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Towfish
5-5
Transition board.
The Transition board provides the means to connect the
large gauge wires from the RX PORT and RX STBD bulkhead connectors on
the end cap to the Receiver board’s 50 pin ribbon cable and to the Transmitter
board’s 3-pin connectors.
+12 VDC Power Supply board.
The +12 VDC Power Supply board inputs
100–240 VDC on connector P1 from the Power Filter board’s connector JP1.
The +12 VDC output from the Power Supply board on P2 is also connected to
connector JP1 of the Filter board.
24 VDC Power Supply board.
The +24 VDC Power Supply board inputs
100–240 VDC on connector P1 from the Power Filter board’s connector JP1.
The +24 VDC output from the Power Supply board on P2 is also connected to
connector JP1 of the Filter board.
Power Filter board 12 VDC.
Voltages are filtered by the Power Filter boards
to and from the CSI board. The interconnection is from JP2 of the Power Filter
board to JP18 (12 V) of the CSI board.
Power Filter board 24 VDC.
Voltages are filtered by the Power Filter boards
to and from the CSI board. The interconnection is from JP2 of the Power Filter
board to JP19 (24 V) of the CSI board.
Subsea Telemetry board.
The Subsea Telemetry board provides the cable
interface for the towfish. Specifically, the Subsea Telemetry board performs
the following functions:
• Separates the uplink data signals, the downlink command signals and the
towfish power.
• Acquires sonar and sensor data from the CSI board and transmits the
combined data to the SP-III TPU or Rack Mount TPU.
• Receives and interprets command and timing signals from the SP-III TPU
or Rack Mount TPU.
• Matches the time references at the tow fish and the SP-III TPU or Rack
Mount TPU.
5.1.2 Transducer Arrays
The transducer arrays contain transducer elements that both transmit and receive
the acoustic signals. They also include two 2-channel embedded preamplifiers
each which are powered from the Receiver board. The preamplifiers provide
filtering and both 12 dB of fixed gain and 48 dB of TVG to the received sonar
signals where the TVG is triggered from the Receiver board. The 12 dB of fixed
gain is on or off operator selectable. Along with the TVG to compensate for the
acoustic spreading loss, the preamplifiers increase the signal-to-noise ratio of the
received signals before they are output to the Receiver board.
Содержание MA-X VIEW 600
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