I Have a TERK FDTVO External Antenna. TO make my Sony RDRVX521 DVR/VCR Combo work I need to use a Digital to Analong converter box which dampens the antenna's performance. I Have just disconnected and now the Antenna is plugged into the back of the RDRVX521 and have noticed the same. My questions are: 1. Will Tivo premeire hampen my Antenna's performance like the digital/analog box did? 2. Could it be the problem with Antenna Performance is due that RDRVX521 which was made in 2006 is too old? Will TIVO work better?