User manual

Masterclock RC 500 User Manual – v2014.01.01
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NTP CLIENT
While on the “Input Control” window, click the [NTP
Client] button to access settings for the NTP client.
ENABLE NTP CLIENT – is enabled by default. However, it
may be desirable to disable the NTP client for certain
applications, such as those in which the RC 500 will
not reside on a network during typical operation.
Deselect “Enable NTP client” if desired.
The network client can be configured to either query
the NTP time server at a selected interval, to listen to
NTP broadcasts only, or to listen to multicast
broadcasts.
NTP CLIENT SETTINGS
QUERY NTP SERVER FOR TIME – is enabled by default.
This is the unicast mode. The default configuration is
to query the NTP server at 10-second intervals.
The NTP settings are located in the upper left-hand
section of the window. The Primary reference
information must be configured in order to acquire
time from an NTP reference.
Enter either the IP address or Internet address/URL
(Uniform Reference Locator) for the NTP reference.
If available, enter a secondary reference for backup.
The primary and secondary server information can
automatically be configured by the DHCP server
when selecting the “Use NTP server(s) address
provided by DHCP server” provided your DHCP
server is configured to do so. Consult your network
administrator to use this option.
By default, the NTP clock will operate only in
Unicast/Query mode using server port 123.This
mode is selected exclusively when neither the listen
for NTP broadcast nor the listen for NTP multicast
modes are selected.