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Harman Kardon AVR254 Manual

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blocks, change the MPEG Noise Reduction setting from its default of
Off to the Low, Medium or High setting to improve the picture.
Cross Color Suppressor: Turn this setting on to remove cross color
artifacts, which can occur when high-frequency luminance (brightness)
signals are misinterpreted as chroma (color) signals, which can cause
unwanted flickering, flashing colors or rainbow patterns.
Film Mode Detect: While normally left off, turn this setting on to com-
pensate for authoring errors in the process of converting film programs
to video.
How to Adjust the Custom Picture Settings
Set the Video Mode to Custom to display the picture settings as shown
in Figure 68.
Figure 68 – Video Modes Custom Processing
With a color bar test pattern screen from a test disc or other source
showing on your video display, the following adjustments may be made:
• The proper color intensity setting on your TV.
• Proper color adjustments using the color bars, which should be (left
to right) black, white, yellow, cyan (turquoise), green, magenta, red,
blue, black.
• The proper color transition, seen as sharp separation of the bars.
• The performance of the color circuits in your TV (with “Video” signals);
bar edges should show no vertical crawling dots.
With the gray scale and the black/white fields below the color bars, the
brightness and contrast of your screen can be adjusted.
Brightness Adjustment
1. Turn down the color control on your TV until the color bars appear
in black and white.
2. Adjust the contrast to the lowest level where you still can see all gray
scale bars separately and clearly.
3. Adjust the brightness so that the bars in the gray scale are all visible.
The bar farthest to the left has to be as black as possible rather than
gray but the next gradation must clearly be distinct from it. All the
bars in the gray scale should be gradually and evenly changing from
black to white, left to right.
Contrast Adjustment
1. Adjust the contrast on your TV until you see a bright white bar in the
lower right corner of the screen and a deep-dark-black bar to the
left. The optimal contrast setting will depend on your preference and
the surrounding light in the TV room.
2. If the brightness of the white bar no longer increases when the con-
trast is turned up or the borders of white letters bloom (overlight) into
the black areas (drastically decreasing the sharpness of the type), the
contrast has been turned up too much. Reduce the contrast until
these effects disappear and the video still looks realistic.
3. If you are watching TV with ambient daylight, adjust the contrast so
that a normal video picture has about the same look as the surround-
ings in your room. That way the eye is relaxed when watching the TV
picture. This contrast setting may be reduced when the surrounding
light is dimmed, thereby usually improving the sharpness of a video
significantly.
4. The gray 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 “Brightness Adjustment” and repeat Step 3 and then
“Contrast Adjustment,” making only minor adjustments each time for
optimization.
Color Adjustment
1. When the brightness and contrast are set optimally, adjust the color
control to the level of your preference. Set the level so that the colors
look strong but still natural, not overdone. If the color level is too
high, depending on the TV, some of the bars will seem wider or the
color intensity will not increase when the control is turned up. Then
the color control must be reduced again. Ultimately, you also should
test the color intensity with a video – e.g., pictures of natural faces,
flowers, fruit and vegetables, and other common natural articles for
an optimal setting of the color intensity.
2. Refer to the large white bar below the gray scale to tweak the
warmth of the picture. Every viewer has a preference as to how the
glow of the picture should be. Some prefer a 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.
Sharpness Adjustment
Contrary to intuition, the picture will appear sharper and clearer with the
sharpness backed off from the maximum setting. Reduce the sharpness
setting on your television, and the setting on the AVR 254 if necessary,
to minimize the appearance of any white lines between the bars in the
gray scale portion of the test screen.
Convergence and Edge Focus
The crosshatch pattern that surrounds the test screen may be used to
evaluate edge focus and convergence in front- or rear-projection video
displays. However, the controls used to adjust these parameters are
often not user-accessible. In any event, these adjustments are extremely
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ADVANCED FUNCTIONS
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