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Vidikron Vision Model 30 Owner’s Operating Manual
On-Screen Display Menus
Image Over Scan pushes the outside edge of the active picture area of the video signal
out beyond the edge of the display area.
Some television programs are produced based on the assumption that older television
sets may not display the outer edges of the broadcast picture area. Over scan effectively
trims away these inactive, outer edges and enlarges the remaining portion of the image
to fill the display area.
Use the on-screen slidebar to set the desired amount of over scan.
For HDTV, DVDs and other video sources, Over Scan is generally not necessary or
desirable.
This control compensates for incoming elevated black levels present in certain video
signals, and ensures that blacks in the display are neither “crushed” (where dark grays
appear black) nor excessively elevated (where blacks appear dark gray). By default, the
projector automatically determines the best setting according to the type of incoming
video signal:
• 0 IRE – Used for DVD output with “enhanced black,” SECAM, most PAL standards and
Japanese NTSC.
• 7.5 IRE – Used for most NTSC video signals.
For some types of video, you may want to override the setting. Generally, if black appears
crushed when brightness = 30, choose “0 IRE”. If black appears excessively elevated, use
“7.5 IRE”.
The Image Shift menu allows you to precisely center the image on the screen. (These
controls are available only with a 480i source signal.)
Horizontal: This control moves the image right or left within the area of available pixels.
Vertical: This option moves the image up or down within the area of available pixels.
NOTES:
1. To adjust the image position with a 480p or higher-resolution source, use the HD/RGB Adjust
controls in the Image Option menu, described on page 36.
2. The values shown represent where the approximate center of the image 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.
This menu item is reserved for future use.
The Amplitude menu allows you to fine-tune the image aspect ratio by stretching it
horizontally or vertically, in small increments. The Horizontal control adjusts the image
width while keeping the height constant. Similarly, the Vertical control adjusts the image
height while keeping the width constant.
Select Fan Control from the Service Menu to control the operation of the projector’s
cooling fan.
Mode: In most cases, the default Fan Control Mode (Auto Normal) will maintain the correct
operating temperature. If the lamp frequently turns off due to overheating, or in certain
high-altitude operating environments, you may need to change this setting to Auto Hi.
Altitude or Manual.
Image Over Scan
Video Black Level
Image Shift
Amplitude
Fan Control
Horizontal Masking