Vivotek 63E-M User Manual download pdf (Page 54)

VIVOTEK

54 - User's Manual

- Shutter Priority: When selected, the Exposure time slide bar will appear, allowing you to select an

exposure time ranging from 1/10,000, to 1/1 second. Once a xed value is selected, system rmware

will automatically tune the gain and iris settings to match an optimal exposure level.

- Iris Priority: When selected, the Iris adjustment slide bar will appear, allowing you to select

an aperture size ranging from F14 to F1.6. Once a fixed value is selected, system firmware will

automatically tune the gain and exposure time to match an optimal exposure level.

The value is

measured in the F-number as the ratio of the focal length to the lens diameter. Iris size is inversely

proportional to the F-number; therefore, the smaller the F-number, the greater is the exposure ratio.

Smaller F-number (larger exposure ratio, largest size of lens aperture opening) is shown on the right of

the slide bar.

- Quality Priority: When selected, the embedded mapping table of aperture size and depth of eld will

apply when operating with the auto focus mechanism.

- Manual: Select Manual to set a xed exposure time, iris, and gain. Then, tune the slide bar to set the

Exposure time, Iris adjustment, and Gain Control to the best image quality. A shorter exposure time

allows less amount of light to enter the sensor; while a higher gain control value generates certain

amount of noises.

Note the following when the Manual mode is selected:

1. The Exposure level bar will not be available.

2. The IR cut lter setting will switch to Day Mode. If it was previously congured into other modes,

the previous setting remains intact.

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Vivotek 63E-M User Manual Page 54