Unruh wrote: [] > The nmea is virtually useless for accurate timing. The main thing that > the unit gives you is the PPS. You have to makes sure you do not > degrade it.
The GPS 18x LVC only claims an accuracy of one microsecond for PPS in the first place. The RS-232 receivers may well have some filtering limiting the risetime to a couple of microseconds (i.e. good enough for the maximum baud rate, typically 115,200 baud), so even if the final risetime after the cable is a microsoecond or so, that's not going to degrade the accuracy signifcantly for normal use. Not an issue. >>> I'm not sure whether the NMEA driver attempts to send anything /to/ >>> the > > Which NMEA driver? The one in NTP, which would work with the GPS 18x LVC. David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
