Just upgraded to a Series 3 (due to new HD LED tv). Old set-up - analog TV, antenna, digital-to-analog converter, IR blaster hooked up to Series 2 Tivo and set in front of converter "eye". Worked like a champ. I still have an antenna hook-up with the Series 3, but I don't see an input for the IR blaster. On the Series 2 it was labeled "Channel Change IR". Since I wanted to use my receiver more with the TV, I thought I'd put the receiver in the cabinet section not behind doors. So, my Tivo is now behind cabinet doors. Eventually I'll reconfigure my Harmony remote for the new configuration, but either way I don't think that matters. It needs access to the Tivo. I need to find a way to change the channel on the Tivo behind cabinet doors. Is there a way to use my IR blaster cable? Everything I've read online references something like the Smarthome Hidden IR Repeater System. Would rather not spend the extra dollars if my IR blaster will somehow work.