User manual
4. Web-based Interface
26 NDF821/NDF821E l User Manual
• Center Weighted: Exposure metering is averaged over the entire frame but the emphasis is
placed on the central area.
• Object Targeted: Dene your target by clicking squares displayed on the image and then
press Save Spot Window to save the setting.
EV: Decrease the value if images appear too light (overexposed). Increase the value if images are
too dark (underexposed).
Convergence Speed: Select the lens’ convergence speed from the drop-down list. Higher the
convergence speed, the faster the lens iris opening responds to changes in light levels.
Shutter Settings:
Slow Shutter: Set the exposure time from a set of xed shutter speeds.
Manual Exposure Time: Manually input a desired exposure time.
Gain Settings:
Max. Gain: Specify the maximum amount of amplication applied to the image. A high level of
gain allows images to be viewable in very low light, but will increase the image noise.
Manual Gain: Select a gain value from 0 to 16.
ICR Control
The camera incorporates an IR cut lter. In ICR Control you can specify how the camera switches
between color and black/white modes.
Auto: Allows the camera to automatically switch between color and black/white modes.
Forced B/W: Forces the camera stay in black/white mode at all times.
Forced Color: Forces the camera stay in color mode at all times.
External: Enable this option if an external alarm input device is connected to control the IR cut
lter.
• Alarm: Set alarm input as 1 or 2 according your actual connection.
• Active: Select (electricity) current status as high or low to dene active status.
BLC (Backlight Compensation)
The Backlight Compensation function allows you to provide the optimal exposure of subjects under
back light circumstances.