Networked electronic article surveillance systems with synchronized tracking

A system, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium comprising programming instructions that are configured to cause the processor to implement a method for operating an Electronic Article Surveillance (“EAS”) system, wherein the programming instructions comprise instructions to:
• receive a synchronization signal transmitted from a remote Wireless Device Manager (“WDM”);
• perform first transmit and receive operations that are synchronized in accordance with a zero crossing of an AC power line supplied to the remote WDM;
• detect when the synchronization signal is no longer being received by the system;
• determine a delta value between a first time at which the zero crossing of the AC power line supplied to the remote WDM occurred and a second time at which a zero crossing of an AC power line supplied to the electronic device occurred;
• converting the delta value into a delay value using a third time at which another zero crossing of the AC power line supplied to the electronic device occurs;
• and
• perform second transmit and receive operations that are synchronized in accordance with the delay value, when the synchronization signal has not been received by the system for a specified period of time.