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Chapter 3 To Set the Horizontal System RIGOL
MSO2000A/DS2000A User’s Guide 3-7
Roll Mode
In this mode, the waveform scrolls from the right to the left to update the display.
The range of horizontal scale adjustment is from 200.0 ms/div to 1.000 ks/ div.
Note: When Roll mode is enabled, the waveform “horizontal position”, “Delayed
Sweep”, “Protocol Decoding”, “Pass/ Fail Test”, “Measurement Range”,
“Waveform Record”, “To Set the Persistence Time” and “To Trigger the
Oscilloscope” are not available.
Slow Sweep
Slow sweep is another mode similar to Roll mode. In Y-T mode, when the horizontal
time base is set to 200 ms or slower, the instrument enters “slow sweep” mode in
which the instrument first acquires the data at the left of the trigger point and then
waits for trigger event. After the trigger occurs, the instrument continues to finish
the waveform at the right of the trigger point. When slow sweep mode is used to
observe low frequency signal, it is recommended that the “Channel Coupling” is
set to “DC”.
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