Technical information

For the synchronization of the NTPD with the GPS it is necessary that the GPS

receiver is synchronous with the GPS time. In this case the following message is

monitored on the display:

The second line shows the user that the NTPD is synchronized with the GPS with an

offset of -50us. Because of the internal time of the NTP which is adjusted by a

software PLL (phase locked loop) it takes a certain time to optimise this offset. The

NTPD tries to keep the offset below ±128 ms; if the offset becomes too large the

system time is set with the GPS time. Typically values for the offset are +-5 ms after

the NTPD has already synchronized.

GPS: NORMAL OPERATION Mon, 28.08.2006

NTP: Offset PPS: -50us UTC 14:33:10