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8029HEPTA-V2/GPS GPS - NTP Time Server with LAN Interface - V08.00
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hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
8.3.3 NTP Tab
This tab shows information and adjustment possibilities of the NTP services of the Time Server
8029HEPTA/GPS. The NTP service is the significant main service of the Time Server
8029HEPTA/GPS.
If you are not familiar with the subject of NTP you can find a short description in the Glossary.
More details are also available at
NTP functionality is provided by an NTP-Demon running on the embedded Linux of the Time
Server 8029HEPTA/GPS.
Depending on the receiving conditions and under unfavourable circumstances it may take
several hours until long-term accuracy is obtained (normally 5-10 minutes). During this time
the NTP algorithm adjusts the internal accuracy parameters.
The NTP time protocol must be enabled in order to use NTP
(see
Chapter 8.3.2.6 Time
After all changes relating to NTP a restart of the NTP service must be
performed (see
Chapter 8.3.3.6 Restart NTP
Via the NTP protocol SNTP Clients can also be synchronized. In contrast
to NTP in SNTP Clients delay times are not evaluated on the network. For
this reason the accuracy reached in SNTP Clients is lower than in NTP
Clients.
8.3.3.1 System Info
In the window "System Info" the current NTP values of the NTP service running on the
embedded Linux of the Time Server 8029HEPTA/GPS are indicated. In addition to the NTP
calculated values for root delay, root dispersion, jitter, and stability the stratum value of the
Time Server 8029HEPTA/GPS, the status to the leap second, and the current system peer
are also found here.
The NTP version used adjusts the leap second correctly.
The Time Server 8029HEPTA/GPS works as NTP Server with stratum 1 and belongs to the
best available class of NTP server, as it has a reference clock with direct access.