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6.3
Controlling Scan Assemblies, CONTINUED
The camera/lens package in the scan assembly provides automatic exposure control.
The lens iris, camera video gain, and camera shutter speed adjust automatically to the
brightness of the scene (unless manual exposure (iris) is selected at the controller). If
the video scene is dark and auto exposure is enabled, the camera automatically goes
into the slow shutter mode which increases the light integration time and the sensitivity.
If the 843216-1011 or 843216-1013 camera is installed and the NightShot mode is
auto, the scan automatically pulls the IR block filter when the camera goes to the
designated video gain and shutter speed. When the IR block filter is removed, the
camera converts to black and white and increases the sensitivity for viewing dark
scenes.
When the scan is set to manual exposure control, iris open on the controller lightens
the scene; iris close on the controller darkens the scene. With the manual exposure
control, the shutter first goes from 1/10000s to 1/60s (1/50s); the iris then goes from
F22 to F1.4 and the gain goes from 0dB to 28dB. Finally, the shutter goes from 1/60s
(1/50s) to 1.0s. If the unit is powered down then back up, the scan comes back up in
the iris mode it was in when it was powered down.
The lens auto focus feature can be set to adjust automatically when the zoom setting
changes or when the pan, tilt, or zoom setting changes. The lens auto focus can also
be disabled so the operator has to manually focus the lens. If the Scan is programmed
for either of the two auto focus settings, the operator can also manually control the lens
focus. The minimum focus distance is set at 1.0 meter (3.3 feet) from the camera lens
in both manual and automatic focus mode.
6.4
FREEZE AND UNFREEZE VIDEO
When the video is frozen, an asterisk displays in the bottom left corner of the display
and the camera remains on the current scene until the operator unfreezes the video.
An operator can manually control the camera or send the camera to a PreShot, but the
video display does not change. When the video is unfrozen, the scene the camera is
viewing is outputted on the video signal.
Function key 8 on a JPD series controller can be set to toggle between freezing and
unfreezing the video signal from the KD6i. Refer to your specific controller manual for
activating function key 8.
6.5
FLASHBACK OPERATION
The flashback function provides the user with the ability to quickly return to a scene of
interest. Function key 4 on a JPD series controller can be set to activate the flashback
feature. Refer to your specific controller manual for activating function key 4.
If a Maxpro series controller is being used to control the KD6i, PreShot (View) 96 is
reserved for invoking the flashback function. Each time the flashback function is
invoked, the scan returns to the scene viewed immediately prior to when the flashback
was invoked previously.
Rev. D
46
KDMU000799
02/6/04
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