Dynamic Astigmatism (Spot Shape Adjustment) - Barco Graphics 808s Owner's Manual

Service Mode

Dynamic Astigmatism (spot shape adjustment)

The spot shape adjustments correct the spot shape in 8 different
areas on the screen for all three colors separately.
The spot shape is adjusted according to the axial axises and the
diagonal axises when using the control disc on the RCU.
These adjustments have to be done on a dot pattern (e.g. the internally
generated pattern) with standard line frequency (15 kHz). The
adjustment values are stored in the EEPROM and remain the same for
all frequencies.
Follow the next procedure :
Highlight 'Dyn. Astigmatism' by pushing the control disc up or down
and press ENTER to select.
EXIT returns to the path selection main menu.
Select the source type, selected source or genlock pattern, by
highlighting the color for which the spot shape has to be corrected
and press ENTER.
e.g. when selecting RED under 'on genlocked pattern', the projector
switches to a genlocked pattern.
Press ENTER to continue adjustment.
Increase the contrast level using the Contrast Control to near
maximum. Using that "+" Sharpness Key, defocus the image until the
dots are large and easily visible. Press ENTER to continue to SEL.
SEL : select the adjustment area on the screen where the spot shape
has to be corrected.
Use the control disc to select one of the 8 areas. Press ENTER to
continue to ADJ.
ADJ : adjust the spot shape in the axial or diagonal direction when
using the arrow keys for the selected area. Adjust until the spot
shape is circular.
Use the control disc é or ê for the diagonal astigmatism adjustment
and the control disc è or ç for the axial astigmatism adjustment.
Press ENTER to continue selecting a new area.
The adjustment direction (axial or diagonal) and adjustment value are
given in a text box on the screen. When all areas are adjusted, press
EXIT to return to the service main menu.
7-6
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Spot shapes
before dynamic
astigmatism correction
Diagonal
astigmatism correction
(use the and
arrow key)
Axial
astigmatism correction
(use the and
arrow key)
SERVICE MODE
IDENTIFICATION
COPY A BLOCK
DELTE A BLOCK
DELETE ALL BLOCKS
CHANGE PASSWORD
CHANGE LANGUAGE
RUN TIME
SET TO MIDPOSITION
CONVERGENCE MID
DYNAMIC ASTIGMATISM
MORE...
Select with or
then <ENTER>
DYNAMIC ASTIGMATISM
<EXIT> to return.
ON SELECTED SOURCE
ON GENLOCKED PATTERN
Select pattern or color
DYNAMIC ASTIGMATISM
First adjust the defocusing
SEL : select area using arrow
keys
ADJ : adjust axial astigmatism
using
astigmatism using
Toggle between SEL and ADJ
<ENTER> to continue
5976283 BARCOGRAPHICS 808s 160501
 

 
Spot shapes
after dynamic
astigmatism correction
RED
GREEN
BLUE
RED
GREEN
BLUE
with or
then <ENTER>
<EXIT> to return.
of the image.
or , diagonal
or
with <ENTER>
<EXIT> to return.