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Chapter 7 Timing simulation Note You can alter the font and color selections for the output display by choosing Preferences from the Options menu, and changing the settings for Compare Tool in the Fonts and Colors tabs. Times displayed in the lower pane are generated by the signals in File 1. Double-clicking on one of these lines displays a window with supplementary information about the line, such as the offset or the strobe time for the other file (if different strobe times were used for each file). Also, errors caused by signals changing after the strobe time and those caught by the Pre-Strobe Glitch Check will display the message, “Unexpected output event.” Note Normally, lines are shown in order by increasing time. But, in the case of unexpected output changes, Simulate lists all of the changes from File 1 before all of the changes in File 2. In this case, lines could be out of time sequence. However, Simulate identifies each line by time, color, and the “<” or “>” marker. Double-clicking on an output line in the lower pane displays supplemental information. 172 If the two data sets being compared have no differences, Simulate displays a message asking if you want to proceed or terminate the comparison.