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(4) Vertical Sawtooth / ` • .
Adjusting vertical sawtooth decreases the defference in intensity between
the top and bottom of the image. Turning the adjusting screw CW results
in the top of the image becoming brighter. Turning the adjusting screw
C C W results in the bottom of the image becoming brighter.
8-5 VIDEO SELECT
W h e n the M2503 VIDEO BOOSTER or the R2504 VIDEO INVERTER i s installed, this
switch allows for the selection of the desired video display mode.
The three positions of the VIDEO SELECT switch are NEUTRAL, BOOST , and NEGA.
(1) Neutral
In this position(middle), a normal, positive video signal i s output/
displayed.
(2) BOOST
In this position(upper), the output characteristics of the camera are
modified to enhance the visualization of detail i n dark portions of the
image. T h e conversion characteristic(i) i s preset to 0.5 although this
value i s continuously adjustable from 0.3 to 1.0(See Section 10-2 for 7
characteristic adjustment).
The basic principle of the conversion i s as follows.
OUTPUT INTENSITY
Example
Y-40.5 (Boost Image)
7
=
1
INPUT INTENSITY
Normal Image
B
o
(Normal Image)
o
s
t
Image
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