Christie Digital Systems CX50 RGB Video, RS-422, Scan Rate, Scan Line, Slidebar, Source, Switcher

	Appendix A: Glossary
RGB Video	' The video output (analog or digital) of most computers. Analog RGB video can have
	3, 4, or 5 wires — one each for red, green, and blue, and either none, one or two for
	sync. For three-wire RGB, the green wire usually provides sync. (See TTL Video).
RS-232	' A common asynchronous data transmission standard recommended by the
	Electronics Industries Association (EIA). Also called serial communication.
RS-422	' A less common asynchronous data transmission standard in which balanced
	differential voltage is specified. RS-422 is especially suited to long distances.
S-Video	' The output from certain video tape players and video equipment. S-Video separates
	sync and luminance from color information, typically producing a higher quality
	display than composite video.
Scan Rate	' The horizontal or vertical frequency at which images are generated.
Scan Line	' One horizontal line on the display.
SECAM ' A video output format of some video tape and disk players (used primarily in
	France). SECAM (Sequential Couleur á Mémoire) signals are similar in resolution
	and frequency to PAL signals. The primary difference between the two standards is
	in the way color information is encoded.
Slidebar	' A slidebar is a graphical display of an adjustable setting. The numerical setting often
	represents a percentage but can be a specific unit such as degrees Kelvin.
Source	' The device, such as a computer or VCR, connected to the projector for display. See
	also Input.
Source Setup	' See Channel.
Switcher	' A signal selector that can be connected to a projector for the purpose of adding more
	sources.
Sync	' This term refers to the part of the video signal that is used to stabilize the picture.
	Sync can occur in three forms:
	• "Composite sync": the horizontal and vertical components are together on
	one cable.
	• "Sync-on-green": the sync is part of the green video.
	• "Separate sync" or "H.SYNC and V.SYNC": the horizontal and vertical
	components of the sync are on two separate cables.
Sync Width	' The duration of each sync pulse generated by a computer. The sync width is part of
	the blanking time.
TTL Video	' A type of RGB video with digital characteristics.
Throw Distance	' The distance between the front feet of the projector and the screen. Also called
	"Projector-to-Screen Distance”. Always use the correct Christie throw distance
	formula to calculate the proper throw distance (±5%) required for your lens.
Tint	' Balance of red-to-green necessary for realistic representation of NTSC signals.

RPMX/CX50/CX60/CX67 User’s Manual A-5