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Gemini G3 - User Manual
47
4.7.3.8
Setup (Advanced)
►
Time Source
To facilitate tracking of events in a network, the Paragon3 base station and the GeminiG3
radiomodem can initialize their real-time clocks using a number of protocols. At reset time, the
Paragon3 base station can use the SNTP protocol (RFC2030) to pick up the current UTC (Universal)
time. Setting the “TimeZone” and “Daylight Savings” options allows displaying the correct local time
in the “Unit Status” web page.
Figure 43 - Advanced IP Configuration - Time Source
Item
Description
Time Source
♦
GPS – No on-air penalty, very accurate
♦
Airlink – Light on-air penalty, least accurate
♦
SNTP – Medium on-air penalty, medium accuracy
Place a check mark against each of the available time sources to be used on
your network.
The preference order is GPS, Airlink, and SNTP. Source selec-
tion for time updates is always to the one with the least on-air penalty.
Airlink time source originates in the Paragon3 base
(providing the base is time-
aware)
SNTP is a UDP/IP protocol that synchronizes the clocks of computer systems
over packet-switched, variable-latency data networks.
Refresh Period
Determines the interval in seconds before a time update will be accepted from
the time source in use.
Source
Selection
Refresh Timeout
Determines the interval in seconds after which the source selection will switch
to the next available time source in the preference order
(providing it has been
selected).
Client
Disabled (Default), Enabled
Server address
IP of the SNTP Server in dot decimal format
Period
Period at which the SNTP Server is polled
SNTP
SNTP UTC Time
Time in seconds since Jan 1, 1970 00:00:00.
Note: the correct local time is displayed in the "Unit Status" page.
TimeZone
Select from drop-down list
Time
Zone
Daylight Savings
Disabled (Default), Enabled