USB-UIRT Forum

I have sagetv working and two Happague HD DVRs connected to FIOS STBs. When ever I tune though, it appears that all three IR ports put out the same signal. How do I get it to set the two ports on the rear jack and the one on the front (less important) to opperate independantly. The guy that makes them confirmed that this was how they worked, but I don't see an option anywhere to set them.

Any suggestions or advice would be most helpfull!