Ask Proxima 9100 manual Adjusting Contrast and Brightness, Adjusting Sync, Adjusting the Dot Clock

3After you have determined your video specifications, find the closest computer parameter entry in the compatibility list. Next, open the DP9100’s Source Mode menu and scroll up or down through selections to find the closest source mode. Use the right arrow key to load the mode of choice.

Further parameter adjustments may be required to correct image problems for the “best” input source selection. A basic explanation of the adjustment functions follows.

Note: Parameter modifications are saved each time you close the menus or turn off the power.

Adjusting Contrast and Brightness

Adjust the Contrast so that the colors (particularly the gray shades) are right for the projected image. Buttons should look three-dimensional, as they do on your monitor. Adjust the Brightness to make the image clear.

Adjusting Sync

Adjust the Sync control to shift the dot clock’s phase to match the phase of incoming video signal. An incorrect Sync setting causes “sparkles” and horizontal streaks randomly across the screen.

Adjusting the Dot Clock

The Dot Clock control adjusts the projector’s dot clock frequency to match the incoming video signal’s frequency. An incorrect dot clock adjustment causes faint, uniformly spaced vertical lines of video distortion/shading.

Adjust the Dot Clock control slowly in the direction that causes the lines/bands of shading to get wider and fewer in number. There will be no bands of distortion/shading when correctly adjusted.

Adjusting the Horizontal Position

The Hor. Pos (Horizontal Position) control adjusts the amount of blanking before each horizontal line. Incorrect horizontal position adjustment can cause either side of the projected image to extend beyond the viewing area, end of line wrap around, or a half-normal display size.

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