Chapter 3: Placing the Antenna
10
Interference
3.3.1 Radar
It is difficult to give exact guidelines for minimum distance between a radar
and the ADU – as radar power, radiation pattern, frequency and pulse
length/shape varies widely from radar to radar. Further, the ADU will typically
be placed in the near field of the radar antenna and reflections from masts,
decks and other items present in the vicinity of the radar will be different from
ship to ship.
Despite the issues mentioned above, the guidelines below can be given:
Since a radar radiates a fan beam with a horizontal beam width of a few
degrees and a vertical beam width of up to +/- 15°, the worst interference can
be avoided by mounting the ADU at a different level – meaning that the ADU is
installed minimum 15° above or below the radar antenna. Due to near field
effects the benefit of this vertical separation could be reduced at short
distances (below approximately 10 m) between radar antenna and ADU.
Therefore it is recommended to ensure as much vertical separation as possible
when ever the ADU has to be placed close to a radar antenna.
Содержание TracPhone F55
Страница 1: ...A Guide to the TracPhone F55 F77 Satellite Communications KVH TracPhone F55 F77 installation manual...
Страница 22: ...Table of Contents x...
Страница 28: ...Chapter 2 GMDSS Installations 6 Power Supply...
Страница 40: ...Chapter 3 Placing the Antenna 18 Antenna Mast Design...
Страница 48: ...Chapter 5 Installing the BDU 26 Grounding the BDU...
Страница 54: ...Chapter 6 F77 Distress Cradle 32 Assembly Alternative...
Страница 58: ...Chapter 7 F55 Passive Cradle 36 Passive Cradle Assembly...
Страница 64: ...Chapter 8 Connecting Power 42 Power supply specification...
Страница 84: ...Chapter 10 Hardware Interfaces 62 Discrete I O interface...
Страница 109: ...Appendix B F55 77 ADU Technical Specifications Outline Dimensions Flange 87 BBBB B 6 Outline Dimensions Flange...
Страница 116: ...Appendix C F55 77 BDU Technical Specifications 94 Measuring the Ship Source Impedance...
Страница 120: ...Appendix D Distress Cradle Technical Specifications 98 Outline Dimensions...
Страница 122: ...Chapter E Passive Cradle Technical Specifications 100 Outline Dimensions E 2 Outline Dimensions Dimension are in mm...
Страница 123: ...Chapter E Passive Cradle Technical Specifications Outline Dimensions 101 EEE...
Страница 124: ...Chapter E Passive Cradle Technical Specifications 102 Outline Dimensions...
Страница 126: ...Chapter F Handset Technical Specifications 104 Outline Dimensions F 2 Outline Dimensions Dimension are in mm...