Wireless DMX?

You can run DMX cable over 2000 ft without a problem, just have to work a little laying the cable out

i think the cables come in 1, 5, 10, 25, 50, and 100 foot sections.

(correct me if i'm wrong)

Well DMX is just a (fast) serial connection, so it's easy enough
to connoct the DMX to just about any radio transmitter and reciever.
You'll just need to adjust the voltages to match your circuit
and maybe put a resistor across each DMX pair.
DMX uses a 4us or 8us start pulse, so you'll want a fast, well laid
out circuit.
Maybe something designed for video if you can't find one
designed for high speed digital.

From your question I'm assuming that you are comfortable
looking at schematics and understanding them.
With DMX, the ground wire isn't really used.
It's just a question of whether the relative voltage between
pin1 and pin2 is positive or negative.
(-7V to +12V)
To hook that to a generic transmitter, add a +24V bias, use
ohms law to find the right resistor/voltage divider to match the now
+36V feed to your transmitters input.

On the recieving end, you'll get high pulses and low pulses.
These will be coming at up to 250Kbps.
Use a potentiometer on your amplifier to adjust the high pulses up
around +24V, at point which the lows should be around +7V.
Throw in a negative bias of -12V and that's your DMX out.


Ray

quote:

Originally posted by Support:
[qb]You can run DMX cable over 2000 ft without a problem, just have to work a little laying the cable out [/qb]

Not when the ONLY way to get it there is via the dance floor or past a glass atrium... :-)

quote:

Originally posted by Raymor:
[qb]
Throw in a negative bias of -12V and that's your DMX out.


Ray[/qb]

You, sir, ROCK! That is easy enough. Really - that is easy enough - I didn't want to purchase the DMX spec, and wasn't sure about the data rate or if it was a simple serial protocol. Thanks!

- Hans