Art DTRACK3 User Manual page 99

NTP In order to activate the NTP synchronisation , select the radio button
a hostname or IP address
further information. Click
While the controller is being synchronised the message 'wait' is displayed next to the
'state' at the bottom of the dialog. As soon as the connection has been established,
the 'state' will switch to 'sync'. Additionally the quality for the connection to the NTP
server is measured by its
higher values indicating good connection quality. Furthermore the quality of the time
synchronisation of the master clock and the controller's internal clock is indicated by the
precision' in the unit milliseconds ( ¯ ms).
'estimitated
In case the connection to the NTP server is lost the 'state' will switch to 'wait' again.
PTP multicast For synchronisation with a PTP multicast master server select the radio
button PTP multicast
administrator for further information. Click
While the controller is being synchronised the message 'wait' is displayed next to the
state' at the bottom of the dialog. As soon as the connection has been established, the
'Port state' will switch to 'sync' and the IP address of the master server is shown next
to 'master '. Additionally the quality for the connection to the PTP server is measured
by 'master offset' and
quality.
In case the connection to the PTP server is lost the
PTP unicast For synchronisation with a PTP unicast master server select the radio
button PTP unicast, enter the
number setting. Please ask your system administrator for further information. Click
to activate the synchronisation.
While the controller is being synchronised the message 'wait' is displayed next to the
state' at the bottom of the dialog. As soon as the connection has been established, the
'Port state' will switch to 'sync'. Additionally the quality for the connection to the PTP
server is measured by
a better connection quality.
In case the connection to the PTP server is lost the
NTP is fully supported with Version 3 (RFC 1305), PTP is supported
according to IEEE 1588-2008.
Synchronisation with NTP or PTP servers does not affect active mea-
surements, but the timestamps of the tracking results are changed ac-
cordingly.
Synchronisation with NTP or PTP servers usually succeeds quite fast
(at least in a few seconds). Nevertheless it could be reasonable to give
the system some time for complete synchronisation.
It is highly recommended to synchronize with a local NTP or PTP mas-
ter clock rather than to a remote time server on the Internet. Otherwise
due to network latency and jitter the accuracy of the controller's clock
may be degraded too far in order to generate useful timestamps.
of your NTP server. Please ask your system administrator for
Apply to activate the synchronisation.
'reachability '. The values can range from 0% to 100 %, with
and enter the respective
Apply
'mean path delay ' with lower values indicating a better connection
IP address of your PTP server and the respective
'master offset' and 'mean path delay
domain setting. Please ask your system
to activate the synchronisation.
'port state' will switch to 'wait' again.
' with lower values indicating
'port state' will switch to 'wait' again.
8.8 Time
NTP and enter
'port
domain
Apply
'port
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