All, I have an Tivo Series 3 HD that I initially recieved HD service from Comcast with 2 cable cards. I hooked up an antenna and downgraded the comcast service to basic cable, so I get HD over the antenna and non-hd from comcast. I'm paying $40 for basic cable, and an extra $40 a month for two cablecards. Can I eliminate the cablecards and just use the cable connector? Will it work in theSF bay area?