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As data link speeds increase, so do the problems that affect signal quality. A common tool for the SI engineer is circuit simulation. By modeling the channel virtually, engineers are able to predict waveforms, not only at the receiver, but also at each section of their modeled channel. This level of detail allows us to verify signal detection, as well as to determine the contribution of signal distortion of each section of the channel. To improve or to optimize our system, we identify the sections of channel that produce the greatest signal distortion and make intelligent changes. These changes can include geometric variations, elimination/addition of components or material selection.
