Illustra Pro PTZ 30x Configuration User Manual page 27

Picture Settings
Deselect the Auto Focus check box to disable auto focus.
The default setting is 'Enabled'.
5 Select the Auto Iris check box to enable auto iris.
OR
Deselect the Auto Iris check box to disable auto iris.
The default setting is 'Enabled'.
Setting Exposure
Configure the exposure settings for the camera. Automatic Gain Control (AGC) and Open Shutter provide
additional functionality to help compensate for low-light scenes
Automatic Gain Control (AGC)
AGc amplifies the video signal in scenes when there is not enough light to produce full video levels. The maximum
level of AGC is controlled by the Max Gain control. It is adjustable from 0dB (off) to 37dB. As gain is increased,
the sensor noise is also amplified which can result in more noticeable noise in the image.
Open Shutter
This is a technique that is used for really low-light performance applications. It allows the shutter speed to be
slowed down further than normal to allow the sensor to collect more light. The maximum level of Open Shutter is
controlled by the Shutter Speed control. It is adjustable from 1/30 down to ½ second. The slower the Shutter
Speed, the higher the chance for image blur which may affect moving object identification. It is only in effect
during low-light situations where an image would not be obtainable otherwise and does not affect the camera
performance in normal or bright light situations.
Max Gain
The Max Gain setting is an upper limit for how much gain can be increased when AGC is enabled. The trade-off
between picture level (brightness) and noise may be adjusted by setting the Max Gain value. Lower values for
Max Gain setting may result in a darker picture, but with less noise. Higher values for Max Gain setting may result
in a brighter picture, but with more noise
Procedure 3-3 Configure Exposure Settings
Step Action
1 Select Setup on the GUI banner to display the setup menus.
2 Select Picture Settings from the Video menu.
3 Select the Picture Basic tab.
4 Select
5 Select a ACC/Shutter Setting from the drop-down menu.
• AGC off - produces the cleanest image with the least noise but the worst low-light per-
formance.
• AGC on - good low-light performance with the chance for some noise.
• openshutter - best for low-light performance. However there is a chance for some noise and
some image blur.
Illustra Pro PTZ Configuration & User Guide
to start the video stream if it is not already active.
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