By now you may know that digital TV stations can broadcast more than one signal. Depending on their configuration they can broadcast 2, 3, or 4 programs at the same time.
In Portland, Maine, the local ABC and NBC affiliates use one sub-channel for News and Weather. Nothing yet on CBS.
We also have a CW affiliate and a MyNetwork affiliate (WPXT and WPME respectively). WPXT, Channel 51 has reserved the right to broadcast RTN (Retro Television Network) on a sub-channel. They won't do so until they get a cable company to carry the channel as most viewers get their TV from cable, not by antenna. WPME, Channel 35, broadcasts special, locally-produced programming on a sub-channel called the "Maine Visitors Channel". If you use an antenna to pick up free digital/HD television, you can tune to 35.2 to view this channel. Primarily, it was produced for broadcast to Hotels and Motels in the Portland area so that visitors to Maine could find out about Events, Restaurants, and other points of interest in the area. The financial model works because the programming is essentially advertising for which businesses pay to get a piece produced and run on the network. Visitors see the many different mini-info-mercials which generate business. WPME doesn't need a cable or satellite company to broadcast this channel in order for WPME to make money. The target audience is staying in lodging facilities where the signal for channel 35.2 is beamed in.
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