VIVOTEK
Measurement Window: This function allows user to set measurement window(s) for low light compesation.
■Full view: Calculate the full range of view and offer appropriate light compesation.
■BLC: When selected, a BLC window will appear on screen meaning that the center of the scene will be taken as a weighed area. This option enables light compensation for images that are too dark or too bright to recognize; for example, for the dark side of objects that is posed against bright sunlight.
Exposure control:
■Exposure level: You can manually set the Exposure level, which ranges from
■Flickerless: This function helps avoid the flickering on images because of the fast shutter movement and the inconsistency between power line frequency (50 or 60Hz) and exposure time. 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 q long exposure time is satisfactory.
■Exposure time: The Exposure time allows tuning for more or less light to enter the lens. The configurable value ranges from 1/32000 to 1/5 of a second. An optimum shutter speed should be maintained as long as the light level of the scene permits.
■Gain control: Tune the slider bar to set the Gain Control to the best image quality. Higher gain control value will generate a certain amount of noise, and that the gain control, lighting levels, and picture performance are closely related.
Note that you can split the round pointers on the Exposure time and Gain control slide bars into two halves and drag them on the bars to designate a range of values in which firmware can automatically adapt to. Firmware will then automatically tune the Gain, Exposure time, and Iris opening within the ranges you specified.
User's Manual - 51
