DirecTV HD TiVos will include 2 Over-the-Air (OTA 8VSB) ATSC tuners (split from a single coax input). These allow you to receive/record local digital/HDTV broadcasts using an antenna.
DirecTV HD TiVos will also include 2 DirecTV SD/HD tuners (2 coax inputs) which can receive/record standard definition and high definition programming from DirecTV.
At any one time, two of the four tuners can be active for recording. So you can record 2 OTA (local) shows, 1 OTA (local) and 1 DirecTV SD show, 1 OTA (local) and 1 DirecTV HD show, or 2 DirecTV HD shows.
