CB-5222 User and Installation Guide
56
Caution:
Using a slow shutter speed causes moving objects to be blurred.
Attention:
L'utilisation de vitesses d'obturation faibles peut rendre les objets en mouvement flous.
To set the Exposure mode
From the
Auto Mode
Max Gain
drop-down list, set the maximum gain in 3db steps from
Off
to 54dB. Increasing the gain lightens dark pictures resulting from low-level lighting.
The default setting is 36dB.
Caution:
The noise level might increase if the gain level is set too high in low-light scenes.
Attention:
Le niveau de bruit peut augmenter si le niveau de gain est trop élevé dans les scènes
à faible luminosité.
Select one of the following modes:
Auto Iris
– This mode is recommended to be used in indoor environments involving
mixed lighting sources where the main source is fluorescent lighting combined with
natural light that enters the scene through windows and other exposed areas.
This mode limits the shutter speed in order to prevent flickering. The exposure priority
is given to the iris. Shutter speed will be slower in low-light scenes according to the
minimum shutter speed set below. The AGC circuit functions automatically in
cooperating with the iris to achieve a consistent exposure output.
From the
Min Shutter Speed
drop-down list, select one of the following shutter speed
options. The default setting is
1/12
(PAL) or
1/15
(NTSC).
Auto Iris
Min Shutter Speed
PAL
NTSC
1/25
1/30
1/12
1/15
Auto Shutter
– This is the default exposure mode of the camera. It is recommended
for the following scenarios: outdoor environments or indoor environments with
unified lighting (either with constant or changeable lighting conditions), as long as the
main light source is a flickering light source, such as fluorescent lighting.
Select this mode so that the camera’s shutter speed works automatically to achieve a
consistent video output level. You can select a suitable minimum shutter speed
according to the environmental luminance.
