DMX: Difference between revisions

DMX (view source)

Revision as of 10:37, 24 August 2010

348 bytes added , 24 August 2010

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Michael.chislett

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 ==Infrastructure==
-DMX requires a cable impedance of 120ohms. So you must not use microphone cable! All DMX equipment operates at 120ohms. Equipment is "daisy chained" together, and each device has an input and an output (they must be the correct way round).
+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.
-YSTV runs 2 universes down a single Cat5e cable, as this is a very close impedance, and it is actually quite common to use Cat5e to run DMX
 ==Connections==
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 '''DO NOT plug dmx into any sound gear or use audio cables as a substitute, something will get fried.'''
-==Pinouts==
+==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]]
+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==
-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.