Advanced Marine Electrics and Electronics Troubleshooting A Manual for Boatowners and Marine Technicians

154 marine electronics installation and troubleshooting

do not remove it when pulling cables

through the boat during installation. If

the cabling has to be removed, it must be

reassembled in exactly the same way and

in the same position.

These considerations are universal and

should be carried out for all radar system

installations.

Power Supply

As with satellite communications systems,

radar systems have multiple power-supply

requirements: one to the display unit or

receiver, one to the antenna or scanner, and

possibly one to the scanner’s motor drive. Dif-

ferent equipment manufacturers take differ-

ent approaches; some of them use multiple

Two typical power cord ferrites. These small devices are

increasingly found on wiring harnesses and power supply

cords on modern equipment, and they are crucial in help-

ing to minimize interference effects.

display unit

distribution panel

multiplexer

GPS antenna

radome unit

fluxgate compass

NEMA

12 V supply

12 V supply 12 V supply

junction box

NEMA cable

A typical radar system layout with peripheral electronics. This is a relatively simple point-to-point arrangement. Radar can

also be integrated into an onboard network to share data with several other devices, such as autopilots, repeater dis-

plays, and chartplotters.