Installation Guide
n
Setting the
Time Error Limit
to the highest value that meets the requirements of the applic-
ation for which the SyncServer is being used. In this case, Microsemi recommends 4 mil-
liseconds as an acceptable value for NTP synchronization.
Mobile Applications
If the SyncServer might be transported while operating, put the GPS receiver in
Dynamic
mode. In this mode, the GPS receiver continuously updates its position. This provides:
n
Much greater timing accuracy than Position Hold for mobile operation
n
Less timing accuracy than Position Hold for stationary operation. If the SyncServer is
being used primarily for NTP synchronization, this decrease is negligible compared to the
timing latency on most networks. If the SyncServer's other timing outputs are being used,
the user should perform field tests to ensure that accuracy meets the requirements of the
application.
Note: Avoid using Position Hold while operating the SyncServer from a location that is dif-
ferent from the one that the GPS receiver has. Doing so introduces timing errors that
increase with the size of the difference of the latitude, longitude and altitude readings
between the SyncServer and the GPS receiver.
UpgradingSystem Software
Overview of the Software Upgrade Process
In its factory default configuration
, the SyncServer automatically checks for software
upgrades every weekday shortly after noon local time. If an upgrade is available, the Syn-
cServer generates a
System Upgrade Alarm
.
The user responding to the alarm logs into the web interface. The status bar at the top of the
window may show that an alarm has been triggered, and on the
STATUS - General
page,
"Release Version" states that an upgrade is available.
Before upgrading, as a precaution, the user should back up the configuration of the Syn-
cServer (
WIZARDS - Backup
). Normally, the SyncServer transfers its settings from one ver-
sion of the software to the next. However, if the upgrade process is interrupted (e.g., loss of
power), the settings may be lost. Having the backup makes it possible to restore the previous
settings if that happens.
The user downloads the software upgrade file from the Microsemi web site to their work-
station and then follows the steps given below for upgrading the software on the Syn-
cServer.
Note: Please avoid decompressing the *.tar upgrade file prior to upgrading the SyncServer.
For security, the SyncServer will reject any file that has been modified or decompressed and
recompressed. If needed, download a new software file from Microsemi.
Prerequisites for the System Upgrade Alarm to Work
The SyncServer notifies the user when a software upgrade is available, provided all of the fol-
lowing items are true:
997-01520-02 Rev. G2
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