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dmx terminator


cobra513

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I ran shimmer a lot this year on my LED window frames.  I used the LOR IDMX and it worked flawlessly.. as far as I could tell. 

 

I did get some minor timing issues when I went to S3 3.9 though... at least I thought I did.. but no one could tell. Seemed to me like it was tens of miliseconds behind where it was with 3.8.  Might have been in my head, but I don't think it was... LOL  

 

Even the voices told me I was right!    :rolleyes: 

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  • 2 months later...

Ok finally wa able to spend so more time on this. I did have some wiring issues( thought I was being careful) and was able to fix them but still have an issue that I think I know where problem is. Now when I run the sequences they work fine as long as I have no twinkle or shimmer go to them, when I do that it seems to throw off the response by the lights by 1 channel more than the usb485b already does. I'm thinking the usb485 is the culprit here.

 

Termination rarely makes a difference excluding rare situations (LOR doesn't even use it).  The tools you need are a scope (to see if there is some sort of interference) and/or a digital logic analyzer (for decoding the DMX packets to see if the source of the problem is on the output side). 

 

Here are some resources that might help:

 

http://www.holidaycoro.com/kb_results.asp?ID=17

 

http://blog.holidaycoro.com/2013/03/dmx-lor-protocols-and-rs-485.html

 

Maybe that helps...

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