Choosing DMX Cable: Why Microphone Cable Will Let You Down
Mic cable seems to work over short runs, but DMX is a 250 kbit/s data link. Why 120 Ω impedance matters and what to look for in the right cable.
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DMX Topology: Daisy Chain, Star Wiring and the Y-Splitter Trap
Why can’t you split DMX with a Y-cable? Bus behaviour, stub reflections, active splitters, and the one-terminator-per-branch rule.
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What Is a DMX Terminator? The Cheapest Fix for Flicker
A 120 Ω resistor at the end of the line stops signal reflections, the usual cause of DMX flicker. Where it goes, when you need it, and how to build one.
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DMX Splitters and Opto-Isolators: Protecting Your System
A splitter regenerates the DMX signal and gives each branch its own independent line. With opto-isolation it also stops electrical faults spreading through the rig.
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Earthing, Noise and Electrical Isolation in DMX Systems
Why does a rig that works on the bench flicker on site? Common-mode voltage, ground loops, screen bonding, dimmer noise and the role of opto-isolation.
