User`s manual

3.14
Controlling Camera Black Level
BLACK LEVEL
The black level control functions much like the brightness control on a television
set. The fixed video black level is set at the factory so that the output video is
just above the black clipping level with the lens capped. The black level can be
varied over a range of plus or minus 50 percent of peak white video.
Type In: Response Explanation
BKF CR-LF Sets the black level to an internal fixed value of
approximately 10 counts above zero.
BKE xxxx CR-LF The black level range, xxxx, is from -2730 to 1365.
BKE? Queries current black level setting.
BKF Means the black level is at the factory preset level.
BKE xxxx Means black level externally set to the value indi-
cated.
NOTE
The video will be clipped to 0 counts until it overcomes a negative offset. The
video will be offset towards white by a positive offset.
BLACK LEVEL BALANCE
The black level of the two output video channels are matched at the factory to
minimize row to row shading. The black level balance command adjusts the
black level of one channel with respect to the other. The adjustment range is
from -128 to 127. With the camera in dual channel readout operation and the
lens capped observe the video monitor and change the black level balance until
you are satisfied with the pictures that you see.
Type In: Response Explanation
BKB xxxx CR-LF Sets the black level of one channel with respect to
the other where xxxx ranges between -128 and 127.
BKB? Queries the current black level balance setting.
BKB xxxx Means the black level is set to xxxx
Sample commands with arguments:
BKB 0 Sets the camera black level balance to a value of 0.
BKB -100 Sets the camera black level balance to a value of -100.
BKB 30 Sets the camera black level balance to a value of 30.