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Glossary
156
PAL
Phase Alternation by Line. A 625-line video
broadcast format used in Western Europe,
India, China, Australia, New Zealand, and parts
of Africa.
Point
A measurement of drawn or printed objects.
One point equals 1/72 inch.
Rear Projection
Projecting the image from behind the screen.
Resolution
A measure of the amount of detail contained in
an image. Resolution can be measured in dots
per inch or in pixels. Image sharpness and
clarity improve as resolution increases.
RGB
A type of color scheme that defines color as
percentages of red, green, and blue.
S-Video
A type of video signal used in S-VHS videotape
formats. It transmits luminance and color
separately.
SECAM
System Electronique pour Couleur Avec
Memoire. A 625-line TV system used in
France, Eastern Europe, Russia, and parts of
Africa.
Sleep mode
A power-saving feature in which the projector’s
lamp is turned off when the projector has not
been used for 30 minutes. In sleep mode, only a
minimum amount of the projector’s circuitry
remains on.