Spectracom VelaSync 1232 User Manual page 183

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 VelaSync loses the
GNSS reference.
Note that VelaSync 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.
To determine
to INTERFACES > REFERENCES:
Status" on
To set
1. Navigate to
2. At the bottom of the window, locate the
3. In the
4. In the
CHAPTER 4 • VelaSync User's Manual Rev. 3
Note: While GPS Notification Alarms can be used in
receiver mode, it is not advisable.
how many satellites
page 124.
the GPS Alarm Thresholds:
MANAGEMENT > OTHER:
Minimum Satellites
must be available before the alarm is triggered. The alarm will be triggered when
the number of satellites available is
Duration Below Threshold (s)
system must be below the threshold set in the
an alarm is triggered. The alarm will be triggered when this time is reached.
By default, this timeout value is set to 0 seconds: As soon as the receiver drops
below the minimum number of satellites, the associated alarm is triggered. A
your VelaSync unit is currently receiving, navigate
GNSS 0. See also "Reviewing the GNSS Reference
Notifications, and choose the
ALARM THRESHOLD
fields enter the minimum number of satellites that
BELOW this number.
fields, enter the time
Minimum Satellites
4.4 Notifications
Mobile GNSS
GPS tab.
panel:
in seconds that the
field before
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