From the antennae booster to the splitter. Each TV has coax that goes to splitter. The RCA to coax box allows the Wally to send from RCA (because bedroom and outside TV do not have HDMI, so they use coax (which goes to splitter). So if antennae booster is off the Wally will display on channel 3. If booster is on then it is using antennae for over the air TV.
