System and method for controlling control unit drive frequency

In an electronic system having a radio tunable to receive a selected one of a plurality of radio frequency signals and to an electronic control unit (ECU) which emits a control signal having a control frequency having radio frequency noise harmonics, the system comprising:

• a communication link communicating a tuned frequency message from the radio to the ECU, the tuned frequency message communicating to the ECU the selected radio frequency to which the radio is tuned;
• and
• a frequency controller for varying said control frequency, the frequency controller receiving the tuned frequency message and varying the control frequency as a function of the tuned frequency so that the radio frequency noise harmonics do not significantly interfere with the tuned frequency of the radio, the frequency controller varying the control frequency as a function of the tuned frequency message, a bandwidth associated with the selected radio frequency, and a bandwidth associated with the radio frequency noise harmonics, and the frequency controller causes the control frequency to be a function of the selected radio frequency and an odd number integer.

In an electronic system having a radio tunable to receive a selected one of a plurality of radio frequency signals and to an electronic control unit (ECU) which emits a control signal having a control frequency having radio frequency noise harmonics, a method of controlling noise, comprising:

• communicating a tuned frequency message from the radio to the ECU, the tuned frequency message communicating to the ECU the selected radio frequency to which the radio is tuned;
• and
• varying said control frequency as a function of the tuned frequency so that the radio frequency noise harmonics do not significantly interfere with the tuned frequency of the radio.