Robertdazzler Posted April 20, 2016 Share Posted April 20, 2016 Gelstream can be controlled by either DMX or +10V analogue as provided. An option is available to internally change the analogue to -10V ( Strand) or 5V. Jumpers j1 and J2 are provided but instructions are very vague about this aspect. I am assuming that one jumper sets polarity and one voltage but which one? I could use DMX but that ties up precious channels. I have a couple of Strand analogue desks and would prefer to use these. I have had all the information available from AC Lighting but this aspect is not adequately covered. Suggestions please. Link to comment Share on other sites More sharing options...
alexforey Posted April 24, 2016 Share Posted April 24, 2016 Instead of changing the polarity inside the scroller, could you just rewire a -10V cable to +10V by switching the ground and positive? Link to comment Share on other sites More sharing options...
Robertdazzler Posted April 25, 2016 Author Share Posted April 25, 2016 Hi Alex Possibly is the answer. Gelstream has its own internal power supply so if only one unit was concerned we are only talking potential difference so fine. I want to control 4 units from a common analogue desk so all 4 units will be commoned together on the positive line which may not be good. I am reluctant to try it as I can't risk damage because so little information is available for these things. Link to comment Share on other sites More sharing options...
alistermorton Posted April 25, 2016 Share Posted April 25, 2016 Swapping the polarity of a multicore would be quite a job. You could install a polarity inverter at each fixture, or engineer a solution at the send end, but either way it's not going to be trivial. Link to comment Share on other sites More sharing options...
timsabre Posted April 25, 2016 Share Posted April 25, 2016 Can't you just try setting the jumpers and testing what works? There's only 4 combinations... Link to comment Share on other sites More sharing options...
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