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4.1 Installation of ADU
Planning the Installation
Install the antenna in accordance with the following procedures to ensure maxi-
mum performance of the antenna. The antenna should
be installed in a place where it has an all-around clear view of the horizon. Please
be sure there are no obstacles within 15 degrees above the antenna. Any obsta-
cles can prevent the antenna from tracking the satellite signal (Refer to the draw-
ing 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 x tightly to the structure of
the vessel. When setting the antenna down, be careful not to damage the RF con-
nector. Striking the connectors on the bottom directly will damage the connector.
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