4-9
T/R Switch
The T/R Switch board provides the transmit/receive function for
the side scan transducer arrays, allowing them to be used both
as acoustic transmitters and as acoustic receivers
simultaneously. Transmit signals are input from the Power
Amplifier board as follows:
J1:
Port low frequency transmit
J2:
Port high frequency transmit
J3:
Starboard high frequency transmit
J4:
Starboard low frequency transmit
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 7 operating system and includes an 8 GB SATADOM
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 Computer over the Ethernet connection
on J1 with the ADSL Modem board while it outputs the uplink
sonar data to the 2000 Topside Computer over the same
connection. In addition, 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.
Summary of Contents for 2000-CSS
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