Thanks for your reply I don't think it's a computer problem because I can see the GPS is not locked when I compare the 10 MHz output with a Rubidium. By the way, I don't use software but the screen command under Linux.
Maybe the motorola bord is dead, I will investigate this : I have to send commands directly to the board, as suggested by someone offlist. The board in the GPSDO is a Motorola 84D43579M03 . The same as this one : http://www.ebay.com/itm/HP-Z3801A-Z3805A-GPS-Module-Motorola-Oncore-P-N-84D43579M03-/161594138402?nma=true&si=jnWr5n2KQf1WL6JylF%252BMgtIr1%252FM%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557 Do you think it can be replaced by this one : http://www.ebay.com/itm/Z3801A-Z3805A-GPS-Receiver-VP-oncore-B4121Z1116-/281670591394?hash=item4194e023a2 Thanks Claude ----- Mail original ----- De: "Artek Manuals" <[email protected]> À: "Discussion of precise time and frequency measurement" <[email protected]> Envoyé: Jeudi 28 Janvier 2016 00:27:43 Objet: Re: [time-nuts] 58503A does not track Claude Are you using the same software on the same computer platform for the whole time? By example I have a Z3801 which works sometimes under Z38xx and sometimes not, while SATSTAT works all the time. I did find some flaky things going on with the software and was finding that I had to close Z38xx and reopen it after every command to change something? Dave On 1/26/2016 11:39 AM, [email protected] wrote: > Hello list ! > > I have a HP 58503A who worked fine for two years. > After a short power cut, it does not lock on GPS. I tried some commandsn > including :SYST:PRESET but nothing works > > Here's a :SYSTEM:STATUS ? after the PRESET and after waiting a few hours : > > > ------------------------------- Receiver Status > ------------------------------- > > SYNCHRONIZATION ........................................... [ Outputs Invalid > ] > SmartClock Mode ___________________________ Reference Outputs > _______________ > Locked TFOM 9 FFOM > 3 > Recovery 1PPS TI -- > Holdover HOLD THR 1.000 us >>> Power-up: GPS acquisition Holdover Uncertainty ____________ > Predict -- > > ACQUISITION .............................................. [ GPS 1PPS Invalid > ] > Tracking: 0 ____ Not Tracking: 6 ________ Time > ____________________________ > PRN El Az UTC 16:06:43 [?] 29 Feb > 2016 > * 1 -- --- GPS 1PPS Invalid: not tracking > * 6 -- --- ANT DLY 0 ns > * 9 -- --- Position > ________________________ > *14 -- --- MODE Survey: 0% > complete > *22 -- --- Suspended: track <4 > sats > *24 -- --- INIT LAT N 596:30:43.423 > INIT LON E 596:31:10.845 > ELEV MASK 10 deg *attempting to track +21474708.00 m > (MSL) > HEALTH MONITOR ......................................................... [ OK > ] > Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK > > I tried to set the date with :GPS:INIT:DATE 2016,01,26 but this command has > no effect. > > Setting the LAT and LON with :GPS:POS «myposition» works. > > ------------------------------- Receiver Status > ------------------------------- > > SYNCHRONIZATION ........................................... [ Outputs Invalid > ] > SmartClock Mode ___________________________ Reference Outputs > _______________ > Locked TFOM 9 FFOM > 3 > Recovery 1PPS TI -- > Holdover HOLD THR 1.000 us >>> Power-up: GPS acquisition Holdover Uncertainty ____________ > Predict -- > > ACQUISITION .............................................. [ GPS 1PPS Invalid > ] > Tracking: 0 ____ Not Tracking: 6 ________ Time > ____________________________ > PRN El Az UTC 02:58:13 [?] 24 Mar > 2016 > * 3 -- --- GPS 1PPS Invalid: not tracking > * 4 -- --- ANT DLY 0 ns > * 8 -- --- Position > ________________________ > * 9 -- --- MODE Hold > *23 -- --- > *29 -- --- LAT N blah blah > LON E blah blah > ELEV MASK 10 deg *attempting to track HGT +194.57 m > (MSL) > HEALTH MONITOR ......................................................... [ OK > ] > Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK > > > But the unit is still not tracking, it sees the birds because the PRN are > changing but > does not calculate the "El" and "Az" ... > > Here is the output of :DIAGnostic:LOG:READ:ALL? > > Log 001:20160122.00:00:00: Log cleared > Log 002:20160122.00:00:00: System preset > Log 003:20160122.00:00:35: Self-test failed > Log 004:20160122.00:12:38: Position hold mode started > > As you can see, the date is 2016-01-22, it's the date when the power cut > happened . > > And when I run :GPSYSTEM:POSITION:SURVEY ONCE, I get the same first status > with crazy > lattidude and longitude. > > > Finally a self test *TST? gives +0 and the ALARM LED and the LOCK LED are off. > > I've tried with a second antenna and have the same problem :-( > > Can someone give me an advice for this problem ? The receiver looks dead, no ? > > Thanks in advance, > > > Claude > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Dave [email protected] www.ArtekManuals.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
