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20 C2944M-F (1/09)
DC IRIS LEVEL
Select this option to adjust the electronic properties of the DC drive auto iris lens to the auto iris electronic properties of the camera. Perform this
procedure before using the camera or each time you change the lens.
To perform this procedure, complete the following steps:
1. Focus the camera (refer to Lens Focusing on page 25).
2. Aim the camera at a bright, flickerless scene.
3. Select DC IRIS LEVEL from the MAIN MENU.
4. Adjust the DC IRIS LEVEL value (for the best image). The range is -20 to 20; the default setting is -8.
5. Press the center of the button to save the value.
6. Exit the MAIN MENU.
FLICKERLESS
In some installations, the cycle of the fluorescent lights may interfere with the electronic iris shutter speed. Use this option to override the
shutter speed. When enabled, the shutter speed is set to 1/100 (NTSC) or 1/120 (PAL).
Select ON or OFF. The default setting is OFF.
NOTE: This option appears when AUTO EXPOSURE is set to NORMAL or BLC.
AUTOMATIC GAIN CONTROL
Automatic gain control (AGC) automatically adjusts the image when the light level changes. Most scenes benefit from AGC operation.
Select LOW, HIGH, or OFF. The default setting is LOW.
DAY AND NIGHT
This feature specifies how the camera will switch between day (color) and night (B-W) operation.
Select one of the following day and night options:
AUTO: Switches the filter automatically as light conditions change. The D&N DETECTION and D&N FILTER LIMIT settings appear.
The camera switches from day to night when the AGC gain level reaches 22 dB. It switches from night to day when the AGC gain
level reaches 16 dB.
When AUTO is selected, both the angle of view and the lighting conditions may cause the camera filters to switch constantly.
COLOR: Operates the camera in day mode.
BW: Operates the camera in night mode.
EXT: Enables an external signal to switch between day and night modes (refer to Connecting Day/Night Filter Control on page 14 for
more information). The D&N DETECTION and D&N FILTER LIMIT become enabled. In some installations, this option may be more
reliable than AUTO mode.
NOTE: When AGC is disabled, AUTO is not available; you can select only COLOR or B-W mode.