Aloka ProSound Alpha 10, Service Manual, Page: 124 / 405

MN2-2008, Rev.2
SECTION 4 Principle of System Operation
4 - 91
4-4-3
Digital Imaging Unit
Digital Imaging Unit consists of the following parts;
CPU part which controls whole ultrasound diagnostic equipment
Mass memory part which stores Ultrasound information
Scan converter part which converts Ultrasound information into SVGA signal in order to
display Viewing monitor
Interface circuit with the peripheral equipment
And this parts has the following features;
&
Most of PC boards use a flash memory for the program ROM. The flash memory is
erasable and rewritable on the board.
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Mass memory part whose capacity is 65,536 records (Ver.3~: 524,288 records, B/W for
Stress Echo: 1,048,579 records) and length varies.
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Scan converter part which adopts 2 dimensional interpolation.
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RGB
#
NTSC/PAL CODEC by digital processing
In addition, the following module/unit are installed in DIU unit.
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Image Processor 2 board of KI/A-SMA, CW and WT unit: EU-9100
(Option, Ver.4.0.0.
and higher)
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Image Processor 3 board of Host Interface unit: EU-9102
(Option for Lite version)
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Peripheral I/O 2 board of DV-800 connection kit: PM-A10-H001/PM-A10-H001B
(Option, Ver.4.0.0 and higher, Only for M00950 and before)
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Peripheral I/O 2 board of DV I/O kit: PM-A10-H006
(Option, Only for M00951 and after)
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DV board of DV output kit: PM-A10-H007
(Option, Only for M00951 and after)
(DV board is mounted on Video Processor board)
BLVDS (Bus LVDS)
Tx/Rx unit sends the Rx data to DIU, every line. This transfer of Rx data use the defined
exclusive bus named Bus-LVDS. Bus-LVDS is prepared 4 separated data bus (called
“LINK”) for B/W, Color(Velocity/Power, Variance and property), Graphic and RF data.
After completed one Rx line, Tx/Rx unit outputs Record Trigger signal to DIU which need
processed data in order to pass beginning of data transfer to them, and receives Trigger
Ready signal from DIU, then send Rx data to DIU via Bus-LVDS,
Tx/Rx unit
Timing Processor Beam Processor 1 Beam Processor 2
Bus-LVDS
Record Trigger
*
Target Ready
)
Digital Imaging unit
Image Processor 1
BLVDS
Rx
Image Processor 3
BLVDS
Rx
B/D
Color
Graphic
RF
BLVDS
Tx
BLVDS
Tx
BLVDS
Tx
(Ver.7~)