1. HOW TO INSTALL THE SYSTEM
1-4
Outdoor installation
• The coupler is water-jetsproof, but is not designed to take a continual soaking.
• Install the coupler close to the antenna base.
• Keep wires as short as possible and keep the wires away from any grounded con-
ductors such as lifelines, mast shrouds, or fittings.
• Locate the insulator away from funnels, etc.
1.2.2 Ground
The ground connection must have the lowest possible RF-impedance. Losses in the
ground connection reduce the communication distance.
Make the ground connection to the Antenna Coupler with a copper strap, constructed
as shown below. For vessels with conducting hulls, make the width at least 60 mm
and the length not more than one meter. For FRP vessels, make the width at least 60
mm and the length not more than five meters.
Note: Coat the copper strap between the ground plate and ground terminal of the an-
tenna coupler with marine paint to prevent corrosion.
Coat the junction where the copper strap connects to the ground terminal of the an-
tenna coupler with silicone sealant.
It is recommended to add a supplemental ground wire (local supply, more than 14 sq.)
and fasten it to the ground terminal of the antenna coupler as shown below.
CAUTION
Ground the equipment.
Ungrounded equipment can
give off or receive electro-
magnetic interference or
cause electrical shock.
Copper strap
Ground plate
(a piece of steel plate)
Weld to ship's structure
Braze
For outdoor installation, apply a coat
of marine paint to prevent corrosion.
Solder
Connect to the ground termnaml of the
antenna coupler.
Ground terminal of the antenna coupler.
Copper strap
It is recommended to
fasten the supplemental
ground wire (more than
14 sq.).
Coat with silecone sealant.
Coat with silecone sealant.
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