5 - 8 WS80A Service Manual
Ultrasound System Part
Its major function is to process the ultrasound data prior to the Scan Converter. Also, it
performs some functions of Front End Part and Back End Part. This detects probes and sends
system information and application information in accordance with user environment to each
Board. It performs TX Focusing and RX Focusing based on such information. When high
voltage Pulser is sent to the probe according to TX Focusing, ultrasonic waves are generated;
echo signals returning from the body go through an amplification circuit to undergo Digital
Beamforming processing. The RF signal obtained here goes through various filtering and
processing to generate image signals such as BW, Color Doppler, PW Doppler, CW Doppler,
Power Doppler, etc., which are sent to the PC Module to be implemented on the monitor.
The DC to DC Power Module supplies power to the Ultrasound System Part.
The Ultrasound System Part consists of the following:
• PSA(Probe Select Assembly) Board
• AC(Analog Control)
• BF(Beamformer) Board
• BE(Back End Board)
• DDM (DC to DC Power Module)
• CW (Continuous Wave Board): currently not supported
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