7. INSTALLATION
7.2Antenna Unit
The performance of the facsimile receiver is directly related to the antenna installation. In general, the antenna should be installed as high as possible on the vessel, free from the influence of nearby antennas, rigging and masts. Be sure to locate the antenna well away from TX antennas and noise generating equipment. Pay particular attention to the antennas of MF and HF radio equipment - they can damage the facsimile receiver through induction. (For better protection against induction, use the preamp unit.)
7.2.1General antenna connection
Connect the antenna to the facsimile receiver as shown below. If the preamp unit is installed, set jumper block J23 on the RCV Board (in the
| Wire Antenna | ||
| 6 m Whip |
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2.6 m Whip Antenna | Antenna |
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Preamp | Select | Junction | |
one. | |||
Box | |||
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Coaxial Cable |
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Facsimile | Facsimile |
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Receiver | Receiver |
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Preamp Used | Preamp Not Used |
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Antenna wiring and preamp status
7.2.2Wire antenna or whip antenna
•Either a long wire or whip antenna may be used. A wire antenna should be 15 meters or longer including the vertical section. A whip antenna should be 6 meters long.
•The antenna can be shared with other receivers; use an antenna switch or junction box.
•Connect the antenna to the facsimile receiver with a coaxial cable of which the diameter is larger than coaxial cable type
•If sensitivity of the wire antenna is low, use the preamp unit.