Christie GraphXMASTER RPMS-D100U User Manual page 96

Help Screen
Horizontal Frequency
Horizontal Offset
Hot Spot
Input
Input Signal
Interface
Interlace
Keypad
Keystone
Lamp Flicker
Linearity
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.
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A display of help information regarding the current task or presentation.
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The frequency at which scan lines are generated, which varies amongst sources. Also
called horizontal scan rate or line rate.
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The difference between the center of the projected image and the center of the
projector lens. For this projector, this value is expressed as the maximum percentage
of the image that can be projected to one side of the lens center without degrading the
image quality. Horizontal offset ranges can be affected by the type of lens in use, and
whether or not the image is offset vertically at the same time.
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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 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.
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Signal sent from a source device to the projector.
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A device, such as the Serial Digital Input 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 small push-button device for controlling most projector settings and operation. For
more information, refer to 3.3, Using the Keypad.
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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 slant in or out, producing a "keyhole" shaped
image. It is caused when the screen and lens surface are not parallel, or (in "X"
models) by poor Keystone adjustment.
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As the lamp ages, the shape of two anodes may changes from two points to a
flattened state. When this occurs, the arc jumps across the gap from varying points.
This is seen as image flicker. Turning the Lamp Conditioning feature ON will pulse
the lamp and gradually "condition" the two anodes back to two points. Lamp
Conditioning may take seconds, minutes or hours to reach full effectiveness. NOTE:
Lamp flicker can occur at any time in the lamps life. The length of time, over which
flicker may occur varies considerably and unpredictably. This behavior is inherent in
UHP lamps.
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The reproduction of the horizontal and vertical size of characters and/or shapes over
the entire screen.
Appendix A: GLOSSARY
RPMS, CS50 & CS70-D100U/UF User's Manual
A-3