| 摘要 |
Self-aligning a transmitting RF frequency between a portable transceiving device and a base station transceiving device, wherein the base station transceiving device is mounted in a vehicle for controlling a vehicle accessory function in response to RF messages broadcast between the transceiving devices is performed when the RF signal is transmitted (32) from one of the portable or base station transceiving devices to the other of the portable or base station transceiving devices. The frequency of the RF signal is varied (33) during the transmission. A RSSI value of a received RF signal is measured (34) at selected frequencies. A respective frequency having a maximum RSSI value is determined (35). At least a portion of a subsequent RF message is transmitted (38) from one of the portable transceiving device or base station transceiving device using the respective frequency. The RF signal may be transmitted in response to an interrogation or activation signal (31). The portable transceiving device may be a key fob for remote keyless entry (RKE) or a tyre pressure sensor. |
