Extron electronics RGB 112xi Operations Instructions download pdf (Page 44)

3-19Integration Scaling Matrix Switcher • Operation

1. If you are using a digital display such as an LCD or DLP projector, use the

alternating pixels test pattern as a reference to adjust the phase and dot clock

on the display devices. Proceed to step 2.

If you are using a CRT display, use the cross hatch test pattern as a reference

to converge the display.

2. Set the ISM to output either the crop test pattern for 4:3 video or the

appropriate aspect ratio test pattern.

3. Use the display’s positioning controls to position the image so that you can

see all sides of the test pattern on the display.

For the best results of this optimizing procedure, do not use the ISM’s

centering controls to position the image.

4. Select an input. Use the ISM’s size and center functions to fill the crop or

aspect ratio test pattern.

If the input source is a DVD, set the DVD player to output a 16:9 aspect ratio

(see “Setting up a DVD source” below) before sizing the image using the

ISM’s size function to correct the aspect ratio.

When you are sizing and centering a letterbox movie video source, increasing

the brightness on the ISM makes it easier to see the top and bottom of the

active video.

5. If the input source is RGB, use the horizontal and vertical detail adjustments

to increase the sharpness.

6. For S-video and composite video inputs, set the ISM to output blue-only

video and to output the Color Bars test pattern. Using the blue Color Bars as

a reference, use the ISM’s color and tint controls to adjust the video’s color

and tint.

7. For RGB video inputs, set brightness and contrast levels. See “Picture

adjustments”, earlier in this chapter.

8. Save this setting into one of the user memories using the User Presets menu.

See “User Presets menu”, earlier in this chapter.

Setting up a DVD source

To get the best results when using a DVD as a video source, Extron recommends

that the DVD player itself be set up to output an aspect ratio of 16:9 and not 4:3.

Because all DVDs are mastered as 16:9, having them set up for anything else causes

the player to internally scale and compress the signal. The DVD player’s scaling

and compression defeats the advantage of having 3-2 pulldown detection in the

ISM.

All sizing adjustments to correct the aspect ratio should be done using the ISM.

To change the output aspect ratio of most DVD players:

1. Enter the DVD player’s setup or action menu while the disc is stopped.

2. Select the 16:9 aspect ratio.

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Extron electronics RGB 112xi Operations Instructions Page 44