Owner`s manual

Access these test patterns as follows:

1. Insert the VRS DVD into your DVD player

2. From the main menu, select ‘Picture Controls’.

3. Next select ‘Half Patterns’.

4. Select the matching test pattern on the iScan VP50 and the VRS DVD and adjust

accordingly.

Record Your Settings

Once you have set up your iScan VP50, ABT recommends that you record your settings on the instal-

lation 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 specic 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 VP50’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.

1-Pixel Checkerboard

This test pattern consists of a 1-pixel black and white checkerboard. The test pattern alternates black

and white pixels in both the vertical and the horizontal direction. This pattern is useful for exactly

matching the iScan’s output resolution to that of the display to achieve 1:1 pixel mapping and bypass

any scaling operation which may be incorporated in the display.

1-Pixel Vertical Lines

This test pattern consists of an alternating series of 1-pixel black and white vertical lines. The test

pattern alternates black and white pixels in only the horizontal direction. This pattern is useful for

exactly matching the iScan’s output resolution to that of the display in order to achieve 1:1 pixel

mapping and bypass any scaling operation which may be incorporated in the display. Its use is similar

to that of the 1-pixel checkerboard, but it operates only in the horizontal direction.