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C
CONTROL CABLE
A term describing any cable which carries control signals or protocals
between electrical or electronic devices. This signal can be as simple as a
low voltage analog signal or as complex as a bi-directional digital
protocol. Increasingly, performance electronics are utilizing computer
ether-net protocols over thin-net, or fiber-optic network cables.
CONTROL CHANNEL
A lighting control concept analogous to a control slider or fader. On manual
or preset controllers this may refer to an actual fader or slider. On a
computer memory console a channel may only be represented by a number which
is assigned by the system to control any number of physical dimmers, color
scrollers, or other devices. Generally a control channel represents the
smallest easily divisible set of controls a designer has over groups of
lighting instruments. A soft patch or pin patch is used to assign dimmers or
groups of dimmers to individual control channels.
CONTROLLER
A lighting control console or light board. Common types include the preset
board, the computer memory console, as well as specialized automated fixture
controllers such as the Vari-Lite Artisan II console.
CONVENTIONAL LIGHTING FIXTURE
A standard lighting fixture such as a PAR can, Fresnel, or ERS, which offers
no built in automated functions.
CRACKED OIL FOG MACHINE
A simple type of fog machine which atomizes oil into a fine atmosphere,
usually by introducing compressed air into a reservoir containing mineral
oil. Crackers are also available which crack water into a very fine mist.
Haze machines produce effects similar to oil crackers without leaving an
oily residue on surfaces.
CROSS FADE (X-FADE, XFAD)
A lighting design term referring to a cue in which one set of lights
increases in intensity while another set simultaneously decreases in
intensity. A crossfade is one common way in which a change of scene can be
indicated in a theatrical production. On a manual controller the master
handles literally must be cross faded from one scene bank to another to
accomplish a cross fade.
CUE (Q)
A point in a live show when a signal is given for some action to take place.
CUT 1
A cut of color. A color filter cut for use in the color frame of a specific
lighting instrument.
CUT 2
Describes an element of the show which has been removed or deleted. Often
lines, scenic items, and light cues are "cut" from a production during the
rehearsal process.
CYBERLIGHT
Originally introduced in 1993 the Cyberlight is a moving mirror type
automated fixture manufactured by Lightwave Research/High End Systems.
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