All my Samsung TVs allow entering in the RF channel on the remote to program in a station that's not in it's memory, but why they lack a manual scan or add-on option in the settings is beyond me. However, this further complicates things when 2 different stations share the same RF and virtual number, especially after the repack, where a manual tune or add-on option would have been nice. Running auto scan will remove any station that's not currently being received, and if its RF is shared with a virtual of another station that has already been programmed in, it won't work.