User Manual

Teledyne LeCroy
History Mode in WaveSurfer 3000 Oscilloscopes
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The top row of controls regulates scrolling, with the two outer buttons initiating a fast scroll and the two inner
buttons a slower scroll. On the bottom row, the outer buttons jump to the oldest and newest acquisitions, while the
inner two step through one at a time. Tapping the Index box allows for direct numeric entry of the desired history
item. Also note that the Relative Times checkbox in the History Table section of the dialog box toggles the table
between display of the absolute time of each acquisition and the relative time from the last acquisition.
Note that it is possible to save any displayed acquisition in History Mode by opening the File pull-down menu and
selecting Save Waveform. In addition, users may apply measurements or math operations to any selected History
Mode acquisition as shown in Figure 4.
Figure 4: Perform measurement and/or math operations on any acquired waveform in History Mode. In this
example, one of a group of single-shot acquisitions is measured for width, frequency, rise time (20-80%),
duty cycle, and overshoot.
Conclusion
The History Mode function in the WaveSurfer 3000 oscilloscopes provides a myriad of powerful analysis and
debug options. History Mode automatically saves all acquisitions and delivers convenient means of navigating
through a tabular list. Moreover, measurements and/or math operations may be performed on any historical
acquisition.