L3 comminications SERIES 5000, Operation And Maintenance Manual

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1-1
CHAPTER 1: O
VERVIEW
he
Series 5000 Sonar System displays sonar data on a high resolution
monitor and will store data on both the hard disk drive and a CD for high
capacity storage. Many optional accessories may be added to the basic
system for special situations or applications. This sonar equipment provides the
capability for precision swath imaging of the sea floor.
1.1 Equipment
The Series 5000 Sonar System equipment consists of a multibeam sonar
instrumented towfish, a Transceiver and Processing Unit (TPU), and a Windows
Computer Display and Control Unit (computer), along with a tow cable and
various interconnect cables.
1.1.1 Multibeam Sonar Instrumented Towfish
The towfish electronics perform all the sonar data processing prior to digital
transmission to the sonar TPU. This minimizes the system’s susceptibility to
externally induced electronic noise. Processing includes transmit/receive
functions, time varied gain (TVG) amplification, digitalization, and multiplexing
of the sonar uplink data. Timing and sonar data are bidirectionally multiplexed on
a single conductor coaxial cable. Use of a low noise preamplifier design ensures
maximum range performance. The ability to operate with a fiber-optic cable is
available as an option for very long cable (deep tow) operations or installations
requiring electrical isolation in severe noise environments.
An electro-mechanical termination is provided on the towfish end of the tow cable
for connection to the towfish. A tow shackle provides a strong, reliable,
mechanical termination to the towfish tow bracket. An underwater connector on a
pigtail connects the tow cable electrically to an underwater jumper cable on the
towfish.
1.1.2 Transceiver and Processing Unit (TPU)
The TPU contains the electronics for sonar data demultiplexing and data
processing.
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