said by Phess:Ok here is what I found. My downstream channels were all 16dbmv and above. My cabling in the house is only 5 years old. The main line from the outside coming in goes into a -3.5db splitter with 2 outs. Cable modem wall outlet led to on of those -3.5db out. The other out goes to a -7db splitter for my TVs. I put the cable modem line into the -7db splitter instead and now Im getting 9-10dbmv on the downstream. Ill give this a shot and see if it helps. Comcast came and replaced one big splitter with those 2 splitters about 2 years ago because there was a signal issue. Turned out to be a bad cable from cable box to tv... yea really.
and it still may turn out to be IG's issue...