Patent ID: 7657177

Claim:
A test receiver unit for receiving and testing a transmitted signal from a communications link, comprising an input for receiving the transmitted signal, a plurality of delay lines coupled in series to the input and arranged to receive an electrical signal from the input and to delay the electrical signal, at least two taps from the delay line(s), a register connected to the delay line(s) via the taps and arranged to hold a plurality of values corresponding with different delays of the electrical signal, and an output for deriving signals commensurate with said values, wherein the output is arranged to provide said signals commensurate with said values to a distortion analyser configured to determine the distortion in the electrical signal based on said signals commensurate with said values, and wherein the output of the signal distortion analyser provides undated equaliser coefficients to an equaliser configured to receive a plurality of tap outputs from the delay line(s) and configured to apply the equaliser coefficients to the delay line tap outputs to generate an equalised output signal.