InFocus TD61, User Manual

Page: 32 / 102

3.2 Adjusting TD61 To Its Source
30
3.2.1 Adjusting to Computer Sources
Digital sources do not normally need adjustment. The best way to adjust levels is the semi-automatic
method.
Adjusting levels semi-automatically
This is quick and easy if you can get a black pic-
ture and a white picture from the source computer.
1. Display a black picture from the source. This
must come from the computer source that will be
used for the program.
It does no good to use your
laptop for this adjustment, then connect to a dif-
ferent computer for the program. Nor can you use
the TD61 black test pattern. (Hint: Make a black
screen from Windows Paint program.)
2. In the
INPUT LEVELS
menu, select
AUTO BLACK LEVEL
and press
ENTER
.
3. Display a white picture from the source.
4. Select
AUTO WHITE LEVEL
and press
ENTER
.
That’s all there is to it. The TD61 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.
Adjusting levels manually
1. Display an all-black picture from the source com-
puter.
2. Press
PICTURE
on the remote to open the
PICTURE
menu.
3. Select
LEVEL
at the bottom of the menu.
4. Select
BLACK LEVEL
and adjust it up and down with
the +/– keys to make the three
CENTER POINT
values
go to zero. If they do not all touch zero at the
same time, use the individual colors under
BLACK
LEVEL
to adjust them.
. Do not go beyond the point where the Minimum just
goes to zero. The idea is to just touch the zero level.
5. Display an all-white picture from the source com-
puter.
6. Select
WHITE LEVEL
and adjust the levels until the
CENTER POINT
values just touch 255, adjusting the
individual colors as necessary.
It is not a good idea to use the levels to make the
displays match each other. That should be done with
the
COLOR BALANCE
menu. (3.4 “Color Balancing TD61”
on page 36).
Adjusting levels completely automatically
Open the
AUTO SETUP OPTIONS
menu and check D
O
BLACK
/
WHITE LEVELS
.
You can check the other items, too,
particularly
FREQUENCY
and
PHASE
.
Now press
SETUP
.
TD61 looks for the darkest pixel
and the brightest pixel in the picture and adjusts
itself so that these are the truly the darkest and
brightest.
When the
BLACK
/
WHITE LEVELS
item is checked, the
TD61 will do this automatic level adjustment when-
ever a
completely new source is displayed.
What is a “completely” new source?
TD61 remembers all the values in the last 10 pic-
tures. If a new picture comes from a different source,
such as from a different computer, and that picture
has almost exactly the same resolution, number of
active lines, number of blanking lines, etc., the TD61
will assume that this is a source it has seen before
and use the remembered setup values. This is a dif-
ferent sort of memory from the 40 numbered memo-
ries described in 3.6 “Saving Your Work and Recalling
a Memory” on page 40.
On the other hand, if the new source is sufficiently
different, TD61 will engage all the checked processes
in the
A
UTO
S
ETUP
O
PTIONS
menu.
When a saved memory is recalled from the
R
ECALL
menu, TD61 does not do any auto setup.
Which is best: Manual, Semi-Auto, or Auto
The manual and semi-automatic methods are
more accurate. The automatic method works well for
the
BLACK LEVEL
,
but it is sometimes not accurate
enough for the
WHITE LEVEL
.
The good news is that you should only have to do
the manual or semi-auto method once for each com-
puter source. Save these settings in the
SAVE
menu,
See “Memory: Save” on page 67 Then use
RECALL
to
instantly bring it all back.
When to re-adjust levels
You should re-adjust black and white levels when-
ever:
• the computer is changed.
• the video card in the computer is changed, or you
switch the source for this display to a different
video card output in the same computer.
• you change the electronics module.
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