TIVO Sires 2 signal tuner. I have direct TV HR/24 with a AM21 offair tuner TIVO program guide does not support this. If I add a off air tuner I get the correct program guide but when I want to see or record a program the TIVO looks for a RF input there is no RF outputs. from direct tv HR/24 with the AM21. It is incorporated in the direct tv guide just like any other DBS channel. all functions and playback uses the same cables. Again no RF output. I have asked and open multiple tickets it appears TIVO support is outdated and not current with the info they send. I also have Bright House which is now Spectrum using a Samsung cable set up box Samsung model SMT-H3362 will not change channels with TIVO your support team does not support this unit from the cable company?