H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/44
H04B 7/00 (2006.01) G01S 1/68 (2006.01)
Patent
CA 1263885
Emergency Locating Receiver System Abstract A receiver is provided for a distress incident locating telecommunications system. The receiver is a superheterodyne AM receiver which applies the received distress transmissions to a normally unlocked phaselock loop which locks onto the unmodulated carrier signal portion of the distress transmission. The duration of the phaselock loop being locked, and unlocked immediately after being locked, are measured and compared -to predetermined values to find a match. Each of the predeter- mined values corresponds to an item of information, and if a match is found, the receiver indicates it. The receiver is also capable of extracting audio information present in the distress transmission.
546782
National Aeronautics And Space Administration
Swabey Ogilvy Renault
Wren Paul E.
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