PRG Bad Boy User Manual 1.6 - Manual (Page 102)

94 BAD BOY ® SPOT LUMINAIRE USER MANUAL
Signal
Control protocol from a lighting console or interface.
Show File
A file containing all programmed cue data.
Splitter (Isolator)
Device used to optically isolate and split a DMX512 signal. Note: A DMX "two-fer" cannot be used to divide a signal.
Start
To energize a luminaire arc lamp (applies to arc-lamp luminaires only).
Strobe
A special lighting effect which produces multiple rapid bursts of high intensity light.
Terminate/Termination
Termination refers to the dampening of DMX signal at the end of the transmission line. Termination is created by
placing a 100 ohm resistor between pins 2 and 3 of the DMX line. Often, there is a switch on DMX devices to do this
internally. If not, a terminator is provided in the form of an XLR connector with the proper resistor between pins 2 and
3 to be placed in the DMX Thru port on the device.
Tilt
The movement of the luminaire around the axis of the tilt tube.
Time
Control of the duration of the change of the variable parameters of some automated luminaires and other devices in a
lighting system.
Timing Channel
A Timing Channel is used in lieu of cue fade rate to determine the time it will take a luminaire to move from one setting
to another. For example, a cue in which a luminaire pans from one side of stage to the other may look "steppy" if cue
fade rate is used, because of the nature of the DMX512 signal. To overcome this, a timing channel allows the luminaire
to calculate the move "in time," effectively smoothing out the movement.
Zero Position
Pan and Tilt values at 50%. Also called "Home Position" or a "50/50" cue or group.
Zoom Table
Allows the fixture to maintain sharp focus on an image throughout the zoom range. (Note that zoom tables are
sensitive to throw distance. For this reason, a variety of zoom table versions are available for use with different
throws.)
8-Bit DMX
The universally accepted lighting control protocol in the entertainment industry. A console uses this protocol to
control specific devices in a lighting system. A DMX512 channel packet is eight bits of absolute parameter data. 8-bit
refers to the resolution of the signal: 256 step resolution, providing channel values from 0 through 255. A DMX512
data packet is a group of 512 data channels.
16-Bit DMX
To smooth out the movement of automated luminaires, the industry has adopted 16-bit DMX. This is not a change to
the DMX512 specification, rather a change in the way luminaires and consoles treat DMX512 information. In practice,
16-bit DMX adds a DMX512 channel each to pan and tilt - pan coarse, pan fine, tilt coarse, tilt fine, instead of just pan
and tilt. The console and luminaire combine these levels and increase the resolution of pan and tilt from 256 steps to
a theoretical maximum 65,536 steps at the console level, resulting in the ability to position the luminaire more
accurately.