Importance

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Abstract

Scanning of channels for a digital data signal that is received on one frequency of a group of frequencies in one of multiple channels is done by sequentially scanning frequencies in the group of frequencies such that each scan of a nonadjacent frequency is capable of detecting energy indicative of the digital data signal from the nonadjacent frequency and from frequencies that are adjacent thereto. In response to detecting energy indicative of the digital data signal in the nonadjacent frequency and frequencies that are adjacent thereto, the frequencies that are adjacent thereto may also be scanned to identify a frequency at which a carrier frequency is located. Sequential scanning may be accomplished by dividing a group of frequencies into a plurality of sets of frequencies at which the carrier frequency may be located. The frequencies of each set may then be interleaved with frequencies of other sets, and the frequencies of each set are sequentially scanned.

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First Claim