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C311M-O (11/07) 35
BACKLIGHT COMPENSATION
There are two backlight compensation modes:
• On: The system uses the center 10 percent of the picture to adjust the iris. If there is a bright light source outside of this area, it will wash
out to white. The camera will adjust the iris so that the object in the sensitive area is properly exposed.
NOTE: (Applies only to 24X and 35X models.) If backlight compensation is ON and the IR cut filter switches OUT (black-white mode) in
normal lighting conditions, adjust the Auto IR Level to a darker setting. Refer to Auto IR Level on page 30.
• Off: Backlight compensation is not activated.
To change the backlight compensation mode:
1. Program preset 95 (28). The main menu appears.
2. Position the cursor (>) beside Camera.
3. Press the Iris Open button to enter the Camera menu.
4. Position the cursor (>) beside Backlight Comp.
5. Press the Iris Open button. The cursor moves to the right, beside On or Off.
6. Move the joystick up or down to toggle between On and Off.
7. Press one of the following buttons on your keyboard:
• Iris Open: Press the Iris Open button to select your choice.
• Iris Close: Press the Iris Close button if you do not want to change the setting.
Backlight comp Off
Zoom limit x- -
Reset camera
<Gain/AGC>
<Auto iris>
Next
Exit
Camera Menu
MAIN MENU
<Camera>
<Line Sync>
<Power Up Mode>
<Wiper>
<Limit Stops>
<Text Display>
<Alert>
<Other>
ACK Alert
Exit
NON-SENSITIVE AREA
SENSITIVE
AREA