There are simple electronic boxes the allow reception of over the air channels the can be recorded on a hard disk or SSD for later viewing. All that I know of require a coax or HDMI connection to the TV. Several have radio frequency remotes. You would need a box for each TV to watch separate channels simultaneously. To get signals from you house to the smart TV in your house you need a router and some cases an extender. The problem is how do you get signals from the cable TV box to the router. The easiest thing is to subscribe to DirecTV now or Hulu and watch what you want through your cellphone.
I use DirecTV and the genies have wireless capability to broadcast 5/7 channels of live TV plus 3 recorded channels simultaneously over a wireless link (video bridge and client). The genies also have WIFI receive capability, so it works with dumb TVs and monitors. Each client has it own remote and the client transmits the viewers request over the wireless link to the genie. The operation is not immediate but typical takes a second or so. Although the MC has it own dish, when the coach is parked in the drive way we watch the house's genie. Dish has a similar system.
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Jim & Roy Davis
2016 Hurricane 31S
1961 Rampside in tow
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