Planar GX40 User Manual page 33

✎
Black Level must be done before White Level. The
black and white pictures must come from the real
source. It doesn't help to do this with a laptop,
then plug in the "real" computer for the program.
That completes the levels adjustments. If you have more
than one computer or other analog RGB source, as might
come from a switcher, you should do this for each source
and save the configuration to a memory slot.
Manual level adjustment
1. Display an all-black picture from the source computer.
✎
You cannot make these adjustments using the
internal Test Patterns. The black/white picture
must come from the computer that will be used for
the program material. Adjusting levels with your
laptop, then connecting to the "real" computer will
not do a proper job.
2. On the remote press
LEVEL
3. In the Input Levels menu, select Black Level and
adjust it up and down with the + \ – keys to make the
three C P values go to zero. If they do not
ENTER OINT
all touch zero at the same time, use the individual col-
ors under B L
LACK EVEL
✎
Do not go beyond the point where the Minimum
just goes to zero. The idea is to just touch the zero
level.
4. Display an all-white picture from the source computer.
Next, adjust White Level (gain) until the Image Maxi-
mums just go to 255. Again, do not push it up after the
maximum is 255. Just touch the 255 point. You must adjust
Brightness first, Contrast second.
If the three colors are not all at 255 (or 254), adjust them
separately.
Full automatic level adjustment
Automatic adjustment of black and white levels does not
do as good a job as manual adjustment of levels. By select-
ing Do Black/White Levels box in the Auto Setup Options
menu (Main Menu > Advanced Options > Auto Setup
Options), the GX40 adjusts White levels and Black levels
.
to adjust them.
to the brightest and darkest pixel, respectively, in the pic-
ture.
A dv an ce d O p t io n s
C ol o r B ala n ce
M i sc ell an eo u s O p ti on s
B ack l i gh t S e t ti ng s
S e r i a l P or t S e t t i n g s
A ut o S e t up O p t i o n s
M e n u O p t i o n s
Me ss ag e in Pi ct u re
Au t o S e tu p O p t io n s
Re tr y o n L o st S ig na l
Do B la ck /Wh it e L eve ls
Do F r e q ue n cy
Do P ha se
Do P os it io n
This does not work well because:
• some pictures do not contain a pure white pixel;
• some white pixels contain "spikes," which makes them
seem brighter than they really are, resulting in incorrect
settings.
For these reasons, we recommend you leave Do Black/
White Levels unchecked.
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