Aloka ProSound Alpha 10, Service Manual, Page: 149 / 405

MN2-2008 Rev.1
SECTION 8 Performance Check
8 - 5
3) Image adjusting function
The following functions must operate normally.
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B-GAIN
In B/M mode, both gains must be adjusted by turning the GAIN control knob (CW:
Increase, CCW: Decrease).
The GAIN display must change from 30 to 90.
* The gain display for M-mode is depend on preset setting of GAIN(M).
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STC
The gains of the B mode image must be adjusted corresponding to their depths. When all
the STC controls are centered, they must be free of excessive variations in sensitivity.
" )
MAGE FREQUENCY (Freeze OFF)
When you select the Image Freq (B/M) on the LCD touch panel in B mode, the
frequency of the ultrasound must be switched.
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FRAME CORRELATION (Freeze OFF)
For the B mode image, the level of frame correlation must be adjusted by Frame
Corre(B) on the LCD touch panel.
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AGC (Freeze OFF)
The AGC for the B mode image must be adjusted by turning the AGC(B) on the LCD
touch panel.
The AGC display must change from A1 to A15.
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SMOOTHING(B) (Freeze OFF)
In the B/M mode, the smoothness of B mode image must be adjusted by Smoothing(B)
on the LCD touch panel.
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CONTRAST (Freeze OFF)
The contrast of the M mode image must be adjusted by Contrast(M) on the LCD touch
panel.
The contrast display must change from C1 to C16.
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M/D-GAIN (Freeze OFF)
The gain of both M mode and Doppler mode images must be adjusted by turning the
M/D-GAIN control knob (CW: Increase, CCW: Decrease).
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ACOUSTIC POWER (Freeze OFF)
The image sensitivity must change by pressing the ACOUSTIC POWER switch in B
mode and turning the rotary encoder.
The DVA display must change corresponding to the adjustment.
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SAMPLE VOLUME (Freeze OFF)
In the PW mode, the size of sample volume must be adjusted by Sample Volume on the
LCD touch panel.
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DOP FILTER (Freeze OFF)
In the PW mode, the noise around the baseline must change by Filter(D) on the LCD
touch panel.
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FLOW-GAIN (Freeze OFF)
The gain of the Flow mode image must be adjusted by turning the FLOW-GAIN control
knob (CW: Increase, CCW: Decrease).
The GAIN display must change from 00 to 127.