5
Installation Manual
Fixed Color Cameras
NIGHT-SAVER
TM
(NITE SVR) MODE
Advanced feature models (ADCA470 series) are designed to provide a useable image even in
extremely low light conditions. To activate Night-Saver
TM
mode, set the
NITE SVR
dip switch on
the back panel to
ON
. The camera will operate in color where the scene illumination is bright and
will automatically switch to monochrome where the scene illumination is low. Typically, the
switchover occurs at approximately 2.0 lux.
To set the camera to operate in color at all times, set the
NITE SVR
dip switch to
OFF
.
DVR-SAVER
TM
(DVR SVR) MODE
Advanced feature models (ADCA470 series) have the DVR-SAVER
TM
mode. Digital video
recorders use video compression (usually based upon the difference in subsequent frames)
and the required storage capacity is therefore dependent upon the difference in scene content.
Features such as AGC and sharpness enhancement etc., can generate signal noise which will
be interpreted as a change in scene content, therefore increasing the amount of space required
to store the video information. The DVR-SAVER
TM
mode feature may be used to reduce storage
requirements when the camera is connected to a digital video recorder. Similarly, the DVR
Saver can also be used to reduce bandwidth requirements when the camera is connected to
a digital network via an encoder. When used with an American Dynamics Intellex DVR, video
file sizes can be decreased by up to 30%*.
When the
DVR-SAVER
TM
dip switch is set to
ON
, the image may appear softer, though the
difference is minimal once compressed in the DVR. There also may be a slight reduction in low
light sensitivity. The default setting is
OFF
.
Results may vary based on lighting and scene content.
BACKLIGHT COMPENSATION (BLC)
The backlight compensation feature can be used to eliminate the effect of an area of strong
background lighting in a scene. If a strong background light such as a window exists in a
scene, the camera will try to compensate for it by reducing the overall exposure. This means
that objects in front of the backlight may appear in silhouette.
BLC will only function with a manual iris lens when the AES facility is switched on. For direct
drive (DC) and video drive lenses, BLC will still function even though the AES facility is switched
off.
The functionality available differs between standard and advanced feature cameras.
Standard Models (ADCA330 Series
)
On standard models, the Backlight Compensation feature compensates for back-lit scenes by
enhancing objects in the centre of the scene which would previously have been in silhouette.
Select
ON
or
OFF
using the
BLC
dip switch. Default is
OFF
.
Advanced Feature Models (ADCA470 Series)
On advanced feature models, it is possible to select areas of the scene which can be used to
control the exposure. To facilitate this, seven pre-defined windows are provided. Use the three
BLC
dip switches to select one of the pre-defined windows, as shown in the diagram overleaf.
