Erratic pixels

[jtindale]

Hey all,

I'm trying to get a couple of strands of RGB pixels working but I having some issues.  I'm using LOR bullet pixels, two strings of 50 connected together.  When I use the HU to test the pixels, they work well.  When I play a simple sample sequence, the first 3/4 pixels blink erratically.  I have tried different strings and I have tried a pixie4 and a pixie8, both exhibiting the same behavior.

I have a high speed adapter and I have also tried from a G4 Director and get the same results.

You can tell from this image this first few pixels are random colors.  Its this way if the sequence is all white, all red, all green, in a chasing motion effect, etc.

Any ideas what may be causing this?

Edited November 10 by jtindale
added question

[jtindale]

More information.

I'm using a LOR regular network, enhanced, and set to 500k.  Pixies are new and using firmware 1.10.

[TheDucks]

Well,  My normal answers don't work here unless you have a big coil of CAT5 between the adapter and the Pixie.

OTOH do put a (usually black) jumper on JP4 (it is under the CAT jacks ON the LAST controller on a network only. This should not matter in your case, but why not

The other standard answer usually applies to the LAST nodes (lower voltage causes color shift)

💡💡 You have a sequence error.  Those nodes appear in more than 1 place in that show (at the same time)

[jtindale]

TheDucks, I really appreciate your reply.  I tried JP4 and that didn't help.  Any by the way, my CAT cable length was only about 18".  

Your comment about sequencing got me thinking.  I created a new test with a new preview (only thing was a single strand of RGB pixel) and it worked fine.  I went back to original preview and its working now too.  I'm not sure what it was, but it did seem to be some sort of gremlin in the sequence.

Thanks again!

[TheDucks]

38 minutes ago, jtindale said:

TheDucks, I really appreciate your reply.  I tried JP4 and that didn't help.  Any by the way, my CAT cable length was only about 18".  

Your comment about sequencing got me thinking.  I created a new test with a new preview (only thing was a single strand of RGB pixel) and it worked fine.  I went back to original preview and its working now too.  I'm not sure what it was, but it did seem to be some sort of gremlin in the sequence.

Thanks again!

I hate GREMLINS.  They tend to show back up at the worst of times. 

With 18" I did not expect JP4 to help. For a normal install, terminated RS485 is proper.