Owner`s manual

35
When this test pattern is displayed correctly, it should look like this, with a one-pixel wide white
border around the edge of the screen:
Frame/Geometry Test Pattern
In some cases the test pattern will not be positioned or sized correctly and the user will need to make
the proper adjustments. To change the horizontal size of the image, for example, you must rst put
the iScan in ‘Advanced’ user mode.
Conguration
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User Mode
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Advanced
Output Setup
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Format
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1366x768 (2)
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H-Size
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1360
In some cases, the output format is correct, but the image just needs to be shifted to ll the screen
correctly. Do this by using the Horizontal and Vertical Shift options in the ‘Output Setup’ menu.
Output Setup
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Format
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1366x768 (2)
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H-Shift
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Range
Output Setup
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Format
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1366x768 (2)
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V-Shift
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Range
NOTE: Any adjustments made to the output format change your selected output from the resolution
you selected to ‘User’. This allows you to adjust the output without affecting the default settings. There
are three test patterns 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. They are the checkerboard,
vertical lines and horizontal lines test patterns. When the checkerboard test pattern is displayed cor-
rectly, 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 ne checkerboard and may have irregular patterns. When this is the case,
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. One reason they may
happen is that the display may be on the wrong Aspect setting. For example some manufacturers have
a “native mode” or “dot-by-dot” mode which turns off al internal processing. Check to make sure that
the output resolution selected on the iScan 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, you know that the display is scaling the signal horizontally. To
override the internal scaling, adjust the horizontal size of the image to see if the test pattern can be
displayed correctly.
Output Setup
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Format
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User
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H-Size
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Adjust