Edgetech 2000-DSS, User Hardware Manual

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Amplified transmit signals are output to the transducer arrays or received signals are input from the
transducer arrays as follows:
•
J8: Port transducer array receive
•
J14: Starboard transducer array receive
The T/R Switch board also includes four noise reducing receiver preamplifiers, one each for the high and
low frequency port transducer arrays and one each for the high and low frequency starboard transducer
arrays.
POWER AMPLIFIER There are four identical Power Amplifier boards, one each for the
port high (SSH) and low (SSL) frequency transmit signals and one
each for the starboard high and low frequency transmit signals.
+48 VDC is input on J2 from the Power Distribution board, and
the amplified outputs are output on J3 to the T/R Switch board
to drive the transducer arrays. On/off control signals, along with
the low level transmit signals, are input on J1 from the Sonar
Interface board.
CPU The CPU board runs an embedded version of the Microsoft
Windows XP operating system and includes a 512-MB flash
memory with C and D partitions. The C partition contains the
operating system, and the D partition contains the sonar
application software. The CPU board inputs downlink commands
from the 2000 Topside Processor over the Ethernet connection
on J1 with the ADSL Modem board while it outputs the uplink
sonar data to the 2000 Topside Processor over the same
connection. In addition to these functions, the CPU provides the
chirp matched filter processing, power up diagnostic self-tests,
and pointing device and keyboard inputs for factory test. The
COM1 serial port of the CPU board interfaces with an optional
magnetometer, and the USB port interfaces with the Compass
board. +12 VDC power is input from the Power Distribution
board.
SONAR INTERFACE The Sonar Interface board converts the digital chirp high and low
frequency transmit signals for the 100/400-Khz frequency
systems into corresponding low level analog signals which are
output on J9 to the Power Amplifier boards. In addition, signals
from an optional pressure sensor and an internal temperature
sensor are input on J10, the FSK responder trigger signals are
input on J4, and the digitized received sonar signals from the Side
Scan board are input on J7. Test points and indicators for the
transmit signals and IDE interface logic for the Side Scan board