Pathway DMX Pathfinder CR Manual - Manual (Page 3)

DMX Distribution System Page 3
Operation
SECTION 1 -- OPERATION
1.1 SYSTEM OVERVIEW
The application of recent advances in computer and robotic technologies to
entertainment lighting systems have made available reasonably priced remotely-
controlled luminaires, dimming systems and accessories such as color scrollers and
fog machines.
Compatibility with the industry standard DMX512 data protocol
now offers the system designer the possibility of a high degree of integration of
this type of equipment within a common control network, but not without the
limitations imposed by proper cabling practice and system bandwidth.
DMXPathfinder by Gray Interfaces is the first fully electronic, software
programmable crosspoint switching router designed to serve as the hub of a
comprehensive data communications network for this type of equipment.
This data communications network will be referred to as the DMX Distribution
System, in that it is essentially a means of distributing digital multiplexed (DMX)
control signals to a number of locations throughout the facility. As with any
electronic communications facility, whether designed for the transmission of analog
(i.e. audio, voice) or digital data, strict rules govern the method of interconnection of
the various components and the techniques and materials used in their
construction, in order to minimize noise, transmission losses or other fault conditions
which might impair the network's operation. While most of these potential problems
have been dealt with in the design and construction of the system, certain aspects
of its day-to-day use must still be given due attention to avoid unexpected "glitches"
or even equipment failure during productions.
The DMX Distribution System is part of an overall lighting control system, which
includes main and auxiliary lighting control consoles, the dimmer racks, and all other
equipment controlled specifically by DMX signals. As an installed facility, the DMX
Distribution System fulfills four main objectives:
.1 A hard-wired means of interconnecting controls with dimmer racks and other
data receiving equipment.
.2 An available source of DMX data at or near every lighting position in the
facility without the necessity of extension cables.