Method and apparatus for detecting a radio frequency to...

Details Method and apparatus for detecting a radio frequency to... Method and apparatus for detecting a radio frequency to...

2007-11-27

2007-11-27

Gelin, Jean A (Department: 2617)

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

C455S003060

Reexamination Certificate

active

10687410

ABSTRACT:
A method and apparatus is disclosed for detecting the frequency to which a broadcast receiver is tuned. In one embodiment, a sensing unit emits a chirp signal over a range of broadcast bands and monitors the output of the radio receiver to detect the frequency to which the radio receiver is tuned. In another embodiment, a sensing unit demodulates radio signals across a range of frequencies and compares the demodulated signals to observed audio output of the radio receiver.

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HighPoint Systems, Inc., http://www.highpoint.com.
Acey, “Safeway Tests PalmPilot” http://www.nytimes.com/techweb/TWSafewayilot.html.

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