I am trying to hook up an antenna to my Samsung 4k HD Smart TV.  When I go to the Source menu, there is no source for the antenna.  If I click on the TV option, it brings me to TV Plus instead of prompting me to scan for over the air channels.  Also, when I go to Settings and then Broadcast, the Broadcast option is greyed out.  My TV is connected to the Internet.  I checked for updates and there were none.  Any help in this matter is greatly appreciated!  Thanks!