Originally Posted by Capmeister
The signal coming in from that cable isn't going to be the same as NTSC or ATSC tuner, so it won't do anything for you unless somehow the cable is carrying those signals. More likely, it has a QAM signal which I don't believe the OTA turner can handle. See what you get hooking it up--no harm--but probably nothing.
And you should be able to dual record off the normal cable input, just not anything you can't receive without a cable card (make sure you don't do cable card setup).
Why should I not do a cable card set up later when I get digital cable? They are going to drop analog cable in my area soon. At that point I'll need a cable card. I thought there was a way to do dual tuner with a cable card or multiple cable cards?
"Do I need one CableCard or two?
On the TivoHD, one M-CARD supports both digital cable tuners. If your cable provider only has the discontinued S-CARDs, then you will need two.
Note the discontinued $799 TiVo Series3 (silver front with orange OLED screen) always requires two CableCards -- regardless of type -- to support both tuners. The TivoHD uses newer components, and one of the advantages of that is full support for M-CARDs."