HD Radio technology works pretty much just like traditional analog radio transmission:
1. The radio station sends out the analog and digital radio signals, along with a third signal
for text data.
2. The digital signal is compressed before being transmitted.
3. The three-layered signal is transmitted from the radio station's upgraded digital
transmitter.
4. Multipath interference, caused by the signal reflecting off of buildings, is ignored by
the digital radio, which is able to discern the true signal and ignore interference.
5. Your radio receives the signal and, depending on your equipment, you hear either the
digital or analog feed. When the digital signal is received, you can tune between HD1 or HD2
(95-7 THE ROCK or the ALL COMEDY RADIO NETWORK)