Klein 5000 V2 Series, Operation And Maintenance Manual

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TPU
5-5
5.2 TPU
A block diagram depicting the functional relationships of all of the printed circuit
boards in the TPU electronics is shown in Figure 5-3. These boards are located in
the TPU electronics chassis as shown in Figure 5-4. The printed circuit boards,
along with their corresponding part numbers, are the following:
• Demultiplexer board 14105785
• CPU board 14105873
• High Voltage Power Supply board 11700098
• 200V Power Filter board 14104980
• Topside Telemetry board 14105841
• 12V Power Filter board 14105397
• 12V Power Supply board 11700092
• LED board 14105464
Assembled into a single rack mountable 3U enclosure, the TPU connects to the
towfish directly or by way of an optionally supplied winch. It also connects to the
SonarPro Workstation over an Ethernet connection and to customer supplied
equipment, such as a GPS and an acoustic positioning system.
Demultiplexer board.
The Demultiplexer board demultiplexes the uplink
sonar and sensor data from the towfish and outputs FSK downlink commands
along with 200 VDC power to the towfish while providing all of the external
input and output signal and data connections for the TPU. It also provides the
required recovery of signal and clock, detects trigger inputs and 1-PPS signals,
generates the trigger outputs, inputs NMEA 0183 data, time stamps all of the
data, and outputs the data to the SonarPro Workstation over the Ethernet
connection. 200 VDC power is input to the Demultiplexer board from the
200V Power Filter board, and 12 VDC power is input from the 12V Power
Filter board. The Demultiplexer board also provides front panel indicator
outputs which drive the front panel LEDs on the LED board.
CPU board.
The CPU board functions as the command and data interface
between the SonarPro Workstation 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.
High Voltage Power Supply board.
The High Voltage Power Supply board
provides 200 VDC which is output to the towfish to power it.
200V Power Filter board.
The 200V Power Filter board provides noise
filtering of the 200 VDC power for transmission to the towfish over the coaxial
tow cable. The filtered 200 VDC power is output to the Demultiplexer board
where it is combined with the FSK control signals and output to the towfish.