Adjusting Levels For Analog Sources - Planar GX40 User Manual

3.2.2 Adjusting Levels for Analog Sources

This section applies to Analog RGB (computer) pictures only. The Levels are best adjusted semi-automatically.
Why adjust levels?
For analog RGB pictures the levels for black and white
vary from one computer to another, or from one video pro-
cessor to another. They even vary between video outputs
from a multiple-output video card in a computer.
Your pictures will not look their best on GX40 until you
adjust for these differences. This is not about adjusting
color or contrast. It's about telling the GX40 what the com-
puter or processor means by black and by white.
Semi-automatic level adjustment
1. From the computer source, display an all-black picture.
This must come from the computer source that will be
used for the program. It does no good to use your lap-
top for this adjustment, then connect to a different com-
puter for the program. Nor can you use the GX40's
black test pattern. (Hint: Display a black screen using
Windows Paint program.)
✎
To adjust levels for UXGA sources that will be
displayed in One to One scale mode, perform your
adjustments using Fill All scale mode and then
switch back to One to One.
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2. To access the Input Levels menu, on the Remote press
:
LEVEL
In p ut L e vel s
Au t o Bl ac k L e ve l ( o ff s et )
Au t o Wh it e Le ve l ( g ai n)
Ce nte r Po in t
Bl ack L eve l ( o ff se t )- Al l
Re d
G r e e n
Bl ue
Wh ite Le ve l (g ai n) -A ll
Re d
G r e e n
Bl ue
3. In the Input Levels menu, select Auto Black Level and
press . This menu line says "Working..." until
ENTER
the process is complete.
4. From the computer source, display an all-white picture.
5. In the Input Levels menu select Auto White Level and
press . Wait for "Working..." to disappear.
ENTER
The GX40 is now adjusted to the black and white levels
of this computer using this video card. If you change
computers or video output cards in the computer, you
must do this again.
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