A decision feedback equalizer has an inter symbol interference loop and inter chip interference loop. A user interface display system for use in ECG signal management includes a display generator for generating at least one display image enabling assignment of two measured ECG chest lead signals to any two signals of the six ECG chest lead signals of a conventional 12 lead ECG signal set. A convexity may be formed on the under face of the resin member, and a convexity is formed on the bottom of the resin case. Different levels of access to the computer may be provided by modifying the table through a password controlled security program. Gatelines are formed on the steps and along lower regions of the walls.