Clear channel selection system for a cordless telephone
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United States of America Patent
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-
Mar 21, 2000
Issued Date -
N/A
app pub date -
Mar 10, 1997
filing date -
Jan 5, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A radio frequency (RF) signal transmitter/receiver system comprises a pair of transmitter/receiver units. A microcomputer-based RF carrier detect system determines when an RF signal is present or absent. The RF carrier detect system is also responsive to noise interference signals at or near its currently-tuned receiving channel. In periods of inactivity, the RF signal receiver monitors its currently-tuned channel and upon detection of noise interference or upon a determination that the currently-tuned channel is occupied, initiates a fast scan operation to identify an unoccupied and relatively interference-free channel, and transmits a command to its paired transmitter/receiver unit causing it to tune to the newly-identified unoccupied channel.
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