Meinberg LANTIME M600 Technical Information download pdf (Page 93)

CLI NTP Parameter

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.

Because the GPS 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

available by using the ATOM driver of the NTP subsystem, which is directly

interpreting the PPS (pulse per second) of the GPS reference clock. The default

configuration looks like this:

# *** lantime ***

# NTP.CONF for GPS167 with UNI ERLANGEN

server 127.127.1.0 # local clock

fudge 127.127.1.0 stratum 12 # local stratum

server 127.127.8.0 mode 135 prefer # GPS167 UNI Erlangen PPS

fudge 127.127.8.0 time1 0.0042 # relative to PPS

server 127.127.22.0 # ATOM (PPS)

fudge 127.127.22.0 flag3 1 # enable PPS API

enable stats

statsdir /var/log/

statistics loopstats

driftfile /etc/ntp.drift

# Edit /mnt/flash/ntpconf.add to add additional NTP parameters

1 2 ... 88 89 90 91 92 93 94 95 96 97 98 ... 150 151

No comments

Meinberg LANTIME M600 Technical Information Page 93