Sp-Iii Tpu - Klein 4900 Series Operation And Maintenance Manual

5-6
CHAPTER 5 Technical Description
5.2

SP-III TPU

The SP-III TPU provides signal processing along with the system control and data
telemetry functions. The printed circuit boards, along with their corresponding part
numbers, are the following:
• Demux board
• CPU board
• Topside Telemetry board
• Power Integration board
• Panel Interconnect board
• Power Supply
• Fan
All of these components are shown in Figure 5-4, and a block diagram of the
SP-III TPU electronics is shown in Figure 5-3.
Demux board.
between the towfish and the CPU. DC power and telemetry commands are
transported down to the towfish, while sonar and sensor data transported up
from the towfish are decoded and passed along to the CPU.
CPU board.
between the laptop computer running SonarPro and the tow fish. It executes a
real-time data server which outputs sonar and sensor data to and receives
commands from an external client, such as SonarPro.
Topside Telemetry board.
interface for the SP-III TPU. Specifically, the Topside Telemetry board
performs the following functions:
• Separates the uplink data signals, the downlink command signals and the
• Acquires sonar and sensor data and reformats the data as required for the
• Generates command and timing signals for the towfish.
• Matches the time references at the tow fish and the SP-III TPU.
Power Integration board.
the towfish from either a 12 VDC or a 88–264 VAC, 47–63 Hz source. It also
provides filtering, reverse polarity protection, and fusing of the input power.
Panel Interconnect board.
mechanical cable interface to the various external connectors in the system.
Series 4900 Sonar System Operations and Maintenance Manual
The Demux board functions as a data and power interface
The CPU board functions as the command and data interface
towfish power.
Demux board.
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14105209
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14105343
The Topside Telemetry board provides the cable
The Power Integration board provides 200 VDC to
The Panel Interconnect board facilitates a simple
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