Patent ID: 6842608

Claim:
A response calibration scheme, comprising: a source providing a stimulus signal having a non-zero bandwidth and an adjustable spectral position; a signal path having an input coupled to the source, introducing a distortion to the stimulus signal between the input and an output; a receiver coupled to the output of the signal path, acquiring a first digital representation of the stimulus signal at the output of the signal path with the stimulus signal adjusted to a first spectral position, and acquiring a second digital representation of the stimulus signal at the output of the signal path with the stimulus signal adjusted to a second spectral position shifted from the first spectral position by a predetermined frequency offset; a processor, designating the distortion introduced to the stimulus signal by the signal path to be equivalent when the stimulus signal is adjusted to the first spectral position and when the stimulus signal is adjusted to the second spectral position, extracting a first combined frequency response of the receiver and the signal path at at least three predesignated frequencies within the bandwidth of the stimulus signal, extracting a second combined frequency response of the receiver and the signal path at the at least three predesignated frequencies within the bandwidth of the stimulus signal, and determining a response of the receiver from the first combined frequency response and the second combined frequency response.