Abstract: A digital receiver is provided. The digital receiver includes an oscillator that generates an oscillating signal at a selected frequency, and a complex mixer, coupled to the oscillator and configured to receive samples of a wideband signal from a digital interface. The complex mixer moves a signal of interest in the wideband signal to baseband. The digital receiver also includes at least one filter, coupled to the complex mixer, that down-samples the baseband signal to a narrowband signal and an output, coupled to the at least one filter, that is adapted to output the narrowband signal for analysis.