Runco Video Xtreme VX-4c Owner's Operating Manual page 103

GLOSSARY
Menu
NTSC Video
Optical Screen
PAL Video
Pincushion
Pixel (picture element)
Pixel Phase
Pixel Tracking
Projector-to-Screen Distance
Protocol
Pull-down List
Rear Screen
Resizing
Resolution (lens)
Resolution (projector)
Retrace Time
Rise Time
A list of selectable options displayed on the screen.
A video output format of some video tape and disk players. There are two types of
NTSC (National Television Standards Committee) video: NTSC 3.58 and NTSC
4.43. NTSC 3.58 is used primarily in North America and Japan. NTSC 4.43 is less
commonly used.
A type of rear-projection screen which re-directs light through the screen to
increase image brightness in front of the screen. Screen gain is usually greater than
1 but audience viewing angles are reduced.
PAL (Phase Alternating Line) video is a 50 Hz standard with 768 x 576 resolution.
It is found on some video tape and disk players (used primarily in Europe, China
and some South American and African countries).
A distortion of the image shape characterized by concave or convex borders.
The smallest discernible element of data from a computer-generated image.
The phase of the pixel sampling clock relative to incoming data.
The frequency of the pixel sampling clock, indicated by the number of pixels per
line.
The distance between the projector's front feet centers and the screen. Also called
"Throw Distance".
The type of code format called "A" or "B" utilized by the remote keypad(s). The
default protocol set at manufacture is Protocol "A". By using two different keypad
protocols, adjacent projectors can be controlled independently with their remote
IR keypads.
A selectable menu item that unfolds into a list of options pertaining to it.
A translucent panel for screen projection. Incident light travels through the inci-
dent surface of a rear screen and forms an image on the other surface.
The ability to manipulate through software commands the physical size, placement
and/or aspect ratio of an image.
The maximum number of alternate white and black horizontal lines that can be dis-
tinguished on a screen when a photographic target is placed between the lens and
a light source and illuminated by that source.
The maximum number of pixels that the projector can display horizontally and
vertically across an image, such as 1280 x 1024.
(Horizontal) The minimum time required for a CRT projector to move the position
of the scanning spot from the right edge to the left edge.
The time required by the video amplifier of the projector to increase its output
from 10% to 90% of the maximum value.
A-4