See also:

How HD broadcasting works
HD Radio works similarly to conventional radio and broadcasts of this type are available in many areas of the United States. However, there are a few key differences: Instead of transmitting one ...

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 i ...

Air distribution table
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