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products Abstand Rubidium Series 1 & 3: Module IE
Option NTP server
Abstand Alpermann+Velte

Descriptions:

PDF-document NTP Server

PDF-document NTP Client


Software:

ZIP-file NTP Tool

"Functional Description NTP Server:



With the NTP Server, the time signal, which is available at the internal bus of your rubidium system, can be made retrievable via the Ethernet. Therefore, some modules (currently, the GT / GI / GPS 10 MHz modules) can be configured to make their time useable for that.

Because the “Network Time Protocol” (NTP) is an open standard (Version 3 is defined in RFC 1305), there exist a lot of client-software packages for different operating systems. They make it possible to synchronize the computer’s clock to an NTP Server. Some operating systems even have integrated NTP Clients by default. To make use of the whole complexity of the protocol, it is recommended to use the reference implementation, which can be downloaded at "www.ntp.org". With our check software it is possible to ceck whether your computer is able to run NTP.

Specification
NTP version (server) 3
Supported NTP versions (as clients) 2, 3, 4
NTP mode 4 (server)
Queries per second est. 35
Behaviour at sync Stratum 1
Behaviour at sync-loss Stratum 0, Leap Indicator 3
Gemessene Measured sync precision
(ntpd 4.2.0-nt)
< 10 ms

The NTP Server delivers the time which is available at the internal bus by a periodical sent time telegram. To activate such a telegram, the desired module has to be configured to do so. Within the “Link” submenu, set one of the three possible telegrams to “Reference”. The NTP Server automatically detects the telegram and makes time available to the Ethernet.

We reserve the right to modify specifications without notice.

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