Note that on a lot of GPS devices that only one edge of the 1PPS pulse is stable and the other edge can jitter a bit.
Also, you might want to try programming the PPS to a 50% duty cycle (but having an asymmetrical PPS pulse might have some advantages for post processing). The receiver with the best 1PPS stability that I have tested is the Furuno GT-8736. Its typical span is under +/- 4ns from nominal. _______________________________________________ time-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.