Klein 5000 Series Operation And Maintenance Manual page 20

1-6
CHAPTER 1 Overview
Multiplexer board.
the transducer sub-array channels along with the signals from the sensors,
encodes the data, and transmits a high baud rate digital data stream to the TPU
via the tow cable. The Multiplexer board also receives the trigger signal and
command messages which instruct the Transmitter board to fire the arrays and
configure aspects of Sonar Electronics operation. The Multiplexer board also
acts as a motherboard for the other boards providing the connections and
distributing power.
The Multiplexer board uses a proprietary sampling scheme that preserves the
phase of the individual channel signals, but only requires a single A/D
converter, thereby reducing cost and power consumption while eliminating the
phase mismatch between converters of alternate dual converter schemes. The
output of the A/D is input to the data encoder and converted to serial data for
subsequent transmission up the tow cable.
A full duplex hybrid allows data transmission up the cable while
simultaneously receiving the FSK trigger signals and power. The downlink
signals are input to FSK demodulators, and the baseband outputs are routed to
the Transmitter board, indicating when to fire the main array, and to a micro
controller that handles Sonar Electronics configuration.
1.3.3
The Sonar Processor provides signal processing along with the system control and
data telemetry functions. The Sonar Processor is composed of an Intel based
processor in a PC-104 form-factor, a demultiplexer and 5 VDC and 3.3 VDC
power supplies. A block diagram of the Sonar Processor is shown in Figure 1-5.
Series 5000 AUV V2 Sonar System Operations and Maintenance Manual
The Multiplexer board digitizes the signals from each of
Sonar Processor
Sonar Processor Block Diagram
Figure 1-5:
P/N 11214513, Rev. 02