Are you talking about HDTV? If so I know nothing about it.
Or do you mean digital cable? Digital cable is just a package from your cable company that compresses more channels into your cable line so you can watch more channels and it costs them less money (thus they actually make a lot of money off of you if you use this since it barely costs them anything except for the new hardware they had to buy to send more channels on more frequencies). There is no such thing as a pure digital TV capture card, just stereo.
Normal cable operates at 30Mhz. Digital cable is supposed to use a higher frequency on the same co-axial lines to deliver content. Thus, the cable company endures no extra expenses for maintaining it. For someone who hates AT&T's cable service (or lack of it) I would be the LAST person to ever sign up for digital cable. :tongue:
This little cathode light of mine, I'm gonna let it shine!