Meinberg M900, Руководство по эксплуатации

Страница: 79 / 170

Configuration: NTP
The NTP configuration page is used to set up the additional NTP parameters
needed for a more specific configuration of the NTP subsystem.
The default configuration of the timeserver consists of a local clock, which represents
the hardware clock of your LANTIME system and the GPS reference clock. The local
clock is only chosen as the NTP time reference after the GPS clock lost its
synchronisation. The stratum level of this local clock is set to 12, this ensures that
clients recognise the switchover to the local clock and are able to eventually take
further actions. The local clock can be disabled if the timeserver should not answer
any more when the reference clock is out of order.
Because the reference clock is internally connected to the LANTIME system by using
a serial connection, the accuracy using this way of synchronisation is around 1 ms.
The high accuracy of the LANTIME timeserver (around 10 microseconds) is
79