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No. 2D730-148E*O
4.
OPERATION OF EACH PWB
4.1
Front-End Unit
(1)
Outline
The front-end
unit consists of the Transducer
Interface board (TI), the three Transmit/Receive
boards (TR), the Receive Control board (RC), and the Continuous
Beamformer
board (CB).
(2)
Composition
Transducer
Interface board (TI)
The TI board includes the three array transducer connectors and the CW pencil
transducer
connector.
This board enables switching between the transducers.
Transmit/Receive
boards (TR)
Simultaneous
transmission/reception
for a maximum of 192 channels is performed on
the three TR boards.
In addition, the transmission delay control and reception gain
control functions are provided.
Receive Control board (RC)
This board performs reception phasing/addition
in quad signal processing (up to 192
channels).
In addition, the Real Time Control circuit (RTC), which controls the front-end
unit, is provided.
Continuous
Beamformer
board (CB)
This board performs reception phasing/addition
control and quadrature
detection for the
SCW by inputting 64 channels.
This board includes the signal processing circuit, ADC,
and dedicated transmission/reception
circuit for the Pencil CW.
4-l
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