1PPS Signal

There is a dedicated 1PPS signal available on the IO Connection. See the Advanced section of the Configuration Menu for information on changing 1PPS and GPIO settings, and see Dynamic Pin Functions for information on 1PPS and GPIO output voltage.

The 1PPS signal reference ground is the GPIO ground domain. See Electrical Domains for more information.

The signal is normally low and pulses high for 100 milliseconds to signal the precise second, which starts on the rising edge of the signal.

This dedicated 1PPS signal is the recommended 1PPS signal to use as it is more accurate. The validity of this 1PPS signal can be monitored using the time initialised status flag.