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.
Note:
While GPS Notification Alarms can be used in
Mobile GNSS
receiver mode
, it is not advisable.
To determine
how many satellites
your VelaSync unit is currently receiving, navigate
to
INTERFACES > REFERENCES: GNSS 0
.
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:
3.
In the
Minimum Satellites
fields enter the minimum number of satellites that
must be available before the alarm is triggered. The alarm will be triggered when
the number of satellites available is
BELOW
this number.
4.
In the
Duration Below Threshold (s)
fields, enter the time
in seconds
that the
system must be below the threshold set in the
Minimum Satellites
field before
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
4.4 Notifications
CHAPTER
4
•
VelaSync User's Manual Rev. 3
171
Summary of Contents for VelaSync 1225
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Page 12: ...BLANK PAGE X VelaSync User s Manual TABLE OF CONTENTS...
Page 28: ...16 CHAPTER 1 VelaSync User s Manual Rev 3 1 7 The VelaSync Web UI...
Page 34: ...BLANK PAGE 1 9 Regulatory Compliance 22 CHAPTER 1 VelaSync User s Manual Rev 3...
Page 104: ...BLANK PAGE 2 11 Configuring PTP 92 CHAPTER 2 VelaSync User s Manual Rev 3...
Page 251: ...Server management System specifications VelaSync User s Manual 239 APPENDIX...
Page 267: ...VelaSync User s Manual 255 APPENDIX...
