DVDO AVLab TPG, Руководство пользователя

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DVDO AVLab TPG - 4K Test Pattern Generator
DVDO AVLab TPG 23 A.04
As you can see in image C, the test pattern is almost displayed correctly. You can see the 1-pixel wide
white border on the top, bottom and left side of the image but not on the right side of the image. By
adjusting the horizontal size of this signal to 1360 (rather than 1366), we can get this test pattern
displayed correctly on our display.
Vertical lines, Horizontal lines, and every other pixel:
There are three test patterns that are used to verify that the chosen output resolution is the native
resolution of your display and that you are bypassing any internal processing in your display.
When the every other pixel test pattern is displayed correctly, close up you should be able to see a 1-
pixel checkerboard and at proper viewing distance the image should appear as an even gray. If your
display is CRT-based you will not see this checkerboard, but your screen should be an even gray.
When this test pattern is displayed incorrectly, the resulting image does not look like a fine checkerboard
and may have irregular patterns. If this is the case then the chosen output resolution may not
be the native resolution of your display or your display may scale all input signals even if the input
resolution is already at native resolution. Check to make sure that the output resolution selected on the
AVLab TPG is the correct output resolution for your display.
Note: If this test pattern does not appear as it should and you have chosen the native resolution of your
display, you may not be able to bypass the internal processing on your display.
The ‘Vertical Lines’ test pattern should appear as one pixel wide black and white columns. If you see any
irregular pattern(s) in the image then you know that the display is scaling the signal horizontally.
If using a projector, the vertical lines will show distortion if any keystone is used. Keystone should be
avoided at all costs – instead, hang the projector in the correct position.