Christie roadie 25k User Manual page 162

GLOSSARY
Scan Line
SECAM
Show Script
Source
Source Setup
Switcher
Sync Width
TTL Video
Terminated
Throw Distance
Throw Ratio
TMDS
Unicode
Variable Scan
A-8
Roadie 25K User's Manual
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One horizontal line on the display.
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A video output format of some video tape and disc players used primarily in France.
SECAM (Sequential Couleur á Mémoire) signals are similar in resolution and
frequency to PAL signals. The primary difference between the two standards is in the
way color information is encoded.
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A small file consisting of automation cues in addition to a play list, triggering theatre
events (action data), and possibly including parameters that allow the program to be
tailored for a specific venue or engagement. A show script is created by the exhibitor
or installer and provides automated presentations. Automation available 2005.
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The device (such as a server) connected to the projector for supplying incoming data.
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See Channel.
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A signal selector such as the Marquee Signal Switcher formerly manufactured by
Christie that can be connected for adding more sources to a projector.
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The part of the video signal that stabilizes the picture. Sync can occur in three forms:
Sync
"Composite sync": the horizontal and vertical components are together on one
1)
cable.
"Sync-on-green": the sync is part of the green video.
2)
"Separate sync" or "H.SYNC and V.SYNC": the horizontal and vertical
3)
components of the sync are on two separate cables.
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The duration of each sync pulse generated by a computer. The sync width is part of
the blanking time.
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A type of RGB video with digital characteristics.
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A wire connecting a single video source to a display device, such as a projector, must
be terminated by a resistance (usually 75S for video).
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The distance between the front bezel of the projector and the screen. Also called
"Projector-to-Screen Distance". Always use the correct Christie throw distance
formula to calculate the proper throw distance (±5%) required for your lens.
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Throw ratio = throw distance / screen width. Typically used to differentiate lenses.
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Balance of red-to-green necessary for realistic representation of NTSC signals.
Tint
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Transition Minimized Differential Signaling is the basis for DVI (Digital Visual
Interface).
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The Unicode method of encoding produces a very large character set typically
required for ASCII messaging in non-Western languages such as Chinese, Russian,
etc. In unicode, every number (code) is unique to a single character. Menu functions
can be executed remotely via unicode or non-unicode (default) messaging—this is
auto-detected. See also non-unicode.
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The ability of a projector to synchronize to inputs with frequencies within a specified
range.