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.