Splicing an HD antenna into my Comcast cable coax

[mtbkr]

for starters, i am a comcast supervisor. if you splice the antenna into the cable it can cause upstream noise to be back fed into the cable and then this noise will be amplified by the booster in your attic. this noise can kill your internet and if the noise is bad enough it can cause a internet and phone outage in your node. second, the tech that hooked up that amp in your attic should have never ran your internet line through it, just the t.v signal. i would recommend that you do not try and run the cable and antenna at the same time. hook up your antenna to make sure it works the way you like. if it does then set up a appointment for a tech to come out and make sure that your internet has its own outlet(bypassing any splitters or the amp), then tel him you no longer want the video service and disconnect it.