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Chapter 7—Glossary
HJT Model 100 User's Guide Glossary-3
Hertz (Hz) The standard unit of frequency. One Hz is equal to one
cycle per second. A Kilohertz (KHz) is 1,000 cycles per
second and a Megahertz (MHz) is 1,000,000 cycles per
second.
H-Grid Test pattern of rows of H's on screen. Used as a
focusing aid.
Highlighted Channel The channel that has been selected by scrolling through
the channels list with the arrow keys or selected by
pressing a channel number but has not yet been made
active by pressing Enter.
Horizontal Scan (H-Freq) The rate at which horizontal lines are made to
Frequency scan on a CRT. Controlled by Horizontal sync from the
signal source.
Horizontal Scan Reverses the image projection for front or rear
Reversal Jumper Information on this jumper can be found in the
HJT Model 100 Projector Service Manual.
Hue Also referred to as tint. A specific color such as blue,
pink or aqua. Hue or tint control on a display device
adjusts red/green balance.
ILA
®
(Image Light Amplifier ) A device that uses low-intensity images to phase
modulate a high-intensity light through a liquid crystal
layer. It is the key component in producing very bright,
high resolution images from Hughes-JVC large-screen
projectors.
Intensity Concentration of information or what would be seen if a
black and white version of the image is displayed.
I/R Windows Receives projector control signals from the I/R remotes.
Keystone Adjustment Corrects lines nearest to the screen edge to make them
straight and parallel to the center line of the test pattern
or square to the screen edge. The keystone adjustment
is performed on green only and affects RGB.
Keystoning Distortion resulting from having the projector not placed
on axis with respect to the screen.
Lamp Assembly Behind the optics assembly, the arc lamp and "cold"
mirror are mounted in a chamber.