CHEETAH 3G-SDI Camera
November 16, 2017
Page
27
of
53
Rev 1.1
3.5.1 Exposure Control
Exposure control
lets you set the camera’s exposure time
manually from the
Time tab, Shutter Speed tab, or Wheel Degrees tab. The exposure time that you
set on any tab automatically adjusts the exposure time in microseconds on the
other two tabs. You can use a combination of exposure time and gain
adjustments to achieve image luminance goals for your specific applications.
For best image quality, always increase the exposure to the maximum allowable
level before adding gain. Use gamma settings found on the Image Control screen
to stretch the dark regions of the image to achieve a better match with the
display characteristics of the monitor.
Time Tab
The Time tab controls the ability to set the exposure time on any of the tabs
(Figure 17). If you enable
Internal
, the Exposure Time slider shows you the
minimum and maximum exposure times available.
1.
Click
Off
to disable setting manual exposure time. The exposure time is
then set equal to the frame time.
2.
Click
Internal
to enable setting manual exposure time.
a.
Use the slider to set the exposure in microseconds or enter the
desired exposure in the box.
b.
Use the up/down scroll to fine tune the exposure setting.
Figure 17: Time tab.
Shutter Speed Tab
Use shutter speed to set the exposure in fractions of a second as is customary
with standard photographic cameras. Select from a drop-down list of shutter
speeds. After selecting a shutter speed, the equivalent exposure time in
microseconds appears in the up/down slider.
Figure 18: Shutter Speed tab.
Wheel Degrees Tab
The Wheel Degrees represents the exposure as the rotating mechanical shutter
used in motion film cameras. It lets you set the exposure time in degrees from
