Owner`s manual
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explained in depth and the narrative will tell you what to look for in a properly adjusted display.
Once you have made these adjustments, there are several patterns on the AVIA DVD that can be used
in conjunction with the built-in test patterns of the iScan to verify the settings are correct.
Access these as follows:
1. After inserting the AVIA DVD into your DVD player, press the ‘top menu’ button to
bring up the main menu.
2. From the main menu, select ‘Advanced AVIA’.
3. On the right hand side of the ‘Calibrations’ menu page select ‘Video Test Patterns’.
4. From the ‘Video Test Patterns’ menu, select ‘Gray Scale & Levels’.
5. From the ‘Black and White Levels’ menu, select the ‘Needle Pulses’ test pattern.
This is to be used with the ‘Half B/W’ internal test pattern from the iScan.
6. Once you have adjusted brightness and contrast, go back to the ‘Video Test Patterns’
menu and select ‘Color Adjustment’.
7. From the ‘Color Adjustment’ menu, select ‘Special Color Bars’.
Use the ‘Full Bars’ test pattern in conjunction with the ‘H-Clr7 Bars75’ internal test pattern from the
iScan.
Use the ‘Full 100 Bars’ with the ‘H-Clr7 Bars100’ internal test pattern.
Record Your Settings
Once you have set up your iScan, ABT recommends that you record your settings on the installation
worksheet which can be reprinted from the DVDO website at http://www.dvdo.com/faq/faq_pro_
man.php.
Test Pattern Descriptions
Frame & Geometry
This test pattern contains two specic test features. The rst is a 1-pixel wide box around the very
outside of the image. This is used to determine when the entire iScan output image is visible on the
display. The arrows along the middle of each edge provide an indication of the amount of overscan
(if any). The blue boxes in the center of each quadrant are used for measuring display geometry.
The rectangle in the center of the gray boxes should appear square on a 4:3 aspect ratio display,
the next large rectangle should appear square on a 16:9 display, the next on a 1.85:1 display,
and the largest rectangle should be square on a 2.35:1 display. The blue boxes are also used as an
indication that the horizontal positioning of the output image is correct. Due to the iScan VP20’s
4:2:2 internal processing, with a custom output resolution it is possible to cause the Cb & Cr
components to become reversed. If the blue boxes are displayed as red instead of blue, then the
Cb & Cr components are reversed. This can be corrected by ensuring that there is an even number
of pixels in the sum of the horizontal sync and horizontal back porch.
Brightness & Contrast
This test pattern is composed of 4 quarter-screen blocks. Two of the blocks have a background level
of standard black, and the other two blocks have a background level of standard white. Embedded
in the black blocks are 3 bars. One is 4 IRE below black, one is 1 IRE above black, and the third is
2 IRE above black. Embedded in the white blocks are 3 bars. One is 1 IRE above white, one is 1 IRE
below white, and the third is 2 IRE below white. This test pattern is useful for setting display black
and white levels. The bottom 2 blocks differ slightly from these levels. For the bottom 2 blocks,
the blacker-then-black bar is at the lowest possible luma level, and the whiter-than-white bar is at
the highest possible luma level. Also included in the pattern are 2 needle pulses, which can be used
to check CRT voltage regulation as well as the presence of scan velocity modulation.