Cable TV tuners and over-the-air TV tuners use different approaches with channel numbers. Cable TV uses a whole number for a channel number. Over-the-air TV uses a two part channel number consisting of pair of whole numbers: a major number (such as 13) and a minor number (such as 1, 2, 3). The major and minor channel numbers are usually written separated by a '.' or '-' character (such as 13.2).2--A minor question, not as important as getting WNET back:
My friend who has cable TV asked me how I can get 3 stations on 13.1, 13.2, 13.3, or 21.1, 21.2, 21.3, and I have no explanation for her. I set the remote to 21, for example, then click the channel button UP, and I get 3 different programs. I'm mystified, although I've had it since signals went digital. WLIW comes from Long Island, not 4 different places.
Years ago, when the FCC prohibited cable TV systems from encrypting the channels of the lowest level service tier, the same physical signal present on a cable TV feed could be tuned to by different numbers with a cable TV box and a TV tuner (when the TV tuner had the capability of demodulating the cable TV feed) . A cable TV box might use 33 while the TV tuner might use 13.2 for the same channel.