11
Planning the Installation
Selection of Antenna Installation Site
Install the antenna in accordance with the following procedures to
insure maximum performance.
The antenna should be installed in a place where there is all round clear
view of the horizon. Please be sure there are no obstacles within 15°
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 the radar especially on the same plane.
Its 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 (4.6m) away from
the high power short wave radars.
The mounting platform should be rigid 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.
Figure 07 : Elevation Limit of Obstacles
15°
Antenna Unit
Obstacle
