722K does not come with OTA module, it is sold seperately now for about $40 in my area. Your 622 should have the OTA module built in. Just connect your antenna to your receiver, go into the menu (menu-6) there should be an option here to search for local channels. This will add them to your guide where they will be visible on both TV's. Ofcourse in this way, you will not be receiving an HD picture on tv2. You would need the antenna cable running directly to tv2 via a splitter.