Christie roadie 25k User Manual page 159

Hot Spot
Input
Input Signal
Interface Module
Interlace
Keystone

LampLOC
Linearity
Line of Best Viewing

LiteLOC
Loopthrough
(Loopthru)
Lumen
Luminance
image that can be projected to one side of the lens center without degrading the
image quality.
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A circular area of a screen where the image appears brighter than elsewhere on the
screen. A hot spot appears along the line of sight and "moves" with the line of sight.
High gain screens and rear screens designed for slide or traditional movie projection
usually have a hot spot.
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A physical connection route for a source signal, described by a 2-digit number
representing 1) its switcher/projector location and 2) its slot in the switcher/projector.
In this projector, sources connected at a switcher must be selected at the switcher
rather than the projector.
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Signal sent from a source device to the projector.
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A device, such as the Dual SD/HD-SDI Module, that accepts an input signal for
display by the projector.
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A method used by video tape players and some computers to double the vertical
resolution without increasing the horizontal line rate. If the resulting frame/field rate
is too low, the image may flicker depending on the image content.
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A distortion of the image which occurs when the top and bottom borders of the image
are unequal in length. Side borders both incline in or out, producing a "keyhole"
shaped image. It is caused when the lens surface is not parallel to the screen.
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A Christie software feature where internal samples of light in a projector guide the
precise position of the lamp along 3 axes—vertical, horizontal and distance to lens—
so that lamp performance and output is maximized. Not available in all models.
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The reproduction of the horizontal and vertical size of characters and/or shapes over
the entire screen.
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When light from a projector is incident on a screen, the light reflects from the screen
such that the angle of reflection equals the angle of incidence. The Line of Best
Viewing is along the line of reflection.
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A Christie software feature where samples of output light from a projector trigger
automatic adjustments in the lamp ballast power in order to maintain a constant light
output over time. Also known as brightness tracking. Not available in all models.
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The method of feeding a series of high impedance inputs from a single video source
with a coaxial transmission line in such a manner that the line is terminated with its
characteristic impedance at the last input on the line.
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The unit of measure for the amount of visible light emitted by a light source. Rarely
used in cinema applications, but common in most other projection applications.
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The signal representing the measurable intensity (comparable to brightness) of an
electronic image when the image is represented as separate chrominance and
luminance. Luminance also expresses the light intensity of a diffuse source as a
function of its area; measured in lumens or candles per square foot (1 lumen per
square foot = 1 footlambert). SMPTE RP 98 calls for a luminance of 12 to 22
footlamberts for theatre screens. See: Footlambert.
GLOSSARY
Roadie 25K User's Manual
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