Electrohome Marquee Ultra Series User Manual page 105

I
GLOSSARY
Display Setiing
F/icker
Frame Rate
Foot-candle
Foot-/ambeR
Gain or Screen
Gain
Gamma Correction
Geometry
Help Page
Horizontal
Frequency
Hot spot
Input
/mage Shifter
Module
The level of a display adjustment. Some display adjustments are: Contrast,
Brightness, Blanking, Bow, Size, Keystone, Pincushion, Focus and
Convergence.
A rapid variation in brightness created when the frame rate is too slow. (See
also Interlace.)
The frequency at which complete images are generated. For non-interlaced
signals, the frame rate is identical to the vertical frequency. For interlaced
signals, the frame rate is one half of vertical frequency.
The intensity of visible light per square foot.
1
foor-candle = 1 lumen/square foot = 10.76 lu.x
The
luminance (brightness) which results from one foot-candle of illumination
falling on a perfectly diffuse surface.
The ability of a screen to direct incident light to an audience. A flat matte
white wall has a gain of approximately 1. Screens with gain less than 1
attenuate incident light; screens with gain more than 1 direct more incident
light to the audience but have a narrow viewing angle. For example: An
image reflecting off a 10 gain screen appears 10 times brighter than it would if
reflected off a matte white wall. Curved screens usually have larger gain than
flat screens.
A feature provided on
Marquee Ultra Series, 9500DM
and 8500SM models
which boosts the blue color output when required to provide improved picture
intensity and color uniformity.
The reproduction of a straight and rectangular image.
A display of help information on the projection screen.
Also called horizontal scan rate or line rate, this is the frequency at
lines are generated. Horizontal frequencies vary amongst sources.
which scan
A circular area of a screen where the image appears brighter than elsewhere on
the screen. The hot spot always appears located along the line of sight and
"moves" with the line of sight. High gain screens and rear screens designed
for slide or movie projection usually have a hot spot.
A physical connection route for a source signal defined by two numbers; a
switcher number
and a slot
number.
If the switcher number is O, the input is a
projector input.
An optional interface module which can lengthen CRT life while maintaining a
bright picture by slowly shifting the image about the CRT faceplate. Image
shifting occurs both horizontally and vertically. Shift range is totally
controllable by the user. NOTE: Standard on the 9500LC.
A-3