OTA on the Hopper and Joeys work like this: Along with your antenna you need an OTA adapter from either DISH or AirTV (they are the same product just a different color and AirTV costs much less.) You attach the antenna coax to the OTA adapter and then plug the adapter into one of the Hopper's USB ports. Then on the Hopper you scan for channels and save them. This will bring those saved OYTA channels into you Hopper guide and you can watch them just like you would the satellite channels. The OTA channels will have a -1, -2, -3 (if there are sub-channels available) whereas your satellite locals will not. Example, say you have a channel 2 in you local area. The satellite channel would show as channel 2 and the OTA channels would show as 2-1, etc:
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The Joeys would receive the channels the same way. You can watch the locals up to two channels at a time on any of your TVs.