NTP100 – Rev 1.0.1 Dec-04
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© Masterclock
®
, Inc.
Server port - The default, well-known port for NTP service is 123. This can be changed as desired. Note that some
NTP/SNTP clients will expect NTP servers to operate on port 123 and cannot be configured to utilize alternate ports.
Provide NTP broadcasts – By default, the NTP100 will operate only in Query mode. The NTP100 can be set up to provide
NTP broadcasts. When enabled, the broadcast on/to port may be specified as well as the frequency that broadcasts will be
issued. This can be changed as desired.
NOTE: While providing NTP broadcasts, the NTP100 device can also continue to be queried.
Note that some NTP/SNTP clients will expect NTP servers to operate on port 123 and cannot be configured to utilize
alternate ports.
Stratum Level Assignment – a unique added feature of the NTP100 are stratum levels that are user-assignable. The NTP100
stratum levels are user assignable from 0-15, for both the external reference (primary – GPS or Time Code) and the internal
clock reference (secondary - TCXO).
The factory default stratum level settings for the NTP100 family are “2” for the External Ref, and “3” for the Internal Clock.
The Internal Clock stratum level cannot be adjusted to a reference level exceeding that of the External Reference.
A reference level of “0” is defined to be “disabled”.
Selecting NTP broadcast mode
Assignable Stratum Levels for the –GPS and –TC models
