Patent ID: 7751470

Claim:
A method of time correlating signal power to distortion characteristics for a digital signal having multiple sub-bands comprising the steps of: acquiring time domain data representing the digital signal within a frequency band; simultaneously converting time slices of the time domain data to frequency and demodulation domain data; processing the frequency domain data to obtain frequency domain measurements for each time slice; processing the demodulation domain data to obtain demodulation domain measurements for each time slice; and simultaneously displaying the frequency and demodulation domain measurements as a function of time; wherein the simultaneously displaying step comprises the steps of: displaying a first panel within a screen of a display device representing the frequency domain measurements as a function of time based on the time domain data, the first panel having a time axis and a frequency axis with the frequency domain measurements being displayed as frequency sub-band measurements representing a main sub-band from the multiple sub-bands and adjacent side sub-bands, so that the first panel has a series of bars representing the time slices which are divided by the sub-bands, the bars having an indicia for each sub-band representative of the frequency domain measurement for that sub-band and time slice; and displaying a second panel within the screen representing the demodulation domain measurements as a function of time based on the time domain data, the second panel having a time axis corresponding to the time axis of the first panel and having the demodulation domain measurements along a measurement axis so that the frequency and demodulation domain measurements are displayed in time correlation.