Patent ID: 7822380

Claim:
A method of operating a receiver system having both an RDS-TMC receiver and an FM modulator, comprising the following steps of: starting an operation of the receiver system; stopping an operation of the FM modulator while continuously operating the RDS-TMC receiver; examining whether an RDS-TMC ((Radio Data System-Traffic Message Channel) signal from a service provider is available at a current location; receiving the RDS-TMC signal and retrieving RDS-TMC data therefrom; sending the retrieved RDS-TMC data to an audio/video system; and starting the operation of the FM modulator while allowing to output an FM signal from the FM modulator at allowable frequency bands which are outside of a blocked range to send data to the audio/video system; wherein said blocked range is a frequency range determined based on a frequency band at which the RDS-TMC signal is transmitted in such a way that the frequency band for the FM signal from the FM modulator is sufficiently apart from the frequency band for the RDS-TMC signal, thereby avoiding any interference therebetween.