Multi-frequency security code transmission and reception

Details Multi-frequency security code transmission and reception Multi-frequency security code transmission and reception

G - Physics

08

C

G08C 17/02 (2006.01)

Patent

CA 2527490

A system is disclosed including a transmitter and receiver for the communication of security codes which may be validated at the receiver to operate equipment. In one embodiment, the transmitter transmits a security code at two frequencies contemporaneously to the receiver which may receive both frequencies and resolve the security code therefrom. The receiver may lock onto one frequency when parts of a security code are detected to the exclusion of the other frequency. In another embodiment, the transmitter selectively transmits security codes at a default frequency which is selected because of a recorded count of prior apparent successful transmission.

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