Pathway LR Manual - Manual (Page 54)

DMXPathfinder LR DMXPathfinder Operations
53
Chapter 7: DMXPathfinder Operations
S
YSTEM
O
VERVIEW
The entertainment industry standard DMX512 data protocol is being
utilized for remote control of a wide range of lighting and effects equipment
within theatres, television studios, theme parks and other facilities. Increasingly,
a high degree of integration of this type of equipment within a common control
network is required. DMXPathfinder LR by Gray Interfaces is a 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 is usually referred to as a DMX
Distribution System, in that it is essentially a means of distributing digital
multiplexed (DMX) control signals to a number of locations throughout a 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. These rules are intended 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 DMXPathfinder LR and the layout 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 control system, which
includes main and auxiliary lighting control consoles, dimmer racks, color
scrollers and all other equipment controlled specifically by DMX signals. As an
installed facility, the DMX Distribution System fulfils 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 location in the
facility without the necessity of extension cables.
.3 A means of "patching" or “routing” a number of DMX control signals
selectively to any or all locations.
.4 To accomplish the above while maintaining proper cabling practice
and adhering to all relevant standards.