I use a 3-to-1 combiner to add the RF output (TV1 and TV2) for 2 722s to the antenna. Then I amplify with a 1-in, 4-out, 10dB amp and feed that to the RF in on the 722s to get the ATSC signals and also to a DVD+ recorder (not in use), to the main TV, split to a nearby kitchen TV, and diplexed with a third Sat signal to a remote TV where it is separated for a 622 and the TV input. I don't worry about the antenna radiation, caused by and attenuated by the combiner, because the only neighbors are across a canyon and then 45 miles to the TV towers. I use channels OTA 60 62 64 and 66 for the RF outs as there are no OTA signals up there anymore. It is harder to find that much bandwidth unused lower down.