InFocus TD61, Руководство пользователя

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3.2 Adjusting TD61 To Its Source
The source picture—from computer, video, DVD—is variable and does not always conform exactly to a
standard.
TD61
has a way to compensate for this.
Connections
The TD61 has 3 computer sources: analog 1, ana-
log 2 and digital. Analog 2 and digital sources share a
connector. This is an M1 connector. Because they
share a connector, they also share a chip for EDID
(Extended Display Identification Data). EDID is what
tells a computer the type of monitor it is attached to.
It is the mechanism that allows Plug and Play moni-
tors to work.
Most of the time, Plug and Play will work just fine
but every once in a while, EDID can get in the way of
smooth operation. TD61 has 2 user controls that
deal with EDID. Plug and Play Enable turns on EDID
for both analog 1 and analog 2/digital. Unchecking
this box causes the host computer to ignore it. The
other user control allows the user to choose whether
the EDID information on the M1 connector is for an
analog monitor or a digital monitor. Most digital
graphics cards will not output anything if they think
they are connected to an analog monitor. The choice
defaults to digital but should be set by the user to
match which input they are using on that connector.
Input levels
Computer signals vary quite a bit from computer to
computer. They even vary between video outputs on
the same video card. Video sources vary more.
To make the TD61 respond correctly to these non-
standard sources we adjust Input Levels.
• Input Levels for computer sources, analog,
page 30
• Input Levels for video sources, page 32
How does Input Level relate to Color Balance
If you have more than one TD61 in the area and
you want them to display identical colors, you need
to adjust input levels
and do color balancing.
You can do Input Levels first, or you can do Color
Balance first. It doesn’t matter. But they must both be
done.
Input Levels and Color Balance do not affect each
other, but they both affect the final picture.
• Color Balancing the displays, page 36
What does Input Level do?
For analog computer sources adjusting to the com-
puter’s picture output means finding what that com-
puter means by black and white.
Black is supposed to be a voltage a zero coming
from the computer’s video card, but it almost never
is. White is supposed to be a voltage of 0.7 volts, but
it usually isn’t either.
The Input Level adjustment process asks you to
provide a picture from the computer that is black,
then one that is pure white. With these, you can
quickly and automatically make the display “learn”
what
this computer means by black and white.
The result? Good pictures, using all the dynamic
range of color coming from the computer.
For Input Levels, you must use black and white coming
from the computer you will use for the program. You
don’t make this adjustment with your work laptop and
then switch to another computer for the display’s
program of pictures.
What does Color Balance do?
Color balancing matches the colors between sev-
eral TD61’s.
Displays differ from one another because of very
small differences in the color of the light produced by
the lamp and by differences in the dyes used to make
the color in a DLP™ optical engine.
In color balancing you use the display’s internal
test patterns of white, then gray. The internal pattern
assures that a pure white is used.
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