JVC 250 S-Video, Saturated Color, Scan Line, Scan Rate, Synchronization, Source input

Glossary

S-Video	An image signal that has the luminance (Y)
	information separated from chrominance (C)
	information.
Saturated Color	1) A color as far from white, black or gray as it
	can be (i.e., vermilion rather than pink). 2) A
	display misadjustment that results in unnaturally
	bright colors.
Scan	To scan, is to move across the image frame, one
	line at a time, either to detect the image, as in an
	analog or digital camera, or to refresh a CRT-
	based display.
Scan Line	One horizontal line in a graphics frame.
Scan Rate	The frequency or times per second one line is
	scanned across an image display device such as a
	CRT.
Synchronization	Also called “sync” for short. Pulses that time the
	display of image information to the horizontal and
	vertical CRT deflection. Signals included with the
	source input that control the monitor's scan
	circuits to properly time the lines and frames of a
	picture.
Source input	The source of image and sync signals being input
	into the projector. Typical source inputs are:
	Computers, VCRs, Image generators, Satellite
	feed.
Technician Remote	Remote control used during Model 250 setup and
	adjustment. Alternative to Standard Remote.
	Provides access to many of the setup functions by
	direct keys instead of by menu maneuvering.
Throw Distance	Distance from the projector to the screen.
Underscan	Decrease raster size horizontally and vertically so
	that all four edges of the picture are visible on the
	display.
Vertical Height Pots	Potentiometers located on the Horizontal/Vertical
	Deflection PCB. Used to adjust vertical height.
Vertical Resolution	The amount of detail that can be perceived in the
	vertical direction. The maximum number of

A-4 Model 250 Service Manual