11
Planning the Installation
Antenna Unit
Install the antenna in accordance with the following procedures to
insure maximum performance of the antenna. The antenna should be
installed in the place where is 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 signal (Refer to the drawing on the right).
Do not install the antenna near by the radar especially on the same
plane as their energy levels may overload the antenna 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 minimum of 15 feet (6m) away from
the 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 at the center of the vessel. For optimal performance of the
antenna, it is not recommended to install 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 fix 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 7 : Elevation Limit of Obstacles
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