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System description
3
850-164385 / Rev.C
Sonar room units
The Transceiver Unit is located in the sonar room, close to the
Hull Unit. One signal cable is used for communication with the
Sonar Interface Unit in the wheelhouse. The transceiver
performs the signal processing and the digital beamforming of
the 240 transmitters and 480 receiver channels, which are
located on the eight identical transceiver boards.
The Hull Unit is designed to be lowered 1.0 meters below the
ship’s hull. The transducer can also be lowered to any selectable
middle position. Note that in case of voltage failure, the Hull
Unit can be manually raised or lowered by means of a hand
crank.
The cylindrical 480-elements transducer allows the sonar beam
to give full 360 degrees coverage of the water volume down to
-60 degrees.
The sensor for the electronic stabilization of the sonar beams is
housed in the Motor Control Unit, which is mounted on the Hull
Unit.
Warning: If the transducer hits larger objects or bottom,
the transducer shaft may be bent, or in worst
caseitcanbebrokenoff.Abrokentransducer
shaft will cause water leakage in the top of the
shaft. To prevent larger l eakages in s uch a case,
do not
raise the transducer shaft to the upper
position. To prevent serious damages it is
therefore of great importance to have a good
pump and warning system in the sonar room.
Related topics
System diagram, page 4
13


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