Christie Digital Systems CX50 Checkbox, Color Shift, Color Temperature, Component Video, Decoder

Appendix A: Glossary

Checkbox	' A menu item that indicates whether an option is currently in effect (checked) or not
	(unchecked).
Color Shift	' A change in the tint of a white field across an image.
Color Temperature	' The coloration (reddish, white, bluish, greenish, etc.) of white in an image, measured
	using the Kelvin (degrees K) temperature scale. Higher temperatures output more
	light.
Component Video	' See YCbCr or YPbPr.
Composite Video	' The output of video tape players and some computers, characterized by
	synchronization, luminance and color signals combined on one output cable.
Contrast (ratio)	' The degree of difference between the lightest and darkest areas of the image.
Convergence	' The alignment of the red, green, and blue elements of a projected image.
Curved Screen	' A projection screen which is slightly concave for improved screen gain. Curved
	screens usually have screen gains, which are greater than 1 but viewing angles much
	less than 180°. Curved screens are not recommended for use with this projector.
DMD ' Digital Micromirror Devices used in this projector for processing red, green, and
	blue color data.
Decoder	' This device converts NTSC 3.58, NTSC 4.4, PAL, PAL-N, PAL-M, or SECAM to
	RGB video.
Detail	' The sharpness of a display from a video source.
Diffused Screen	' A type of rear-projection screen which spreads the light striking it. Screen gain is less
	than 1 but audience viewing angles are increased.
Display Setting	' An adjustment that affects the display of an image. Such display settings include
	contrast, brightness, tint, blanking, size, offsets, and others.
Flicker	' A very rapid variation in image brightness caused by a frame rate that is too slow.
	(See Interlace) See also Lamp Flicker.
Frame Rate	' The frequency at which complete images are generated. For non-interlaced signals,
	the frame rate is identical to the vertical frequency. For interlaced signals, the frame
	rate (also known as field rate) is one half of vertical frequency.
Foot-candle	' The intensity of visible light per square foot.
Foot-lambert	' The luminance (brightness) which results from one foot-candle of illumination falling
	on a perfectly diffuse surface.
Gain or Screen Gain	' The ability of a screen to direct incident light to an audience. A flat matte white wall
	has a gain of approximately 1. Screens with gain less than 1 attenuate incident light;

screens with gain more than 1 direct more incident light to the audience but have a narrow viewing angle. For example: An image reflecting off a 10 gain screen appears 10 times brighter than it would if reflected off a matte white wall. Curved screens usually have larger gain than flat screens.

A-2 RPMX/CX50/CX60/CX67 User’s Manual