Interaction With Sea And False Echoes; Cables And Grounding - Simrad argus Installation And Service Manual

Argus Radar - INSTALLATION AND SETTINGS
All installations should facilitate protection of equipment from damage, including
cabling.
Safe service access should be provided using service platforms where
necessary, having a minimum size of 1 m
safety rail of suitable height.
Consideration should be given to the compass safety distance, as supplied by
the manufacturer, when positioning equipment units.
The design of the mounting platform for the antenna and antenna pedestal
should take into account the vibration requirements of resolution A.694(17) and
furthermore defined by IEC 60945. In addition to vibration, the design of the
mounting platform should consider shock and whiplash due to conditions at
sea.

Interaction with sea and false echoes

1.2.3
Considerations of interaction with the sea imply that the radar antenna should
be only as high as necessary to clear major objects, and as high to be
consistent with other requirements regarding acceptable horizon and target
detection range. The location of the antenna should minimize sea clutter
returns and the number of multi-path nulls.

Cables and grounding

1.2.4
Cables and grounding should comply with the following:
Cable screens, especially coaxial cable screens, should be installed according
to manufacturer's documentation.
The cables should be kept as short as possible to minimize interference and
attenuation of the signal.
All cables between antenna and radar system units should be routed as directly
as possible, consistent with consideration for other equipment, in order to
reduce electromagnetic interference effects. Cables should not be installed
close to high-power lines, such as radar or radio-transmitter lines.
Crossing of cables should be done at right angles (90°) to minimize magnetic
field coupling.
All outdoor installed connectors should be waterproof by design to protect
against water penetration into the cables.
Cables and microwave transmission lines should be handled carefully and be
without sharp bends.
Cables and microwave transmission lines should be installed with sufficient
physical separation, as defined in the manufacturer's documentation.
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at a suitable height and with a
1.3