Chapter 4 MDP-621/641/640
Installation Operation manual
4.4.2 Scanner unit
Radar's target detection ability increases with the height of the scanner. The ideal location is as high
as possible along the boat's keel line and clear of any obstructions.
(1) 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?
(2) 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.
(3) 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 4.4.2.1.)
(4) 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.
(5) 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
CAUTION
(6) 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. If
you need a longer cable, limit the length to a maximum of 100 m (MDP-641/640) or 30 m
(MDP-621)
4-4 0093161022-06
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