20
TEST SCREEN
Test Screen
Test Screen
When you activate the Test Screen via the OSD
you can activate a still image to test all settings
and the video performance of your TV. With the
vertical color bars you can test the following:
■
proper color intensity setting on your TV,
■
the proper color of each bar, showing if the
proper video standard is turned on: the colors
should be (left to right): black, white, yellow,
cyan (turquoise), green, magenta (purple), red,
blue, black.
■
proper color transition, seen as sharp
separation of the bars, S-Video will be better
than Video, RGB best of all.
■
the performance of the color filter in your TV
(with ”Video” signals), bar edges should show
no vertical crawling dots. Here S-Video and
RGB formats usually give no problems.
With the grey scale and the black/white fields
below the color bars the brightness and contrast
of your screen can be adjusted optimally, see
chapter ”TV Picture Adjustment” below.
TV Picture Adjustment with
Test Screen
These adjustments may be done now, but you
can also make them after setup has been
finalized.
Brightness adjustment:
1. Turn down the color control on your TV until
the color bars are visible in black and white.
2. Adjust the contrast to the lowest level where
you still can see all bars within the grey scale
in the test picture separately and clearly.
3. Adjust the Brightness so that the bars in the
grey scale are all visible. The bar furtherst to
the left has to be as black as possible rather
than grey but the next aside must clearly be
differable. All the bars in the grey scale have to
be gradually and evenly changing from black
to whiter, going from left to right.
Contrast adjustment:
1. Adjust the contrast on your TV until you see a
bright white bar in the right low corner of the
screen and a deep dark black bar at the left.
The optimal contrast setting will depend from
your preference and the surrounding light in
the TV room.
2. If the brightness of the white bar will no more
increase while turning up the contrast or when
the borders of the white ”harman/kardon” text
letters on top will bloom (overlight) into the
black areas, what drasticly will decrease the
sharpness of the script, then the Contrast has
been turned up too much. Reduce the contrast
until these effects will disappear and the video
still looks realistic.
3. If you are watching TV with a usual surround-
ing daylight, adjust the Contrast so that a nor-
mal video picture has about the same looking
as the surroundings in your room. By that way
the eye is relazed when watching the TV pic-
ture. This contrast setting may be reduced
when the surrounding light is dimmed, usually
improving the sharpness of a video a lot
thereby.
4. The grey scale in the middle line needs to have
the same clear difference between each bar as
before the contrast adjustment. If not, go back
to the brightness adjustment and repeat step 3
and then the contrast adjustments, making
only minor adjustments each time for
optimisation.
Color adjustment.
1. When the Brightness and the Contrast are set
optimally, turn up the color control to the level
of your perference. Adjust to the level where
the colors look strong but still natural, not
overdone. If the color level is too high,
depending from the TV used some of the bars
will seem wider or the color intensity will not
increase while the control is turned up. Then
the color control must be reduced again. At the
end you should test the color intensity also
with a video, e.g. pictures of natural faces,
flowers, fruit and vegetables and other well
known natural articles of our life most usefull
for an optimal setting of the color intensity.
2. If your TV has a Tint option (with most
European TVs this is available or effective only
with NTSC signals, not with PAL), use the large
white bar below the Greyscale to tweak the
warmth of the picture. Every viewer has a
difference in preference as how the glow of
the picture should be. Some prefer a little
colder picture, some a warmer glow. The Tint
function on your TV and the white bar can be
used to control this. Adjust the Tint to the level
where you feel the white color has the tone
you prefer.
Color Bars
Grey Scale
100%
Black/White
fields