I use freestyler software, and I route my Martin roboscan 812 directly to it with a phase reversing cable that it needs. It responds and works just fine. then, I go to put in a par, and place it before the scanner and the reversing cable so it gets normal DMX. Now the par responds and the scanner doesn't. What could be wrong? There are obviously conflicts between the fixtures. The LED par does work with another model of par, and they are both chinese . That could be the problem, but they work fine with other fixtures, the martins might just be picky. Would a dmx splitter like this work? 1 Way in 8 Channel Output DMX DMX512 Signal Amplifier Splitter Distributor | eBay