A system and method are provided for conditioning a received signal prior to transmission. The signal is separated into different signal components in respective contiguous frequency channels. Each signal component is routed through either time domain or frequency domain processing circuitry and simultaneously a sample of the signal component is routed through control signal generation circuitry. The time domain processing circuitry contains a delay such that if any portion of the signal component exceeds a reference voltage signal, a switch is opened using a control signal generated by the control signal generation circuitry to blank that portion of the signal for that particular frequency channel. The outputs of each frequency channel are then combined into an output signal for transmission. A processor may be used to automatically configure various components within the time domain and frequency domain processing circuitry to prevent excessive power signals from being transmitted.