High End Systems Cyberlight User Manual page 138

Glossary
Additive color mixing
The creation of colors by superimposing red, green and blue light sources. The intensities of
red, green and blue light determine the resulting color. This method is commonly used in TVs
and projection TV/video devices. Additive color mixing done in this way is also called the
RGB (red-green-blue) color model.
See also "Subtractive color mixing".
Block addressing
The Cyberlight is a block-addressed fixture; that is, you do not address it at an arbitrary DMX
starting address per se, but rather at a channel boundary. There are two channel boundaries
you can select: 15-channel and 20-channel. If you choose to control your Cyberlight on a 20-
channel boundary, for example, each fixture takes up a contiguous block of 20 DMX channels.
The more channels per fixture, the more features you can control.
See also "Fixture number".
Central access door
Typically the most commonly-opened door on Cyberlight, where the color, effects, rotating
and static litho wheels may be accessed. Figure 1-2 on page 1-11 shows all three Cyberlight
access doors.
Channel boundary
The first address of a fixture's block of addresses. For example, a Cyberlight set for fixture
number 2 in 20-channel DMX mode 1 or 2 would have a channel boundary at DMX channel
21.
See also "Block addressing" and "Fixture number".
Color temperature
A term used to describe the balance or content of each spectral component of white light.
Color temperature, in turn, relies on the concept of the black body. A black body is a
theoretical object that absorbs all of the energy that contacts it. Heating a black body causes it
to emit radiation. When the spectral composition of a black body matches the spectral
composition of a white light source, the temperature of the black body (in degrees Kelvin) is
the color temperature of the light source.
For example, a light source that is rated at 5600° Kelvin (such as the light source used in
Cyberlight) matches the radiation of a black body heated to 5600° Kelvin.
Because not all light sources exhibit a smooth spectral power distribution, color temperature is
an approximate measure of a lamp's spectral output.
Glossary G-1