Enable roll mode
From the Horiz /Acq menu, select Roll Mode Auto, or click Roll Mode in the Acquisition tab of the Horizontal/Acquisition control
window.
Overview
Use these controls to turn Roll Mode on or off.
Roll mode lets you see acquired data without waiting for the acquisition of a complete waveform record. It gives you immediate
feedback. For slow time base settings, Roll mode provides a rolling display similar to a strip-chart recorder.
To use
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The resolution appears near the lower-right corner of the graticule and is controlled by the Resolution knob.
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Use Untriggered Roll Mode to continuously observe a slow process. Apply math and measurement operations after you stop
the acquisition.
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When Roll mode is on, the Acquisition Status Indicator Readout displays Roll.
Behavior
When using Roll mode, you do not have to wait for slow acquisitions to fill the display. When Roll mode is enabled, the
instrument displays newly acquired data points at the right edge of the display while moving the older waveform data points to the
left.
Using single sequence with roll mode causes the acquisition to automatically stop after a complete waveform record is acquired.
Roll mode is useful when observing a slow process where you always want to see the most recent view of that process. Roll
mode with single sequence is useful to save data for later viewing. For example, at 20 seconds per division and 30 K record
length, there are 12,000 seconds of acquired data points.
The maximum record length where Roll mode is allowed is 10 M.
What do you want to do next?
Learn how Roll mode interacts with other instrument settings.
Learn about Equivalent Time mode.
Horizontal and acquisition setups
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 193
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