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VIVOTEK
■ Flickerless: Under some circumstances when there is a difference between the video capture
frequency and local AC power frequency (NTSC or PAL), the mismatch causes color shifts or
flickering images. If the above mismatch occurs, select the Flickerless checkbox, and the range
of Exposure time (the shutter time) will be limited to a range in order to match the AC power
frequency. When selected, the exposure time will be forced to stay longer than 1/120 second.
For cameras that come with fixed iris lens, setting the exposure time to longer than 1/120 second
may introduce too much lights to the lens. Users can use this option to observe whether the
result of long exposure time is satisfactory.
You can click and drag the semi-circular pointers on the Exposure time and Gain control slide
bars to specify a range of shutter time and Gain control values within which the camera can
automaticallly tune to an optimal imaging result. For example, you may prefer a shorter shutter
time to better capture moving objects, while a faster shutter reduces light and needs to be
compensated by electrical brightness gains.
■ AE Speed Adjustment:
This function applies when you need to monitor fast changing lighting conditions. For example,
the camera may need to monitor a highway lane or entrance of a parking area at night where
cars passing by with their lights on can bring fast changes in light levels. The same applies if
the camera is installed on a vehicle, and when it needs to adapts to fast changes of light when
entering and leaving a tunnel.
■ WDR:
This refers to the Wide Dynamic Range function that enables the camera to capture details in
a high contrast environment. Use the checkbox to enable the function, and use the slide bar
to select the strength of the WDR Pro functionality, depending on the lighting condition at the
installation site. You can select a higher effect when the contrast is high (between the shaded
area and the light behind the objects).
You can click Restore to recall the original settings without incorporating the changes. When
completed with the settings on this page, click Save to enable the settings.
If you want to configure another sensor setting for day/night/schedule mode, please click Profile
mode to open the Profile of exposure settings page as shown below.
Activated period: Select the mode this profile to apply to Night mode or the Schedule mode. Please
manually enter a range of time if you select the Schedule mode. Then check the Save button for the
configuration take effect.
54 - User's Manual
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