G - Physics – 08 – B
Patent
G - Physics
08
B
343/17, 340/124.
G08B 13/24 (2006.01)
Patent
CA 1260106
ABSTRACT OF THE DISCLOSURE Operation of similar electronic article surveillance (EAS) systems in proximity to each other may result in false alarms or system "shut-downs" as a result of signals transmitted from one system being detected in the receiver circuits of the other systems. This may especially occur with EAS systems in which the receivers are only activated during quiescent intervals between transmitted bursts, such that if the systems are unsynchronized, the transmitted bursts of the one system may occur during the quiescent intervals of the other system. In the present invention, synchronization is effected by responding to RF detected during the quiescent intervals and preventing the transmitted bursts from occurring during the quiescent intervals of the other system.
519493
Fergen James E.
Nourse Gary E.
Zarembo Peter J.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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