Chapter 2: Installing the system
8
Placing the antenna
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 covers 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
Size of Obstruction
3 m
16 cm
5 m
26 cm
10 m
52 cm
20 m
104 cm
Содержание FB250
Страница 13: ...Table of contents xii ...
Страница 77: ...Chapter 3 Connecting power 64 Connecting power ...
Страница 105: ...Chapter 5 Starting up the system 92 Operating the system ...
Страница 129: ...Chapter 6 Service and repair 116 Replacing modules in 34 3052B antenna ...
Страница 139: ...Chapter 7 Troubleshooting 126 Logging of events ...
Страница 147: ...Appendix B Technical specifications 134 FB500 antenna B 2 3 Antenna outline dimensions FB500 in 26 66 cm dome ...
Страница 148: ...Appendix B Technical specifications FB500 antenna 135 BBBB Technical specifications FB500 in 35 89 cm dome ...
Страница 154: ...Appendix B Technical specifications FB250 antenna 141 BBBB Technical specifications FB250 in 19 48 cm dome ...
Страница 165: ...Appendix B Technical specifications 152 TracPhone terminal ...
Страница 197: ...Glossary 184 ...