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Appendix D Glossary of Terms D-5
D
Dim
Use this Construct to vary the dim (intensity) level of the selected fixture. The Scene and
Sequence windows display the percentage of dim as you vary the control from 0 (dark) to
100% (maximum brightness). Use the <DIM> control with the <XFADE> key to set the
crossfade time. When you assign a Scene or Sequence to a Fader Preset, the associated fader
controls the dim of that Scene or Sequence.
Dimmer
An electronic device which controls the amount of electricity passed to the lamp of a luminaire
thus controlling brightness.
Disks
An apparatus for storing and retrieving data.
Diskettes
Typically a 3.5 inch magnetic floppy disk used to transfer files between Personal Computers.
DMX-512 Protocol
DMX-512 is a standard method of controlling lighting fixtures and other devices (such as
lasers and hazers). Developed by the United States Institute of Theatre Technology (USITT),
DMX-512 is supported by leading entertainment industry equipment manufacturers, such as
High End Systems.
DMX 512 (D for digital, MX for multiplex and 512 is the number of channels per link) is a
reliable, efficient and well-understood method of controlling lighting devices. Its strength lies
in the ability to control a large number of different types of devices made by various vendors
on the same link using any DMX-compatible controller.
See also “LWR Protocol.”
DMX Address
The DMX-512 protocol allows a total of 512 addresses to be used on a particular link. A link is
a group of devices connected by XLR cabling. You need to assign a unique fixture number to
each luminaire you wish to respond independently to control commands. Multiple fixtures can
be assigned the same address if you wish them all to respond to control commands in the same
way.
DOS
Disk operating system. Basic operational control for computers.
Effect
Key group which controls the special effects constructs for luminaires.