"Using cable modem line for tv input for computer"

Hi,
I just bought myself the ATI All-in-Wonder Radeon 9700 pro graphics card. It has a built-in tv tuner and I'd like to connect it to my houses cable tv service. In my office, where the computer is, the only coaxial cable present is for the cable modem. I was wondering if I could split the coaxial cable going into my cable modem and use the 2nd, split line, as the cable tv feed. Would doing this affect my cable modem performace i.e., weaken the signal?

Thanks,
Tom

you probably could split the line however depending on if the line is split coming into the house you could run into problems with a second split.

It might affect performance or your modem might not sync up at all. At my other apt, I split the line and it was fine. Try it and see, splitters are cheap. Good luck

Mike