar 365 (updated to a 565 through >>>> firmware and a receiver change) finally bit the dust. Symptom: It kept >>>> flipping between 'Coasting' and 'Recovering,' never quite reaching >>>> 'Locked.' The DAC value either ended up maxed (65534) or min'd (00000). >>>> >>>> Contacted Tim Gavin at Zyfer-FEI for advice. Strongest >> possibility: >>>> OCXO went south. Tried manually setting the DAC for mid-point (32768) >>>> and manually tweaking the coarse tuning on said OCXO against a >>>> known-good 10MHz source of equal precision (translation: Another GPSDO). >>>> >>>> Didn't work. Tried replacing the OCXO itself, and doing the >>>> alignment >>>> trick. Still no joy. >>>> >>>> Considering the lack of schematics: Emit large sigh, put unit >>>> aside, >>>> start searching Ebay for replacement. >>>> >>>> Found a late-model (black case) 565-310 for a reasonable price, >>>> bought >>>> it. Arrived a week later (yesterday at work). Opened it up, delighted to >>>> find I got a better deal than I thought in that the thing's got a >>>> rubidium module (FE-5650A to be exact). >>>> >>>> Did initial power-up/burn-in test with a local GPS antenna; Unit >>>> went >>>> to TFOM 4 and 'Locked' within a half-hour and stayed that way all day, >>>> DAC number just slightly above mid-point. >>>> >>>> However -- Date way off due to outdated Motorola UT+ receiver >>>> module. >>>> Replaced said UT+ with the M12M drop-in module from Synergy GPS. Fired >>>> up -- and got NO satellite tracking ID's! >>>> >>>> Mutter something vulgar. Do more poking around. Suddenly realize >>>> the >>>> firmware in the replacement 565 is at 1.06, while my original unit was >>>> at 1.08. "I wonder if..." >>>> >>>> Swap 1.08 firmware chip into replacement 565. Power on. Goes >>>> through >>>> factory reset -- and comes up perfectly normal! Sat numbers appearing on >>>> tracking report. Just checked it a moment ago (about 15 minutes after >>>> initial re-power) and it's at TFOM 4 / Locked! And it stayed that way >>>> through a 24-hour burn-in check. >>>> >>>> Conclusion: In the 565 series, you need version 1.08 firmware to >>>> support Motorola's M12, or similar replacements. >>>> >>>> And I'm still amazed I lucked out with the rubidium module. ;-) >>>> >>>> Keep on tickin'... >>>> >>>> -- >>>> --- >>>> Bruce Lane, ARS KC7GR >>>> http://www.bluefeathertech.com >>>> kyrrin (at) bluefeathertech dot com >>>> "Quando Omni Flunkus Moritati" (Red Green) >>>> >>>> _______________________________________________ >>>> 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. >> >> >> _______________________________________________ >> 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. _______________________________________________ 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.
