Patent ID: 7483477

Claim:
In a logic analysis system receiving digital signals with channels each having respective data receivers operated in at least one signal set having at least two channels and their data receivers therein and wherein each signal set shares in common a constrained sampling parameter value while each data receiver in a signal set also has an independently variable unconstrained sampling parameter, a Graphical User Interface for selecting the constrained sampling parameter value for a signal set and also unconstrained sampling parameter values for the channels in the signal set, the Graphical User Interface comprising: (a) a first screen where channels to be used in a measurement and sharing a constrained sampling parameter are associated with a signal set and one or more channels are declared as belonging to one or more groups; (b) a second screen including an eye diagram measurement control that causes the measurement of eye diagrams of channels belonging to groups, wherein the second screen also includes for each group a group expansion control that expands a respective composite eye diagram for an associated group into a plurality of component eye diagrams for the channels belonging to the group and each component eye diagram contains a cursor indicating recommended sampling parameter values; and (c) subsequent to a use of the eye diagram measurement control, the second screen also including composite eye diagrams for each group and including cursors positioned thereon indicating recommended sampling parameters for each channel in the group.