Chapter 5: Technical Description; Towfish; Sonar Electronics - Klein 5000 V2 Series Operation And Maintenance Manual

CHAPTER 5: T
This chapter provides an overall technical description of the Series 5000 V2 Sonar
System towfish and TPU electronics. This information, which includes block
diagrams, printed circuit board descriptions, and chassis photos with callouts, is
useful when performing any troubleshooting tasks and when installing optional
equipment.
The Series 5000 V2 Sonar System departs from previous multibeam systems in
that the swath forming process is implemented digitally using digital signal
processing (DSP), rather than analog delay lines, phase shifters, or multipliers and
adders. The primary advantage of this technique is a reduction in the size and
weight of the towfish. This affords a accompanying reduction in the size of the
required survey vessel and ancillary equipment, such as a winch and crane. Other
advantages include more flexibility in the swath processing, allowing software
control of operating parameters. Previously this would have required hardware
changes.
5.1

Towfish

The towfish transmits and receives the sonar signals, processes them and outputs
the processed sonar and sensor data to the TPU over the tow cable. The primary
active components of the towfish are the sonar electronics and the two transducer
arrays. Heading, pitch, roll, and pressure sensors are also included, and an optional
responder and an altimeter can also be included.
5.1.1
A block diagram depicting the functional relationships of all of the printed circuit
boards in the sonar electronics is shown in Figure 5-1. All the boards are located
on the towfish electronics chassis which is shown in Figure 5-2 on page 5-3.
The printed circuit boards, along with their corresponding part numbers, that make
up the towfish electronics are the following:
• Transmitter
• Receiver (2)
• Sensor Interface
• Multiplexer
• Power Supply
• Compass board
ECHNICAL

Sonar Electronics

w/o bathymetry
14104530
14104548
14102038-01
14104941
14104506
14104940
D
ESCRIPTION
w/bathymetry
14104530
14104932-02
14102038-01
14104941
14104506
14104940
5-1