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10
Basic Functions
Exposure Compensation
Exposure compensation is a function which offsets the
internal reference brightness level used in the AE
mode by steps of 1.5 dB.
Data Step
Setting value
0E 7 10.5 dB
0D 6 9 dB
0C 5 7.5 dB
0B 4 6 dB
0A 3 4.5 dB
09 2 3 dB
08 1 1.5 dB
07 0 0 dB
06 –1 –1.5 dB
05 –2 –3 dB
04 –3 –4.5 dB
03 –4 –6 dB
02 –5 –7.5 dB
01 –6 –9 dB
00 –7 –10.5 dB
Aperture Control
Aperture control is a function which adjusts the
enhancement of the edges of objects in the picture.
There are 16 levels of adjustment, starting from “no
enhancement.” When shooting text, this control may
help by making the text sharper.
Back Light Compensation
When the background of the subject is too bright, or
when the subject is too dark due to shooting in the AE
mode, back light compensation will make the subject
appear clearer.
Slow Shutter – Auto/Manual
When the Slow Shutter is set to “Auto,” this ensures
that the slow shutter is engaged automatically when the
brightness drops. This occurs only when the AE mode
is set to “Full Auto.”
“Slow Shutter Manual” is the factory setting.
ICR (IR Cut-Removable) Mode
An infrared (IR) Cut-Filter can be disengaged from the
image path for increased sensitivity in low light
environments. The ICR will automatically engage
depending on the ambient light, allowing the camera to
be effective in day/night environments.
Auto ICR Mode
Auto ICR Mode automatically switches the setting
needed for attaching or removing the IR Cut Filter.
With a pre-set level of darkness, the IR Cut Filter is
automatically disabled (ICR ON), and the infrared
sensitivity is increased. With a pre-set level of
brightness, the IR Cut Filter is automatically enabled
(ICR OFF). Also, on systems equipped with an IR
light, the proper decisions are made to avoid
inappropriate operations.
The following three threshold levels are available to
switch the ICR ON or OFF.
• 1st threshold level
• 2nd threshold level
• 3rd threshold level
Threshold level at which ICR is switched from ON
to OFF:
1st threshold level: The VISCA command allows
you to set this level.
2nd threshold level: Fixed value
Threshold level at which ICR is switched from OFF
to ON:
3rd threshold level: Fixed value
When ICR is OFF
When the iris opens, and the light is darker than the
maximum AGC value, ICR is switched from OFF to
ON. (Refer to the figure below)