26
RDM System Flow
The SHoW DMX system also functions as an RDM proxy system, by passing RDM commands
and replies back and forth between any connected RDM controllers and responders. As with
DMX, the principal thing to remember about RDM function is that the transmitter and receiver(s)
replace
DMX cable. The main difference between DMX and RDM operation is that RDM is a
two-way system and so both transmitters and receivers may need to function as wireless
broadcasters or receivers of the RDM data.
In RDM mode, the SHoW DMX transmitter converts incoming RDM commands to a radio signal
and broadcasts them to the SHoW DMX receiver (or receivers). The SHoW DMX receiver takes
the radio broadcast and converts it back into standard RDM data, then responds to it and/or
passes it along to connected RDM responders, collects any reply data from the RDM
responders, then converts the RDM responses back to a radio signal which is broadcast back to
the transmitter. The transmitter converts the radio signals from the receiver back to wired RDM
and sends it back upstream to the RDM controller. Note that as shown in the drawing, the RDM
controller can be a separate system, or RDM control may be provided from an RDM enabled
lighting control console.
