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DMX: Difference between revisions
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==Infrastructure== | ==Infrastructure== | ||
YSTV runs 2 lines (one each way)down a single Cat5e cable, from the control room's Master patch panel, to the LX patch panel in the studio. | |||
==Connections== | ==Connections== | ||
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'''DO NOT plug dmx into any sound gear or use audio cables as a substitute, something will get fried.''' | '''DO NOT plug dmx into any sound gear or use audio cables as a substitute, something will get fried.''' | ||
== | ==Technical== | ||
Cat5e | * DMX requires a cable impedance of 120ohms. | ||
** So you must not use microphone cable! | |||
* Equipment is "daisy chained" together, using each device's input and an output ports(they must be the correct way round). | |||
* Data+ and Data- must be a twisted pair. | |||
* Multiple types of cable will do the job: | |||
Cat5e: | |||
* Shove two lines in one cable | |||
[[File:Dmxcat5.png]] | [[File:Dmxcat5.png]] | ||
Sheilded Twisted pair: | |||
* This is the "defacto-standard" | |||
* You can get it almost anywhere, below are some retailers (no links because they inevitably die! - just go googling) | |||
** Canford | |||
** 10outoften | |||
** Usedlighting / stagelighting (lighting Partners Ltd) | |||
==Useful Notes== | ==Useful Notes== | ||
Don't run DMX right next to audio cables of any kind unless completely unavoidable, even if everything is balanced. You will hear the DMX data - The sync pulses manifest as an intermittent tone & noise. | *Don't run DMX right next to audio cables of any kind unless completely unavoidable, even if everything is balanced. You will hear the DMX data - The sync pulses manifest as an intermittent tone & noise. | ||
