Safran SecureSync 2400 - Page 284

4.2.3 Configuring GPS Notification Alarm Thresholds
SecureSync 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 quality 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 SecureSync loses the GNSS reference.
Note that SecureSync itself has a pre-defined minimum number of satellites that
must be tracked in order for GNSS to be considered a valid reference. The min-
imum 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 satel-
lites 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.
To determine which GNSS receiver mode your SecureSync is using and how
many satellites your SecureSync unit is currently receiving, navigate to
INTERFACES > REFERENCES: GNSS0. See also "Reviewing the GNSS Refer-
ence Status" on page226.
To set the GPS Alarm Thresholds:
1.
Navigate to MANAGEMENT > OTHER: Notifications, and choose the GPS
tab.
2.
At the bottom of the window, locate the ALARM THRESHOLD panel:
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CHAPTER 4 • SecureSync 2400 User Manual Rev. 5.2
4.2 Notifications