quote:Originally posted by Elation_Pro:
For a fact the DMX signal the USB interface outputs is pretty weak because its powered by the USB power, however a 90' cable length is not really that long.
Consoles usually have a lot better dmx signal strength because they receive direct 120V power.
This is where a Opto Splitter/booster are highly recommended.
It helps the Compu behave like a console in the DMX line.
Not to mention that with the amount of fixtures you are using, you should have an Opto splitter in your system regardless of the lighting console you are using.
Like John said. the dmx going out of the dongle can be weak. the opto branch boost this signal and stabilizes and optically isolates it per output on the optobranch 4. This is really usefull as now you can run four dmx lines if you ever need to split you rig up and also if a surge or power failure ever occurs nad a spike gets sent down the dmx line it will only take out the DMX driver chip in one of the outputs on the opto thus saving your dongle. And after that you still have three outputs left. hope this helps. If not let me know where i can elaborate.
Sincerely,