The converter box simply connects to the combo there. You set that to one channel like #4 typically and use the remote for the converter box itself as the tuner to change channels. I have to add one on here in order to get more then a few basic local channels since everything went digital on May 11th.
You can run either the 75ohm cable or the RCA phono outputs for both sound and video through an S-Video composite adapter cable into the tuner card or simply straight RCA phono type patch cord direct in order to select composite from the tuner card's own application settings there.
The new tuner card here I ended up putting aside is strictly Media Center not having the old card's options for auxillery input!
For the time being I had to pull the tuner card out of an old case here for patching a vcr into it for watching a few recorded shows. Yet the new card is supposed to record one program while you watch another? But you need the converter box not straight cable to get all the channels rather then the built in channel scanner automatically adding everything in.
Eventually we will all need dvrs and call it a day at some point or watch internet tv as Xfinity now offers!