Alc (Auto Level Control) - Hitachi HV-D20P Operation Manual

4. In the DIRECT mode, while holding down U button and D button for more than two seconds and press
the D button or in the MENU mode, carry out AUTO SHADING. Thus, color shading in the image is
corrected automatically.
Notes 1) When using the camera for the first time or after replacing the lens, just be sure above instructions.
2) If adjusted under a light source that has a flicker component, such as fluorescent or mercury, the
white balance accuracy can be impaired.
Shutter or Variable) setting to reduce flicker before engaging the auto white balance adjustment.
ALC
In combination of GAIN:AGC, SHUTTER:AES and AUTO IRIS, the following four kinds of ALC (auto level
control) can be performed. This feature ensures stable video signal output according to a wide-range
change in illumination.
Note：
1. AES cannot be combined with a Video type lens.
2. When not using an auto iris lens, at the Lens menu, set Lens Type to DC and Iris Mode to Manual.
50
Change the electronic shutter mode (Sub-menu 1