Alc - Hitachi HV-D30 Operation Manual

6) KNEE : Knee OFF/ON/AUTO
The on setting provides natural gradation in bright portions. At the auto setting,
gradation in bright components is automatically optimized even with scene changes.
Knee is fixed to on in the Auto CAM mode.
7) SHADING MODE mode : Auto shading setting
COLOR
LUMINANCE: Equalizes vertical RGB signal levels. Use for special optics such
FLAT
If shading is large or random, compensation error increases. In such cases, adjust
for uniform lighting.
8) AUTO SHADING
Press R for automatic shading adjustment. See further description on Page 36.
9) AUTO BLACK: Press R for automatic black balance adjustment.
10) FILE SELECT: Select scene file from among 1, 2, 3 and 4.

5. ALC

1) PEAK/AVE : Set auto level control for Peak or Average in 4 steps of 50/50, 25/75,
2) OVER RIDE : Auto iris level setting
ALC level setting in range of -128 to 127 (about
respectively higher or lower video level settings. Press both L and R for about 2
seconds to set to 0.
3) SPEED: AGC and AES response speed
SLOW : Slow response to scene light variations. Allows a stable image when a
strong light source, e.g., vehicle headlights, enters the scene.
STANDARD
FAST : Quick response to scene light variations.
sudden, such as when changing a microscope magnification.
: Minimize vertical shading in image. Use for general scenes.
as microscope or inspection devices.
: Equalizes overall image RGB signal levels.
microscope perimeter shading and inspection devices.
18/85 or 0/100. At high Average setting, background may be difficult
to see in picture bright components. Increasing the Peak setting may
render spotlighted components easier to see.
: Normal setting
Effective for
2 F stops). Press R and L for
Use where variations are
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