PRG Best Boy 4000 User Manual User Manual
Page 98
90
BEST BOY 4000
®
SPOT LUMINAIRE USER MANUAL
Parameter
An individual controllable aspect of a luminaire: pan, tilt, color, etc. Also known as "Attribute."
Patch
The act of assigning a DMX512 channel to a control channel on a console.
Reply
Digital data signals transmitted from each luminaire to the console. Only one luminaire may transmit at a time, in
response to a request from the console.
Signal
Control protocol from a lighting console or interface.
Show File
A file containing all programmed cue data.
Shutter
See
Framing.
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.)