It appears to be a Giga Pocket® MPEG2 Realtime Encoder board with TV Tuner and it appears you have the following inputs: S-Video Input (rear) Composite Video/Audio Inputs (rear) Coaxial Input (VHF/UHF)
At a guess, you will be able to pick up analog channels from the Comcast coax cable out from the wall (assuming there are any) and/or possibly whatever the coax out provides from the Comcast box (though I'm not sure how tuning channels will work for that).
I have no idea if that will give you access to any HD channels or not -- are you getting HD channels from that Comcast box when it's connected to your TV? -- ♬ Music is life ♬
onebadmofo Repost These Nuts In Your Mouth. Premium join:2002-03-30 Reading, PA kudos:1
The PC is about 7 years old. I get no HD channels from this box at all. If I connect the cable directly to my TV, bypassing the box I get nothing. ..nothing at all. -- Photoshop these nuts in your mouth.