Glossary Of Terms - Hughes JVC Model 200 Service Manual

Glossary Of Terms

Amorphous
Arc Lamp
Aspect Ratio
Bandwidth
Chrominance
Cold Mirror
CRT (Cathode Ray Tube)
Dichroic Mirrors
Field
Frame
Model 200 Service Manual
Without definite form; not crystallized.
The xenon arc lamp in the Model 200 projector. It
operates at high temperatures (160° to 200°) and
produces dangerously intensive light with
hazardous levels of ultraviolet and infrared
radiation.
The ratio of the picture width to picture height.
The standard U.S. television aspect ratio is four
units wide to three units high (4:3). High Definition
Television (HDTV) is 16:9.
The transmission or reception capacity of a
computer or communications channel measured
in bits per second in digital and in Hertz in
communications. Bandwidth is the difference
between the lowest and highest frequencies
transmitted or received. Wider bandwidth
provides more information or picture detail
capability.
Abbreviated as "C." Color information signal or
signals.
Mirror that absorbs infrared light so that its
reflection contains only "cold' light that does not
transmit appreciable heat. As a result of this
absorption of infrared heat radiation, "cold"
mirrors get quite hot.
The vacuum tube used as a display screen in
video terminals or television sets. Commonly
called the picture tube.
The white light of the xenon arc lamp is separated
into red, green and blue by means of dichroic
mirrors which reflect only one color and pass all
others.
One half of a complete video frame. Odd lines in
one field and even lines in another make up one
frame.
One complete TV picture or screen of
information. It is composed of two fields and has
Glossary
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