Hal Murray wrote: > I've got a couple of GPS units that use the SiRF chips feeding NTP. I was > looking for low cost units for time keeping. They don't work very well. The > time offset of the NMEA message wanders/jitters by about 100 ms. I can > easily correct for a constant offset, but I can't dance around an offset that > won't hold still. (Oh, well. I tried.) >
I looked into using some US GlobalSat units for my scope clock instead of the higher-priced GPS 18 LVC. The one I tried has an RS-232 serial port. The manual refers obliquely to a 1PPS capability, but unfortunately they didn't pin out the 1PPS signal to the board connector. I guess that their market is automotive navigation or logging, so they didn't consider it worth their while to add the 1PPS signal. I got the impression that the extra $50 you pay for the Garmin receiver is money well spent on a well-engineered device. _______________________________________________ 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.
