Sorry if this is a duplicate but couldn't find the answer on the forum. I have a cable from Charter and without a box it receives the basic network channels using the tv. I also have an antenna that also receives lesser amount of channels. I just got a TiVo and it works fine using the antenna. I then tried to use the cable plugged into the antenna plug and rescanned. It said it found channels but none of them seem to work. I tried several times with no luck. If the cable works on the tv why wouldn't it work on the TiVo box? I was thinking the cable would be a better choice as there are more channels and in theory should be more stable. Is there a trick to this or should I forget the cable?