Vidikron 140/150 manual Adjust Pixel Tracking before Pixel Phase, Picture Quality Menu

Installation

Pixel Phase: Adjust pixel phase when the image (usually from an RGB source) still shows shimmer or “noise” after pixel tracking is optimized. Pixel phase adjusts the phase of the pixel sampling clock relative to the incoming signal.

Adjust “Pixel Tracking” before “Pixel Phase.”

Note

For best results, use a good test pattern such as a smooth gray consisting of a clear pattern of black and white pixels, or a similar “half on, half off” graphic image. Adjust the slidebar until the image stabilizes and each pixel is clearly defined. You may notice that you can stabilize the image at more than one point; for example, you may find that the image appearance at “11” is identical to the image appearance at “38.” Use either setting in such cases. If some shimmer from a video or HDTV source persists, use the “Filter” control in the Image Settings menu (described later) to remove high-frequency noise from the signal.

Horizontal Shift: This option moves the image right or left within the area of available pixels.

Vertical Shift: This option moves the image up or down within the area of available pixels.

The values shown represent where the approximate center of the image

Note lies in relation to the total number of pixels available horizontally or vertically. This varies widely according to the signal; watch the image while adjusting.

Use options in the Picture Quality menu to alter your image without affecting its size or position. Changes made in this menu are applied immediately and saved when you exit the menu. Options not available for the projector model or source are disabled and appear dim (gray).

White Level (Contrast): “White Level” increases or decreases the perceived difference between light and dark areas of your image (0-100). For best results, keep it under 50. If the White Level is too high, the light parts of the image lose detail and clarity. If it is too low, the light areas will not be as bright as they could be and the overall image will be dim. For best results, start with a low value and increase so that whites remain bright but are not distorted or tinted and that light areas do not become white (“crushed”).

If the environment lighting changes, an adjustment of Gamma is

Note recommended (see below).

Black Level (Brightness): “Black Level” increases or decreases the amount of black in the image (0-100). For best results, keep close to 50. Start with a high value and decrease so that dark areas do not become black (“crushed”). Conversely, high brightness changes black to dark gray, causing washed-out images.

Gamma: “Gamma” is a global setting that determines how gray shades are displayed between minimum input (black) and maximum input (white) for all signals. The normal gamma setting of 2.2 is correct for virtually all signals and conditions. If excess ambient light washes out the image and it becomes difficult or impossible to see details in dark areas, lower the gamma setting to compensate.

Picture Quality Menu

Picture Quality

1.	White Level	50.0
2.	Black Level	50.0
3.	Gamma	2.2
4.	Filter	Off
5.	Sharpness	0
6.	Noise Reduction	0
7.	Color Space	RGB

8.Decoder Adjust

9.White Balance

0.Advanced

Vision Model 140/150 Owner’s Operating Manual 53