Frequency, communication speed and 1PPS accuracy

[Jean-Michel Pouré - GOOZE]

Dear friends,

We are testing different GPS chips for an NTP statum-1 server.

Just a simple question: does frequency and communication speed improve
the quality of 1PPS signal?

We have the choice between:
1Hz, 9600bps, NEMA output: GGA, GLL, GSV, GSA, RMC, VTG.
5Hz, 57600bps, NEMA output: GGA, GLL, GSV, GSA, RMC, VTG.
10Hz, 115200bps, NEMA output: GGA, GLL, GSV, GSA, RMC, VTG.

Kind regards,
Kellogs

[Greg Troxel]

Post by Jean-Michel Pouré - GOOZE
We are testing different GPS chips for an NTP statum-1 server.
Just a simple question: does frequency and communication speed improve
the quality of 1PPS signal?
1Hz, 9600bps, NEMA output: GGA, GLL, GSV, GSA, RMC, VTG.
5Hz, 57600bps, NEMA output: GGA, GLL, GSV, GSA, RMC, VTG.
10Hz, 115200bps, NEMA output: GGA, GLL, GSV, GSA, RMC, VTG.

You should read the manual for your device or ask the manufacturer.
Failing that, you should tell us the model information, because
answering a general question about an ensemble of devices is not possible.

But, it is highly unlikely that the serial speed will significantly
change the 1 PPS behavior. If it does, I'd be skeptical of the device
entirely.