Making Test Patterns With "Paint - Clarity SN-4215-P User Manual

7.7 Making Test Patterns With "Paint"

To adjust the display to the computer you need three signals: Black, White, and a special 50% gray
pattern. You can make these with the Windows Paint program.
When you connect a Clarity display to a
computer source, you must make four adjust-
ments in the display electronics:
• Black Level
• White Level
• Frequency
• Phase
It is easy to make these adjustments, but
they must be made with signals coming from
the source computer. Not just any computer,
but the actual computer that will be used as the
content source.
To adjust the Black and White Levels, the
computer must generate a pure black and a pure
white signal. To adjust Frequency and Phase,
the computer must generate a signal in which
alternate pixels are black and white. The screen
will look gray, but it is not the same as making
all pixels gray.
These three signals are easy to make with
the Windows Paint program. This is how to do
it.
1. Open the Windows Paint program. Click
on Start, Programs, Accessories, Paint.
2. Click Image on the menu bar.
3. Highlight Attributes and press Enter.
4. In the Attributes dialog box, select the
"Black and white" button. Click OK.
5. A warning box appears. Click Yes.
6. Click the "fill" tool, which looks like a
paint bucket spilling paint. The cursor
will now be this spilling bucket when it is
over the paint window, the area in the
middle of the screen.
7. At the bottom of the screen, click the
Black square. This is the left square on
the top row of black and white boxes.
8. Click somewhere in the center window. It
will become black.
9. Click File, Save. Name the file
BLACK.BMP.
10. Click the White square at the bottom of
the screen. This is the left square on the
bottom row of black and white boxes.
11. Click somewhere in the middle of the
screen. The screen will become white.
12. Click File, Save As. Name the file
WHITE.BMP.
13. In the bottom row where you picked the
White square, count this White square as
square number 1. Count over to the 9
square and click it.
14. Click somewhere in the center widow. It
will become gray, but this gray will be a
pattern of alternating black and white
pixels.
15. Click File, Save As. Name the file
CHKRBORD.BMP, for Checkerboard.
You can now use these three patterns to adjust
Black and White Level with the black and white
screens, and Frequency and Phase with the
CHKRBORD pattern.
To use these signals, start the Paint program.
Click File, Open, and choose one of the signals.
To make the signal fill the entire monitor, press
Ctrl-F. Return to the Paint screen by pressing
Enter.
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