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I believe the station shown is not Part 15, but Amateur TV … you need an a Amateur License, can’t be used commercially, can’t advertise … don’t know about educational stuff … maybe a a variance?
Part 15 would be the short range microwave wireless units you would use for watching TV in other rooms not hooked up via cable. The trip into this would be to see how far you can go legally. I believe if you want an audience outside, you’d have to provide a down-conveter or separate microwave receiver for each TV receiver.