Klein Marine Systems, Inc. HydroChart 5000, Operation And Maintenance Manual

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1-1
CHAPTER 1: O
VERVIEW
The HydroChart 5000 Sonar System is a portable, high speed hydrographic survey
system which has the ability to simultaneously collect IHO-quality bathymetry and
co-registered, high resolution multibeam side scan sonar data.
1.1 Equipment
The HydroChart 5000 Sonar System equipment consists of an instrumented Sonar
Head Unit, a Transceiver and Processing Unit (TPU) and a SonarPro Workstation,
along with a deck cable and various interconnect cables.
1.1.1 Sonar Head Unit
The Sonar Head unit has all of the necessary electronics and acoustic
instrumentation to perform all of the sonar data acquisition and processing prior to
digital transmission to the TPU. Processing includes transmit and 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, and the use of a low noise preamplifier design
ensures maximum range performance. The Sonar Head Unit has a flange assembly
which easily mates with typical customer provided over-the-side mount pole or
ram configurations. A jumper cable connects from the sonar electronics in the
Sonar Head Unit to the deck cable, and the deck cable connects to the TPU to
provide the electrical power and data connections.
1.1.2 TPU
The TPU is housed in a 19-inch rack mountable 2U chassis and connects to the
Sonar Head Unit directly using a deck cable. The TPU receives and demultiplexes
the sonar and sensor data from the Sonar Head Unit and transfers the data to the
SonarPro Workstation over an Ethernet connection. The TPU can also input
standard National Marine Electronics Association (NMEA) 0183 message
sentence formats from a connected GPS, and a 1 PPS input is provided which
inputs 1 PPS (one pulse per second) signals from the GPS. This signal is used in
conjunction with a NMEA $ZDA message input to add an accurate time stamp to
the data. The TPU provides power and downlink commands to the Sonar Head
Unit by combining 200 VDC with FSK control signals for transmission over the
coaxial conductor in the tow cable. In addition, the TPU initiates each ping cycle
to the side scan sonar and provides a trigger signal simultaneously with the
responder trigger generated in the Sonar Head Unit for use with an acoustic
positioning system.