David J Taylor wrote: > "David Lord" <> wrote in message news:[email protected]... >> David Lord wrote: >>> David J Taylor wrote: >>>> OT: GPS18x LVC failure >>>> >>>> My GPS18x LVC stopped working a couple of days ago. There appears >>>> to +5V going into the unit, and the serial output is stuck around >>>> -5V with no signs of data on the 'scope. Garmin have accepted the unit >> >> I'm guessing you hit (-) rather than (+), otherwise something >> odd as with my unit the supplies are +5V and 0V, output spec >> is 0V to +5V. Where was the -5V generated? If the -5V was real >> then it would indicate some sort of internal fault. >> >> David > > Yes, David, I meant minus rather than plus. It was on the serial output > lead, unloaded, what I would call TX data. Checked with a 'scope rather > than a meter as I was looking for data. Just checked, and the Invert > Channel switch was not set. Possible I made a mistake. You are quite > correct on the specs, though.
I never scoped mine but it did give a very poor ntp output by one of usb-serial I tried (nowhere near that without pps using serial port on server and much worse than you reported for yours using usb and Windows) and I had no output at all with other usb-serial I tried (that works ok connected to a modem) but was ok when connected back to serial port of server. I've just checked stats on server via serial port for reach !=377 and from 700+ it's < 20, which includes lack of sat's in view and INIT. My stats are at 30min so for radioclocks only catches about 25% when polled at 64s. David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
