Placing The Antenna - KVH Industries TracPhone FB250 Installation Manual

Chapter 2: Installing the system

2.2 Placing the antenna

2.2.1 Obstructions
The antenna rotates 360° and down to –25° for the TracPhone FB500 and -
60° for the TracPhone FB250 in pitch and roll, to allow for continuous pointing
even in heavy sea conditions. Any obstructions within this volume can cause
signal degradation.
The amount of degradation depends on the size of the obstruction and the
distance from the antenna. As a rule of thumb any obstruction that subtends
an angle of less than 3° at the antenna has limited effect. The table below
gives a guideline for obstruction sizes that will cause limited degradation.
Distance of Obstruction
3 m
5 m
10 m
20 m
8
Size of Obstruction
16 cm
26 cm
52 cm
104 cm
Placing the antenna