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24 C3463M (10/09)
IR CUT FILTER
Spectra IV dome systems have two modes of operation: color, and black-white. You can increase sensitivity in low light conditions by switching
to black-white mode (removing the IR cut filter). Color mode is preferred in normal lighting conditions.
The following are the settings for the IR cut filter:
OFF: Manual operation is controlled by preset 88 (filter IN) and 89 (filter OUT).
AUTO (default): Automatic operation is controlled by the auto IR level setting.
IN: Images are always displayed in color mode.
OUT: Images are always displayed in black-white mode.
Note: The IN and OUT settings are only available when editing camera settings through the Presets menu (refer to Presets on page 34).
Low Light Focus
(Applies only to 27X and 35X models.)
If you are using an IR illuminator, the low light focus feature of the camera can be tuned to correspond to the setting of the illuminator.
There are three low light focus settings:
OFF (default): Low light focus is not activated.
850NM: Low light focus is tuned to 850 nm (nanometers).
950NM: Low light focus is tuned to 950 nm.
Auto IR Level
The auto IR level is the light level at which the infrared filter switches IN or OUT.
Following are the available settings for the auto IR level:
DUSK (default): Approximately 6 lux (black-white); approximately 13 lux (color).
DARK: Approximately 0.1 lux (black-white); approximately 2 lux (color).
Notes:
• If backlight compensation is ON and the IR cut filter switches OUT in normal lighting conditions, adjust the Auto IR Level to a darker setting.
Refer to Backlight Compensation on page 26.
• Low light does not mean no light. Some type of illumination is required (street light, IR light, etc.). The camera is not sensitive to IR light
when the IR cut filter is IN.