A communications device comprising: a clock signal generator configured to generate a clock signal having a clock frequency; a receiver coupled to the clock signal generator; a processor; and a spectrum spreader comprising: a signal conductor configured to receive the clock signal having the clock frequency; and a tunable filter coupled to the signal conductor, wherein the tunable filter is configured to spread a frequency of the clock signal responsive to a control signal to provide a spread spectrum clock signal to the processor, wherein a frequency of the spread spectrum clock signal is spread relative to the clock frequency, wherein the tunable filter comprises an inductor-capacitor "LC" band pass filter, the communications device being characterized in that it further comprises: a control signal generator coupled to a control node between a capacitor and a varactor diode of the tunable filter, wherein the control signal generator is configured to generate the control signal that is applied to the control node and further configured to adapt one or more characteristics of the control signal responsive to changes in levels of interference at the receiver, the receiver being configured to receive communications over an air interface using the clock signal having the clock signal frequency without spreading directly from the clock signal generator, the changes being received over a feedback loop from the receiver. a clock signal generator configured to generate a clock signal having a clock frequency; a receiver coupled to the clock signal generator; a processor; and a spectrum spreader comprising: a signal conductor configured to receive the clock signal having the clock frequency; and a tunable filter coupled to the signal conductor, wherein the tunable filter is configured to spread a frequency of the clock signal responsive to a control signal to provide a spread spectrum clock signal to the processor, wherein a frequency of the spread spectrum clock signal is spread relative to the clock frequency, wherein the tunable filter comprises an inductor-capacitor "LC" band pass filter, the communications device being characterized in that it further comprises: a control signal generator coupled to a control node between a capacitor and a varactor diode of the tunable filter, wherein the control signal generator is configured to generate the control signal that is applied to the control node and further configured to adapt one or more characteristics of the control signal responsive to changes in levels of interference at the receiver, the receiver being configured to receive communications over an air interface using the clock signal having the clock signal frequency without spreading directly from the clock signal generator, the changes being received over a feedback loop from the receiver. a signal conductor configured to receive the clock signal having the clock frequency; and a tunable filter coupled to the signal conductor, wherein the tunable filter is configured to spread a frequency of the clock signal responsive to a control signal to provide a spread spectrum clock signal to the processor, wherein a frequency of the spread spectrum clock signal is spread relative to the clock frequency, wherein the tunable filter comprises an inductor-capacitor "LC" band pass filter, the communications device being characterized in that it further comprises: a control signal generator coupled to a control node between a capacitor and a varactor diode of the tunable filter, wherein the control signal generator is configured to generate the control signal that is applied to the control node and further configured to adapt one or more characteristics of the control signal responsive to changes in levels of interference at the receiver, the receiver being configured to receive communications over an air interface using the clock signal having the clock signal frequency without spreading directly from the clock signal generator, the changes being received over a feedback loop from the receiver. a control signal generator coupled to a control node between a capacitor and a varactor diode of the tunable filter, wherein the control signal generator is configured to generate the control signal that is applied to the control node and further configured to adapt one or more characteristics of the control signal responsive to changes in levels of interference at the receiver, the receiver being configured to receive communications over an air interface using the clock signal having the clock signal frequency without spreading directly from the clock signal generator, the changes being received over a feedback loop from the receiver.