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R
RCD
Residual Current Device. Protects the user against short circuit (earth
faults) and earth leakage caused by damaged cable or faulty equipment. A
RCBO is a combined MCB and RCD, protecting against earth leakage/short
circuit and overload. Known as a GFI (Ground Fault Interruptor) in the USA.
RDM
Remote Device Management. New lighting control protocol (officially ANSI
E1.20 standard) currently under development at ESTA, which allows two-way
communication over standard DMX512 cable.
RE-RIG
To change the lighting rig after the last performance of one show to the
positions for the next show.
REDHEAD
800W open-faced adjustable flood lamp used in film / TV lighting. So-called
because of it's red paint finish.
REMAINDER DIM
A command used on Strand Lighting memory control desks which is comparable
to the SOLO function on other desks. For example, entering CH 5 REM.DIM will
put channel 5 at full and will put everything else at zero.
RESISTANCE DIMMER
A now obsolete method of dimming which decreases the current available to
the load by introducing a variable resistance between supply and load. The
excess current is converted into heat. Based around a rheostat.
RESOLUTION
1) The point during a drama when the plotline reaches a conclusion, and
conflict is resolved.
2) A measure of the quality of a video display
3) The quality of a sound sample is measured by the sample rate (e.g.
44.1kHz is CD quality sample rate) and the resolution (either 8 bit or 16
bit normally).
RESTORE
A cue to resume or return to any previous state, setting or function. (e.g.
"at the end of the dance number we restore to a warm general cover").
Submitted by Bert Morris.
RETROFIT
A modification that can be made to an existing piece of equipment after
purchase to bring it up to date.
RFU
Remote Focus Unit. Name used by ETC for a remote control for the lighting
desk. Same as RIGGERS CONTROL.
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