Barco VISION 701 MULTIMEDIA Owner's Manual page 149

APPENDIX D : CONTRAST MODULATION
The first 3 adjustments (horizontal
red, green and blue) are used for
horizontal light equalisation for the
three specific colors separately.
This compensates the error due to
the different horizontal position of
the picture tubes. One side of the
image is reddish and the other side
is blueish. This phenomenon is
called Color shift.
The VERTICAL adjustment affects
the three colors at the same time
and corrects the vertical error in
light output due to the projection
angle (10.5 degrees).
Left-right (horizontally) and top-
bottom (vertically) adjustments
improve the 'hot spot' in the center
of the screen.
Contrast equalisation ('Color Shift')
Highlight RED HORIZONTAL with
the control disk and press ENTER .
Only a red image is displayed. Use
the control disk to equalise the light
output on the left and right side of
the image. The best result is ob-
tained on a white image by looking
on the left and the right side until
both or equal, or by using a very
sensitive light meter.
ENTER returns to the Contrast
Modulation menu.
Repeat this adjustment for green
and blue by selecting first Green
horizontal and then Blue horizon-
tal.
Remark : When the end of adjust-
ment range is reached for red and
blue, the green image will be dis-
played too, to give you the mes-
sage 'end of adjustment range'.
The green image remains active
until a new selection is made.
R5975238A BARCOVISION 701 MULTIMEDIA 200697
CONTRAST
EQUALISATION
RED HORIZONTAL
GREEN HORIZONTAL
BLUE HORIZONTAL
VERTICAL
CONTRAST
EDGE CORRECTION
LEFT-RIGHT
TOP-BOTTOM
Select with
then <ENTER>
<EXIT> to return
CONTRAST
EQUALISATION
RED HORIZONTAL
GREEN HORIZONTAL
BLUE HORIZONTAL
VERTICAL
CONTRAST
EDGE CORRECTION
LEFT-RIGHT
TOP-BOTTOM
Select with
then <ENTER>
<EXIT> to return
ENTER displays the red image.
EXIT returns to the Random Access Ad-
justment Mode main menu
ADJUST returns to the Operational mode.
or
338
or
338a
D-3