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DMX Oscilloscope pictures
From wiki.openlighting.org
There is always discussion about the quality of DMX-USB-interfaces, so I think it is time to face this discussion with the reality. Whats more real, than oscilloscope pictures of the signal. I have done pictures of all the interfaces and consoles I could find.
We should have a complete list - so please, if your interface is not here, try to make a photo and add it.
Theory
Erwin Rol is explaining the DMX timing very good on his website - the following picture is from this this site - the important part of the signal is around the break - so I tried to catch this part with the oscilloscope
1. SPACE for BREAK
2. MARK after BREAK (MAB)
10. MARK before BREAK (MBB)
© of the diagramm by Erwin Rol
Ethernet to DMX interfaces
ETC E-Gate Plus
Website
Price: ???
Lenght of cable: 20 m
Signal strenght: 4,7 V
USB to DMX interfaces
DMXking ultraDMX Micro
Website
Price: 60 $ sometimes cheaper (39 $)
Length of cable: no cable
Signal strenght: 3,2 V
Enttec USB open
Website
Price: 60 $
Length of cable: no cable
Signal strenght: 4,2 V
Enttec USB Pro - firmware 1.44
Website
Price: 120 $
Length of cable: no cable
Signal strenght: 3,7 V
Consoles
siemens S28
one of the first DMX-consoles
Length of cable: no cable
Signal strenght: 3,2 V
Transtechnik
TRanstechnik
Length of cable: 5 m
Signal strenght: 3,2 V
