Anyone in the DFW area (or anywhere really) with DirecTV have the AM21 addon ATSC tuner? It's my understanding that it does not scan for channels so I'm curious as to what the OTA line-up looks like. My folks live out in Lavon and have an older rear projection 16:9 TV without a built in ATSC tuner. My father misses access to 8.2 for WX. They recently switched from Dish and have an attic mounted antenna that worked great on the 722 they had. I'm thinking about picking an AM21 up for them, as long as it's not missing the "big" sub-channels. Thanks in advance.