The key features of these products are: 80SSPAR is the basic, lowest priced Iconnect product. It has three key features: S-Parameter Measurements True Impedance Profile (Z-Line) 50 ohm calibration 80SICON is the original Iconnect SW. It has all of the features found in 80SSPAR plus: Easily Analyze Source of Interconnect Jitter, Losses, Crosstalk, Reflections, and Ringing Efficiently Model PCBs, Flex boards, Connectors, Cables, Packages, and Sockets Analyze Interconnects Concurrently, in Time and Frequency Domains Perform Cost-Effective Eye Mask Test, Insertion, and Return Loss Specification Compliance Testing Obtain More Accurate Impedance Measurements Quickly Locate Interconnect Failures 80SICMX is the most extensive of these products. In addition to the features listed in 80SSPAR and 80SICON, it also offers the following: Automatically Convert TDR /T or VNA Data into SPICE Models Measurement Based, Frequency Dependent, Exact Models Model Passivity, Stability, Causality Guaranteed Easily Ensure System Level Simulation Accuracy Easily Perform Interconnect Link Analysis