See also:

Tire designations
Federal law mandates that tire manufacturers place standardized information on the sidewall of all tires (see the illustration). The following information is listed on the tire sidewall: Th ...

Benefits of digital broadcasting
Better sound (FM sounds near CD quality and AM as analogue FM). Some FM frequencies offer a greater number of listening choices through “multicasting” (consisting of a frequency's main cha ...

Limitations
• Main channel vs. sub-channels (FM only): The main channel is the only channel that can receive in hybrid mode (both digital and analogue). If a frequency has subchannels, they are broadcast ...