OK I have searched and searched and am finding "universal" onkyo codes in both 3 digit and 4 digit flavors. I'm pretty sure that the TX's use 4 digit codes, but am only guessing based on what I have seen in my searches.

My problem is programming a Charter communications cable HD DVR universal remote control that accepts ONLY 3 digit codes, the remote model number is UR5-8400A and it goes with a scientific atlanta Explorer 8000HD.

Basically I would just like to get the aux control on the cable remote to vol up/down and mute my Onkyo. Yes I do have girder, but the delay drives me nuts and I would like to just have it directly to the Onkyo.

Thanks much.