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Forum: RDM Physical Layer/Hardware Discussion April 14th, 2008
Replies: 4
Views: 7,280
Posted By jdurand
I have been carefully reading the RDM spec. and...

I have been carefully reading the RDM spec. and the DMX512-A spec. and they both say the termination is 120 ohm impedance, NOT resistance. Also, the RDM spec. says the differential voltage shall be...
Forum: RDM Physical Layer/Hardware Discussion April 11th, 2008
Replies: 4
Views: 7,280
Posted By jdurand
Since I'm making user-programmable hardare, I...

Since I'm making user-programmable hardare, I can't assure they're actually using RDM or something else. Are there any other uses for the EF1/2 in DMX512-A that would require some other termination?...
Forum: RDM Physical Layer/Hardware Discussion April 5th, 2008
Replies: 4
Views: 7,280
Posted By jdurand
AC coupled termination

I'm updating some of our hardware and figured it's time to add more support.

A draft copy of DMX512-A that I have suggests using AC coupled termination (0.047uF in series with 120 ohm). That...
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