Instruction Manual

RA51/52/53/54/55 INSTRUCTION MANUAL – 05 11
3.3 Where to Install the Scanner _____________________________
3.3.1 Scanner unit
Radar's target detection capacity varies greatly depending on the position of the scanner. An
ideal position is a location high above the ship's keel line where there is no obstacle all around
the scanner. In an actual ship, such an ideal location is limited by various factors. To comply
with FCC RF exposure requirements, the radar antenna for this scanner must be installed to
provide a separation distance of 1.3 m or more from all persons.
(a) Install the scanner as high as possible.
Consider the structural support of the location. Will it hold the weight of the scanner?
How difficult will it be to get to the scanner for maintenance?
(b) Install the scanner away from masts.
If the scanner is installed at the same height as a mast, radar waves may be blocked,
creating shadow zones or generating false echoes.
(c) Install the scanner forward of obstacles.
If you can't avoid an obstacle, place the scanner on the bow side of it. When installing the
scanner on a mast, position it in front of the mast. (If obstacles cannot be avoided for
structural reasons, refer to "Shifting away from obstacles" in Section 3.3.3.)
(d) Do not install the scanner near hot or heat-generating items.
Do not install the scanner where it may be subjected to smoke or hot air from exhausts or
heat from lights.
(e) Install the scanner away from other antennas.
Keep it as far as possible from the antennas of other electronic equipment.
Radar scanners will cause interference with radio
transceivers. Keep them as far apart as possible
(f) Keep the cable length as short as possible.
Keep the distance from the scanner to the display unit within the standard cable length of
10 m (or 15m). If you need a longer cable, limit the length to a maximum of 100 m.
3.3.2 Display unit
The display unit can be installed in a helm console, bulkhead, or electronics box. Consider
these suggestions:
(a) A place where you can see the boat's bow when looking straight up from the radar screen.
(b) A place where there is no direct sunlight to avoid display temperature buildup.
(c) A place where there is good ventilation and minimum vibration.
(d) A place where the display unit is more than the minimum safe distance from a magnetic
compass as listed in Tab.3-5 below.
Tab.3-5 Minimum Safe Distance from Magnetic Compass
Standard compass Steering compass
Scanner unit 2.0m 1.4m
Display unit 2.0m 1.4m
!
CAUTION