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Chapter 1: Overview 5
1.3 Selecting the scanner unit site
This section provides information that affects the possible locations
of the scanner, and its position relative to the display unit and to the
power supply.
The dimensions of the each scanner unit are shown in the following
diagrams.
Selecting the best location for the scanner unit requires careful
consideration of the following points, to ensure reliable and trouble
free operation:
Note: In order to minimize potential interference to other systems on
board ship (EMC), it is advisable to mount the scanner on a part of
the boat that is insulated from the ship’s battery negative. If you can-
not do this, and encounter problems, you can fit insulating bushes be-
tween the scanner and its mounting bracket.
• Height: The scanner unit should normally be mounted as high as
practical above the waterline, for three reasons:
• For safety reasons the scanner should be out of range of per-
sonnel, preferably above head height. This avoids mechanical
danger and electromagnetic contact, particularly with the
eyes.
• Radar operates at the line-of-sight, so a high mounting posi-
tion gives better long range performance.
• Surrounding large objects, in the same horizontal plane, can
interfere with the radar signal and cause blind areas or shadow
sectors and false targets on the radar screen (see below).
However, do not mount the scanner so high that it is affected by
the pitching and rolling of the vessel. In addition, you may need to
lower the scanner to avoid creating a shadow sector underneath
the scanner’s beam.
Extension cable 5m
Extension cable 10m
M92699
M92700
-
-
5S, 7S, 9S, 11S
(24/32V only)
5S, 7S, 9S, 11S
Software Upgrade Kit Please contact your authorized dealer or
distributor for details
Table 1-2:Open array scanners
Item Part No. Supplied with: Option for:
154_4.book Page 5 Wednesday, October 25, 2000 3:02 PM