11
15°
Planning the Installation
Selection of Installation Site
Install the antenna in accordance with the following procedures to
ensure maximum performance of the antenna.
The antenna should be installed in a place where it has an all-round
clear view of the horizon. Please be sure there are no obstacles within
15 degrees above the antenna. Any obstacles can prevent the antenna
from tracking the satellite’s signal (Refer to the drawing on the right).
Do not install the antenna nearby the radar, especially if their on the
same plane, as their energy levels may overload the antenna’s front-end
circuits. It is recommended to position the antenna at least 4 feet (1.2m)
above or below the level of the radar and a minimum of 15 feet (4.6m)
away from any high power short wave radars.
The mounting platform should be rigid enough and not subjected to
excessive vibration. The movement of the antenna can be minimized by
installing it at the center of the vessel. For optimal performance of the
antenna, it is not recommended to install it at any corner of the vessel,
where the movement of the vessel is the greatest. Install the bottom
of the antenna parallel to the surface of the sea and x it tightly to the
structure of the vessel.
When setting the antenna down, be careful not to damage the RF
connector. Striking the connectors on the bottom directly will damage
the connector.
Figure 07 : Elevation Limit of Obstacles
Antenna unit Obstacle
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