Service
98-175666-D Chapter 3: Setup of the antenna 3-34
3.3.2 Calibration
Before the SAILOR XTR GX-R2 can be used you must select a heading input in order to
make an azimuth and cable calibration. The azimuth calibration is required in order to
determine the offset of the ADU zero direction to the bow-to-stern line of the ship. This
procedure is fully automatic. The satellite data for calibration can be entered directly
on the calibration page. A cable calibration is required in order to record the cable
characteristics of the antenna cable which is used in the fixed gain feature.
Azimuth calibration
Azimuth calibration is done toward a satellite of a known position. After finding the
satellite, the system can calculate the azimuth offset of the ADU. The satellite and
transponder properties for the calibration can be selected from a list of service profiles
or supplied manually. The azimuth relative position is the momentary azimuth value
of the ADU, a dynamic value. The Azimuth calibration value is the calculated ADU
azimuth value after an azimuth calibration, a fixed value.
Automatic azimuth calibration with an active VSAT profile
You can enable automatic azimuth calibration, even if there is no line of sight to an
azimuth calibration satellite from the place of installation. To use this feature you
must have made a valid VSAT profile and have activated it. When the vessel leaves the
harbor and gets line of sight to the satellite, the system automatically finds and tracks
the satellite and makes the azimuth calibration. After a successful azimuth calibration
the BDU will automatically disable the setting Azimuth calibration (active satellite
profile) on the page Service > Calibration.
Important
You must log in as an administrator to do a calibration.
Figure 3-24: Service - Calibration
Note
If the target satellite is in inclined orbit, the elevation range is extended
accordingly.
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