Multichannel radio telephone system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 28, 1981
Grant Date -
N/A
app pub date -
Dec 3, 1979
filing date -
Dec 3, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Phantom signals resulting from intermodulation between a busy channel and an idle channel with idle tone cause scanning radio stations to lock on a phantom idle channel and miss communications. Locking on a phantom idle channel is prevented by transmitting a busy tone on each channel having communication so that any phantom signals resulting from intermodulation will include busy tone. A scanning station is arranged to lock on a channel with only idle tone, and not lock on any channel (real or phantom) with busy tone.
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Family
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Cited Art Landscape
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