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F R O N T- PA N E L K E Y PA D A N D D I S P L AY
NTP: Setup
This display provides access to the NTP broadcast and multicast settings and provides you with a
convenient means of checking the current configuration and allows limited setup. You may also
perform a more complete broadcast/multicast configuration via a telnet or ssh session or the local
RS-232 console using the ntpconfig utility. This utility provides a more secure means of setup and
so is more complete. It will allow you to select keys and identify trusted keys.
This display will indicate that the mode is broadcast4, broadcast6, multicast4, multicast6, or disabled.
It allows IPv4 or IPv6 configuration of either broadcast or multicast with selection of the broadcast
address, multicast time-to-live (TTL) and trusted key for MD5 authentication. The broadcast/
multicast mode may also be disabled.
Broadcast Mode
In this mode the broadcast address is displayed. If MD5 authentication is
selected the trusted key number will also be displayed.
Multicast Mode
The multicast address must be 224.0.1.1 or ff05::101. Multicast may also use
MD5 authentication. If selected, the trusted key number will also be displayed.
Press EDIT to change the broadcast/multicast settings. Each of the edit windows has help information available to guide you through the setup process. Note that changing the NTP multicast/
broadcast settings does not take effect until the system reboots. The new parameters are loaded to the
ntp.conf file in the /boot/etc/ directory. Only the broadcast line in the ntp.conf file is modified. The
final display in the edit sequence requires confirmation of your intent to change the instrument settings. Once confirmation takes place, the instrument will reboot.
Optional PTP Menu
The PTP Menu is used for control and status of the PTP/IEEE-1588 option.. See Chapter 4 - PTP/
IEEE-1588 for more information.
Clock Menu
The Clock Menu provides access to the parameters related to timekeeping. These are Time Mode,
Time Zone, Hours Mode, and Daylight Saving Time (DST). These displays are all described below.
Clock: Time Mode
Time mode defines the time format used for the front-panel time display and, if installed, the optional
Time Code or Serial Time output. The time mode does not affect the NTP output, which is always
UTC. Possible values for the time mode are GPS, UTC, Local-Auto and Local-Manual. GPS time
is derived from the GPS satellite system. UTC is GPS time minus the current leap second correction.
Local time is UTC plus time zone offset and DST. Local-Manual means you enter the time zone and
DST information. Local-Auto means this information is decoded from the CDMA signal.
Clock: Time Zone
The time zone is used in calculating the current Local time when the time mode is set to Local (see
time mode above). Press the EDIT key to change the value. Enter a negative offset for time zones
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