Chapter 5: Technical Description; Towfish; Sonar Electronics - Klein 4000 Series Operation And Maintenance Manual

CHAPTER 5: T
This chapter provides an overall technical description of the Series 4000 Sonar
System towfish, TPU and SP-III 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.
5.1

Towfish

The towfish transmits and receives the sonar signals, processes them and outputs
the processed sonar and sensor data to the TPU or the SP-III TPU over the tow
cable. The primary active components of the towfish are the sonar electronics and
the two transducer arrays. An optional magnetometer and responder can also be
included. The compass and the pressure and temperature sensors are contained
within the tail cone.
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.
The printed circuit boards, along with their corresponding part numbers, that make
up the towfish electronics are the following:
• Control Sensor Interface (CSI)
• Subsea Telemetry
• Transmitter
• Receiver
• Transition
• 12 VDC Power Supply and Filter
• 24 VDC Power Supply and Filter (optional)
ECHNICAL

Sonar Electronics

D
ESCRIPTION
14105398
14105647
14105393-01
14105630
14105645
11700092
11700093
5-1