Patent ID: 7711348

Claim:
An RF radio configured to detect broadcast warning alert data, comprising: a tuner configured for receiving broadcast radio wave signals on radio wave signal channels, said broadcast radio wave signals including a first radio frequency band and a second radio frequency band outside of the first frequency band and said tuner being adapted to be selectively tuned to at least one of the first radio frequency band and the second radio frequency band, and said first radio frequency band spanning from a first frequency to a second frequency, and the second frequency band including at least one channel adapted to include at least one AFSK synthesized tone; and a memory including an alternate frequency (AF) update routine being adapted to periodically monitor for warning alert data being broadcast in the second frequency band while the tuner is selectively tuned to at least one of the first and the second radio frequency band, said monitored warning alert data having a correlation of quality of the broadcast radio wave signal to at least one AFSK synthesized tone in the at least one channel in the second frequency band, and the correlation being detected by the AF update routine; wherein the radio is adapted to switch the tuner between a radio wave signal channel on the at least one of the first and the second radio frequency band to the second frequency band during operation of the AF update routine to allow the AF update routine to detect presence of the warning alert data being broadcast in the second radio frequency band.