A:Answer Because of the way that modern digital TV works, one cannot add channels manually. This is because in the analogue world, each channel represented a specific frequency, while in modern digital TV, the transmission frequency is independent of the channel. The “channel” is assigned by the FCC, and encoded in the signal. When the tuner finds the signal, it decodes the assigned virtual channel, then matches it in the TV. To manually add a “channel”, one needs to know the frequency, not the assigned virtual channel number.
One typically can search all available “channels” (frequencies) then delete the ones which one does not desire, but one cannot add the channels which the tuner did not sense, (or that the tuner had decided was not strong enough). This system sucks, as that means that if there are stations available only when one's antenna is oriented one way, and other channels available only when oriented another way, one can only see one set of channels or the other, as every time the antenna is re-oriented, the channels have to be re-discovered (through searching).
