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Method for synchronization between systems

  • US 6,320,507 B1
  • Filed: 04/07/2000
  • Issued: 11/20/2001
  • Est. Priority Date: 04/07/2000
  • Status: Active Grant
First Claim
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1. A method for synchronizing the operation of a plurality of EAS systems, comprising:

  • receiving in said plurality of EAS systems an single RF synchronization signal from a remote source;

    detecting a time difference between said RF syncyronization signal and zero crossing of at least one of a power line current and voltage and storing said difference in a memory;

    in response to receiving said RF synchronization signal, transmitting in each of said EAS systems a synchronized exciter pulse for exciting a remotely located identification marker; and

    a predetermined time after transmitting said exciter pulse, enabling in each of said EAS systems a receiver for detecting a characteristic response of said indentification marker.

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