4.3.2.3 System Tab: Events
Minor Alarm Active
Minor Alarm Inactive
Major Alarm Active
Major Alarm Inactive
Unit Reboot
Timing System Software Error
Timing System Hardware Error
High Temperature, Minor Alarm
High Temperature, Minor, Cleared
High Temperature, Major Alarm
High Temperature, Major, Cleared
4.3.3 Configuring GPS Notification Alarm Thresholds
VersaSync allows you to configure Minor and Major alarm thresholds for the GNSS
receiver. This is done by setting the minimum number of satellites the receiver can track
for a set time before an alarm is triggered. If both conditions are met, i.e. the reception qual-
ity falls below the set number of satellites for the set amount of time, an alarm is triggered.
The alarm notification feature described below allows you to be notified of a potential
reception issue BEFORE the GNSS reference becomes invalid. This may be useful e.g., to
notify system operators of a deteriorating signal reception before VersaSync loses the
GNSS reference.
Note that VersaSync itself has a pre-defined minimum number of satellites that must be
tracked in order for GNSS to be considered a valid reference. The minimum number of
satellites depends e.g., on your receiver mode, the GNSS signal reception in the area
where your antenna is located, and the type of receiver in your unit. In Stationary mode,
and for SAASM units, the minimum number of satellites is normally 4 (four). Hence, it
would be prudent to set the Minor Alarm Threshold to 8, and the Major Alarm Threshold to
6.
Note: While GPS Notification Alarms can be used in Mobile GNSS receiver
mode, it is not advisable.
214
CHAPTER 4 • VersaSync User Manual Rev. 7.0
4.3 Notifications
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