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System description
3
850-164186 / Rev.D
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 241 transmitters and 241 receiver channels, which are
located on the eight identical transceiver boards.
The standard Hull Unit is designed to lower the transducer 1.0
meters below the ship’s hull. (Optional hull units will lower the
transducer to 1,2 or 1,6 meters below the 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 spherical 241-elements transducer allows the sonar beam
to give full 360 degrees coverage of the water volume around
and below the vessel.
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 o bjects or botto m ,
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 leakages in s uch a ca se,
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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