Spectracom VersaSync User Manual page 166

3.3 Managing References
a vehicle, ship or aircraft.
Offset [ns]: to account for antenna cable delays and other latencies
Receiver dynamics : to optimize performance for land, sea or air operation
The ability to delete the stored GNSS position information (latitude, longitude and
antenna height).
The option to determine when a resurvey is to be performed (supported only by newer
GNSS receivers).
To configure the GNSS Receiver Mode for your VersaSync unit:
1.
Navigate to INTERFACES > REFERENCES : GNSS 0 . The GNSS 0 Status panel will open.
2.
Select Edit in the bottom-left corner. The GNSS 0 configuration window will open:
3.
Select the desired Receiver Mode, and click Submit .
GNSS Receiver Modes
The receiver modes are:
Mobile Mode : This is the default mode for VersaSync. In Mobile Mode, GNSS surveys
(see below) will NEVER be carried out since the position status is updated in near real-
time. VersaSync will go into synchronization shortly after beginning to track satellites.
Standard Mode : While the Standard Mode tends to be the most accurate GNSS
Receiver Mode, it can only be used
must not be moved. In Standard Mode the so-called GNSS survey will be performed as
soon as at least four GNSS satellites become available and no previously carried out
survey was found. Upon completion of the survey the GNSS receiver will lock-in the cal-
culated position and will enter Standard Mode. Once the survey is completed, less than
four satellites will provide a valid Time and 1PPS signal.
Single Satellite Mode : This mode is designed for stationary applications which cannot
track at least
window so as to complete the GNSS survey. This occurs frequently in areas with limited
view of the sky (e.g., "urban canyons").
In Single Satellite Mode, the GNSS receiver will be considered a valid input reference
as long as:
154
for stationary applications
four GNSS satellites for at least
, i.e. the VersaSync unit
33 minutes continuously in a 12-hour time
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3 VersaSync User Manual Rev. 6.0