Raymarine Radome Scanners Benutzerhandbuch

10

             Radome Scanners - Users Guide

Radome radar systems are intended for use on boat’s DC power systems 
operating in the range 10.7 to 32 V DC. That is 12 V and 24 V systems, they 
should not be used on 32 V systems.

A 1.5 m (5ft) power cable is supplied with the display unit for connecting 
the boat’s DC power to the radar scanner via the display unit.Refer to the 
relevant display unit handbook for details on connecting this cable.

If your boat has a 24 V power system, the power cable may be extended by 
up to 20 m using a wire gauge of 1.5 mm

2

 (AWG 16) or greater, irrespec-

tive of the inter-unit cable length.

If your boat has a 12 V power system, longer power cable runs may require 
larger wire gauges to minimize any voltage drop in the cable. 

For full details on extending the power cable and maximum permissible 
lengths refer to Extending the power cable on page -11.

The boat’s power system should be either:

•

Negative grounded, with the negative battery terminal connected to 
the boat’s ground, or,

•

Floating with neither battery terminal connected to the boat’s ground.

Radome scanners receive power from the display via the inter-unit cable. 
The display power cable is supplied with the display unit and details for 
connecting power are detailed in the relevant Owner’s handbook.

It is important that an effective radio frequency (RF) ground is connected to 
the radar system.

You must ground the radar by connecting the drain wire (screen) of the 
power cable to the nearest ground point of your boat’s RF ground system. 
Full details can be found in the Owner’s Handbook for your display unit.

If you need to extend the wire, the extension wire should be an 8 mm braid 
or 6 mm

2

 (AWG 10) multi-strand cable.

If your boat does not have an RF system, connect the drain wire to the 
negative battery terminal.