Method and apparatus for identifying signaling channel

Details Method and apparatus for identifying signaling channel Method and apparatus for identifying signaling channel

H - Electricity

04

B

H04B 1/18 (2006.01) H03J 1/00 (2006.01) H03J 3/08 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2164522

A receiver (100) has a channel scan mode of operation and a communication mode of operation. In the channel mode of operation, the passband of a filter (145, 144) is narrowed relative to the passband of the filter in the communication mode. According to another aspect of the circuit, a local oscillator (112, 142, 157) is selectively phase locked to an internal clock (137) during channel scanning and locked to the incoming signal during a communication mode operation.

Un récepteur (100) fonctionne selon un mode d'exploration de voie et un mode de communication. En mode voie, la bande passante d'un filtre (145, 144) est resserrée par rapport à la bande passante du filtre en mode de communication. Selon un autre aspect du circuit, un oscillateur local (112, 142, 157) est verrouillé en phase sélectivement sur une horloge interne (137) pendant l'exploration de voie, et verrouillé sur le signal entrant pendant le fonctionnement en mode de communication.

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