Kongsberg Simrad EK80, Installation Manual

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Ethernet switch description
A high capacity Ethernet switch is a key component of the EK80 system.
If you use more than one Wide Band Transceiver (WBT), a high capacity Ethernet
switch is required. The Ethernet switch is used to connect each Wide Band Transceiver
(WBT) to the Processor Unit.
Related topics
Main system units, page 19
Simrad EK80, page 13
Transceiver Unit description
The EK80 Wide Band Transceiver (WBT) is provided to transmit acoustic energy
through water. This transmission and reception are commonly referred to as a
ping . After
each transmission, the transceiver receives the echoes from the targets in the water and/or
the seabed. These echoes are filtered and amplified and then converted into digital format.
The EK80 software supports several different transceiver units. Several transceivers
may be used simultanously.
Wide Band Transceiver (WBT)
The Wide Band Transceiver (WBT) comprises a rugged
box providing all necessary transmitter and receiver
electronics. The receiver is designed for low noise,
and it can handle input signals spanning a very large
instantaneous dynamic amplitude range. All targets are
correctly measured. The transceiver operates within a
large frequency band, and supports single frequencies,
frequency sweep (chirp) and user defined wave forms.
The Wide Band Transceiver (WBT) is designed for applications where performance
is the top priority. It has four 500 W channels that can either work independently
with single beam transducers, or together with a split beam transducer. The design is
optimized for applications where power consumption and physical size is not critical.
A high quality Ethernet cable connects the Wide Band Transceiver (WBT) to the
Processor Unit. The distance between the Processor Unit and the transceiver can be
extended up to maximum 70 meters. If a longer cable is required, cut it in half, and insert
an Ethernet switch to provide buffer amplification.
The Wide Band Transceiver (WBT) requires an external power supply offering 12 to
15 Vdc, minimum 5 A. A suitable power supply is provided with the delivery. The
transceiver can also be powered by a large capacity battery.
Simrad EK80