Klein 4900 Series Operation And Maintenance Manual page 70

5-4
CHAPTER 5 Technical Description
Control Sensor Interface (CSI) board.
Transmitter board, the Receiver board, the Telemetry board, the sensors, and
the ASCII I/O ports. Specifically, the CSI board performs the following
functions:
• Provides a central connection point for various system command
• Generates the synchronization signals.
• Provides synchronized timing for the Transmitter board.
• Provides re-clocking of data from the Receiver board to the telemetry
• Provides the controls for the ASCII uplink ports, including those for the
• Provides the command parser for the sensor interface.
• Provides the responder interface.
• Provides the serial EEPROM for the board identification.
• Multiplexes data into ASCII aggregate uplinks.
• Drives the SPI bus interface for sensors, including power, pressure,
• Forwards downlink commands to sensors.
• Provides debug features.
Transmitter board.
transmitters, each of which outputs a chirp transmit waveform to a transducer
array during each ping cycle in accordance with a trigger signal from the CSI
board. The chirp waveform, frequency sweep and pulse width for each cycle
are generated by the Transmitter board for each transmitter in accordance with
command and control and clock inputs from the CSI board. The Transmitter
board is powered with 12 VDC and 200 VDC from the CSI board.
Receiver board.
differential input receivers which input and amplify the sonar signals from
preamplifiers in the transducer arrays. The amplified signals are output to a
high speed 16-bit analog-to-digital converter (ADC), one for each receiver,
and the digitized sonar data are processed, downsampled and output to the CSI
board in accordance with command and control and clock signals from the CSI
board. The Receiver board is powered with 12 VDC from the CSI board and
supplies power and a time varying gain (TVG) trigger to the preamplifiers in
the transducer arrays. The Receiver board also provides an enable signal that
switches on a fixed gain in the preamplifiers. This gain is in addition to the
TVG and is operator selectable.
Series 4900 Sonar System Operations and Maintenance Manual
interconnects.
uplink multiplexer.
motion sensor, the compass, the magnetometer, and the pressure sensor.
water/air temperature, and leak detection.
The Transmitter board includes two independent
The Receiver board includes eight broad band, low power
The CSI board interconnects the
P/N 11210091, Rev. 02