good that you got things sorted, I had similar issues but my power levels were like minus 11, I had a signal booster that I wasn't using so hooked it up to the cable that goes into the hub and just altered it until I got power levels as close to 0 as possible across the board, I noticed when I cranked the booster up to full power I got power levels of 16 lol, but mostly my power levels are around 1 average now and my viewing experience is alot better now, some channels will always run shite, nothing can be done about those ones but the majority working fine is the main thing.