User's Manual

20
5. ALC
1) PEAK/AVE : Set auto level control for Peak or Average in 4 steps of 50/50, 25/75, 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.
2) OVER RIDE : Auto level setting
ALC level setting in range of -128 to 127 (about
±
2 F stops). Press R and L for 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 : Normal setting
•
FAST : Quick response to scene light variations. Use where variations are sudden, such as
when changing a microscope magnification.
4) ALC GATE : ON/OFF toggle
•
ON : Video signal is detected in the ALC Gate area for controlling AGC, lens and auto electronic
shutter and ALC.
Note: The detect area cannot be seen on the screen, the ALC control functions for the iris gate.
•
OFF : The overall video signal is detected for ALC control
5) ALC GATE SEL : Select ALC gate pattern
Select pattern from among Modes 1, 2, 3, 4, 5 and 6. Use according to scene conditions.