Abstract: A system is disclosed for manipulating buses and signals on a display window of a graphical user interface of a logic analyzer. Each signal is associated on the display with representations of its sampled data, which may be in the form of lists or of waveforms. The system enables a user to graphically associate the buses and signals. Also, the buses and signals may be visually associated on the display window with user-specified trigger-conditions. The User may graphically associate the signals into buses by selecting the signals then grouping them by selecting a group command. Responsive to this grouping, the system may generate a bus representing the grouped signals. The bus may be graphically associated with the grouped signal-name elements, such as, for example, by a hierarchical structure. The system, responsive to the grouping by the user of the signals into buses, generates bus-data elements representing signal data associated with the grouped signals.

Abstract: A system is disclosed for enabling a user to specify a trigger condition of a signal or bus by enabling the user to graphically select the signal or bus from a hierarchically arranged list of signal or bus names. The user may make this selection from a graphical user interface of a signal measurement system. The user also graphically selects the signal trigger condition. A trigger-specification element identifying the trigger condition is visually associated with a displayed name of the first signal or bus. The user may select the signal trigger condition of the first signal or bus by selecting the first trigger-specification element. The signal measurement system may be a logic analyzer. The hierarchically arranged list may be vertically aligned and each signal or bus name may be visually associated with one of a first group of trigger-specification elements by horizontal alignment.

Abstract: A system is disclosed for enabling a user to specify one or more trigger conditions by graphically creating a pictorial representation of the trigger conditions. The pictorial representation is presented on a display window of a graphical user interface of a logic analyzer and is accomplished using trigger-condition icons. Each icon represents a trigger condition of a signal or bus. The user specifies the trigger conditions by positioning the trigger-condition icons on the display window. The user does this by selecting, dragging, and dropping the trigger-condition icons onto the display window. The display window may include one or more name elements, each associated with a signal or a bus. The user may specify the trigger condition of a first signal or bus by selecting a trigger-condition icon and positioning it at a first position on the display window in horizontal alignment with the name element of the first signal or bus.