Vivotek -M Marine Radio User Manual


 
VIVOTEK
56 - 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.
Exposure control:
Exposure level: You can manually set the Exposure level, which ranges from -2.0 to +2.0 (dark
to bright). You can also select other values from the Exposure mode menus and select a preferred
scenario or manually congure the associated settings. 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.
Exposure mode:
Select Auto, Shutter Priority, Iris Priority, Quality Priority, or Manual mode according to your needs.
- Auto: System default, which automatically adjusts the iris, shutter speed, and gain for an optimmal
exposure level.
Manual: (Note that some of the Manual options will be disabled when WDR Pro is enabled!)