If there is a problem in the RF front-end, no software can report this... actually the only way to test the radio section of a GPS receiver is to just connect it to an antenna (unless there is a GPS simulator available).
On Sat, Jan 9, 2016 at 2:49 AM, Michael Bauer <mjbaue...@gmail.com> wrote: > My subj Nortel Trimble GPSTM had been working well for about two years. > Changed QTH by about 20 miles, reconnected with same power supply, coax and > antenna. Cannot see any GPS satellites or 10 mHz output (9.8MHz on 8X Chip > is present and front panel LEDs show the unit responding to software > commands as before). > > Lady Heather and tboltmon both report ROM, RAM, OSC, POWER, EEPROM and > ANTENNA OK thru RS-232 interface. Replaced bullet antenna anyway - no > change. 5VDC present at antenna and it draws about 33 mA. Other local GPS > devices (two vehicles and one EarthMate) achieve 3D fixes from ground level > antennas. Performed warm, cold and hard resets (erasing former GPS > position), min elevation set at 15 degrees. Survey starts, but doesn't > proceed. All eight satellite status lines show yellow and zero's across. > Undisciplined, No GPS time, no Posn. Start date is reported as 07 April > 2019 week 2048. > > The unit performed flawlessly at previous QTH frequently showing good > signals from 7-8 GPS satellites. What happened? Do I have a broken box > that cannot be detected by software control/reporting programs? > > Thanks in advance for any ideas. > > 73, > > Mike - W7GW > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.