Konsberg AIS 200, Installation Manual

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Kongsberg AIS 200 Installation Manual, rev. 2 Installation
3.4.1 Antenna cables
The antenna cables should be as short as possible to minimise attenuation of the signal. The
cables should be located at least 10 cm away from power supply cables.
The table below shows the maximum cable length (VHF) for the different antenna cable
types.
Cable type Max. length at 160 MHz
RG58 10 metres
“PUR” 58 *
10 metres
RG213 30 metres
RG214 * 30 metres
LowLoss ½” * 100 metres
* Recommended cable types.
3.4.2 Power cables
Use minimum 2 x 2.5 mm
2
cables to avoid voltage drop.
3.5 Location of the units
The units included in the AIS 200 system should be mounted with special regard to the units’
environmental protection, temperature range and cable length. Refer
Technical Specifications ,
page 2 onwards.
3.5.1 Antenna location
The AIS equipment, like any other ship borne transceiver operating in the VHF maritime
band, may cause interference to a ship’s VHF radiotelephone. This interference may occur as
a periodic (e.g. every 20 s) soft clicking sound on a ship’s radiotelephone.
This affect may become more noticeable when the VHF radiotelephone antenna is located
near the AIS VHF antenna, and when the radiotelephone is operating on channels near the
AIS operating channels (e.g. channels 27, 28 and 86).
The figure below shows recommended location and distance between the different antennas.
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