Heath Robinson
Systems Engineer
Hi! I have a room where I would like to send a DMX signal from a rack location to another part of the room, unfortunately it seems installing a CAT6 cable and using twisted pair (or installing any new cable at all) is not an option.
I have only existing cables which can be used, and those existing cables happen to be HDMI cables and have a mass of cores inside (I cut an end off). Mostly stranded, some mini co-axial, but certainly no twisted pair.
Now DMX is like RS-485, it is a differential signal and I although it is tolerant of interference I am concerned it may pick up glitches over the 30m/80 feet cable run. Also that the digital signal will radiate interference badly when sent over regular parallel stranded cores and not a twisted pair. What I really want is a neat idea for some kind of signal converters I can add at each end to convert to a more interference tolerant, less radiant type signal. But that is kind of where my knowledge runs out. I don´t know if what I am imagining as a solution to my problem does exist, or if it´s a pipe dream.
I´m aware the real answer is "install some CAT cable, or some other twisted pair", it´s just that no cable route exists.
I have only existing cables which can be used, and those existing cables happen to be HDMI cables and have a mass of cores inside (I cut an end off). Mostly stranded, some mini co-axial, but certainly no twisted pair.
Now DMX is like RS-485, it is a differential signal and I although it is tolerant of interference I am concerned it may pick up glitches over the 30m/80 feet cable run. Also that the digital signal will radiate interference badly when sent over regular parallel stranded cores and not a twisted pair. What I really want is a neat idea for some kind of signal converters I can add at each end to convert to a more interference tolerant, less radiant type signal. But that is kind of where my knowledge runs out. I don´t know if what I am imagining as a solution to my problem does exist, or if it´s a pipe dream.
I´m aware the real answer is "install some CAT cable, or some other twisted pair", it´s just that no cable route exists.
