Installation & Operation Manual TCC70XS
Page 47
Stratum
This field indicates the stratum value received from the selected NTP server.
This value tells the “distance” of the server to a reference clock. A server that is directly
connected to a reference device (e.g. an atomic clock or a GPS clock or a radio clock)
would have stratum 1. Any server that synchronizes to a stratum 1 server has stratum 2
and so on.
If this
field indicates “n/a”, no value has been received yet
, and this may be a hint to an
error. Please consider the possibility that any firewall may block network traffic.
Reference
This field identifies that server which forms the reference for the selected NTP
server. For example, this field identifies a stratum 2 server if the selected server has a
stratum value of 3.
In case of stratum values 1 or 0 a, this field consists of a string of up to four characters,
e.g. DCN, NIST, DTS, GPS, PTB, PPS, etc.
In case of stratum values >1, this field shows the IP address of the reference server.
If this field indicates “n/a”, no value from the selected server has
been received yet
(same as field
Stratum
), and this may be a hint to an error.
Poll Count
The number of queries that have already been sent to the server. This value resets
to zero if the IP address is changed.
Failed Polls
The number of queries that could not be sent or have not been answered.
Generally, this is due to an unreachable server.
Last Poll
The time and date (UTC, 24h) of the last query that was sent to the server. If there
wasn’t any query yet, “n/a” is shown
. During normal operation, this field should
change in a 64 second interval.
Active Host
Current NTP server in use: “
Primary
“ or “
Secondary
“.
Automatic Changeover
If checked,
a changeover between “
Primary
“ and “
Secondary
“
can
be done automatically. If you select two NTP servers, then it is recommended to use this
automatic mode.
Last Auto Changeover
The time and date of the last automatically initiated changeover;
“n/a” if no changeover took place yet. This value resets if any IP address is changed
.
Manual Changeover
Click this button
Changeover
to force a changeover manually.
Changeover Count
The number of automatic or manual initiated changeover events. This
value resets to zero if any IP address is changed.
Client
Current Date/Time
Current date and time of the NTP client when the page was loaded.
Drift Correction
This status
indicates the difference of the internal oscillator’s frequency
between nominal value and current value. A difference will arise due to synchronization
with the NTP server. If this value shows a high degree of fluctuation, the synchronization
does not work properly, maybe due to a high jitter of the NTP server. In case of quiet
high values (> 500), either the internal oscillator or the NTP server may be out of tune.
Sync
“
yes
“
is shown if at least once a valid time & date has been received from the NTP
server.
Lock
“
yes
“ is shown if
the NTP client is locked to the NTP server.
Last Sync
Time & date of the last successful synchronization. This moment should not be
older than approx. 64 seconds during normal operation.
