Patent ID: 6978126

Claim:
A transmitter for transmitting a device activation signal or other data, for remotely actuating a device, the device activation signal having an RF carrier frequency and a power level, said transmitter comprising: a controller operable in an operating mode for providing a tune level signal that identifies the RF carrier frequency of the device activation signal; a signal generator circuit coupled to the controller for generating the device activation signal, such that the RF carrier frequency corresponding to the controller tune level signal is generated; a transmission antenna assembly coupled to the signal generator circuit and the controller, the transmitter antenna assembly operable for transmitting the device activation signal; and a detector circuit for detecting the power level of the device activation signal, the detector circuit providing the detected power level to the controller; wherein the controller is further operable for tuning the transmission antenna assembly based on the detected power level including tuning the transmission antenna assembly before applying a modulation scheme such that the power level of the device activation signal is controlled and tuning the transmission antenna assembly over a limited tuning range while applying the modulation scheme.