2-7
IM 701450-01E
2
Explanation of Functions
Time Axis Setting and Roll Mode Display
If T/div is set to a certain range (see appendix 1), the waveforms are displayed in roll
mode. In roll mode, the displayed waveform is not updated using triggers (update
mode). Rather, the oldest data is deleted as new data is acquired, and the waveform is
shifted from right to left on the screen. Roll mode display allows waveforms to be
observed in the same way as on a pen recorder. It is useful in observing low frequency
signals or signals that change slowly. It is also useful in detecting glitches (spikes in the
waveform) that occur intermittently.
* Roll mode display is also used when the trigger mode is set to single. However, the
displayed waveforms stop when a trigger is activated.
2.2 Vertical and Horizontal Axes
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