Many older GPS units sending NMEA at 4800 baud will in effect indicate one second slow, either all the time or some of the time, if there are too many GPS sentences turned on. There's too much data in the queue. Either drop the number of sentences enabled, or increase the baud rate, or both.
Another source of delay is the computer. It may take up to a second for the serial data to get to the screen from the com port. Try a different computer and/or terminal program. The best source of time is of course the 1pps pulse, but you still need to know which UTC second each one refers to! 73, Murray ZL1BPU _______________________________________________ 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.
