idk, i haven't studied much into the workings of cable internet, one of the few things I can't find a ton of literature on, I know it was showing very low negatives before line amplification, and would lose signals, and now with line amplifcation, it's showing low positives...so I was wondering if the amplifier sucked, but then forgot that it can work with negatives...whatever, i'm not going to question it as long as it keeps working...