Pre l iminar y – Vidikron 140/150 User Manual
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Vision Model 140/150 Owner’s Operating Manual
PRE
L
IMINAR
Y
blacks and whites without crushing.
Figure 3-21. Adjusting Black Levels and White Levels Using the Clipping Detector
1.
Display a 16-level grayscale test pattern from the VHD Controller.
2.
Enter a checkmark in the Clipping Detector checkbox.
3.
Display one primary color.
4.
For the current color, adjust its corresponding “Black Level” slidebar just until a single
band of black appears at one edge of the screen. This band represents the first band of
the grayscale pattern, which should be 100% black. Do not adjust too far.
5.
With the same color still active, adjust its corresponding “White Level” slidebar just until
a single band of color appears at the opposite edge of the screen. This band represents
the last band of the grayscale pattern, which should be 100% white (or the current color,
if a certain color is enabled). Do not adjust too far.
6.
It may be advantageous to go back and check the black band. Adjust the blacklevel
slidebar if necessary.
7.
Repeat Steps 4 through 6 with the other two remaining primary colors. When each
primary color shows one optimized black band and white (or colored) band, the input
levels for this source are correctly set. Upon exiting the White Balance menu, the
Clipping Detector checkbox will clear.
• Color Enable: Select which color or colors you want to see in the display. This is useful
when working with color temperature white levels or black levels.
When you have finished optimizing the picture quality, lock the channel that you unlocked
The Clipping Detector will initially render the grayscale as a uniform gray
field before adjustment or extreme crushing.
Selecting Auto Color Enable ensures that the correct color is displayed for
each setting.
Readjusting the black levels affects the gain at this point; only readjust
when absolutely necessary.
4. Adjust corresponding
black level (red, green or
or blue) until one black
band appears.
5. Adjust corresponding
white level (red, green or
or blue) until one bright
band appears.
3. Choose one primary
color at a time.
1. Pre
Calibration
2. Red
Black
Level
256
3. Red
White
Level
256
4. Green
Black
Level
256
5. Green
White
Level
256
6. Blue
Black
Level
256
7. Blue
White
Level
256
8.
Auto Color Enable
9.
Clamping Back
Porch
0.
Clipping Detector
Color Enable Red
White Balance
Note
Tip
Note