DMX vs Microphone XLR Cables

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DMX vs Microphone XLR Cables

Postby midnightmike » Fri May 22, 2009 5:44 pm

Will Microphone cables make Lights work Eratic? What i understand is that they are the same cables, Except they are wired different at the Pins. Is that right? Are the cables labled DMX? Have to ask questions.
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Postby xavier25 » Fri May 22, 2009 6:00 pm

I mix both of them on my rig. DMX and Speaker cables at the same time and never notice any problems.
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Postby cmbmusic » Fri May 22, 2009 6:08 pm

Sometimes mic cables used in a dmx setting can cause problems. It is recommended that you use dmx cables for dmx applications and have a signal terminator on your last fixture in the chain.
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Postby Alan Wood » Tue May 26, 2009 3:55 pm

Casey is correct,

Microphone cable has a characteristic impedance of approximately 600 Ohms, DMX has an impedance of 120 Ohm, they are not the same. Microphones are low-frequency analogue signals and DMX are hi-frequency digital RS-485 (now EIA-485) signals.

Microphone cables will work most of the time on small systems but using them is NOT recommended and can lead to trouble with signal reflections (Erratic behaviour). DMX should use a cable such as Belden 8102 or 43906.
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