Data Sheet

RIGOL 3 To Set the Horizontal System
MSO4000/DS4000 User’s Guide
3-8
Roll Mode
In this mode, the waveform scrolls from the right to the left, much like a strip chart.
This is useful for viewing slower signals as the signal is “drawn out” on the display as
time elapses. The waveform horizontal position and trigger controls are not available.
The range of horizontal scale adjustment is from 200.0 ms to 50.00 s.
Note: When the Roll mode is enabled, “
Delayed Sweep”, “Protocol Decoding”,
“
Pass/Fail Test”, “Measurement Range”, “Waveform Record”, “To Set the
Persistence Time”, “To Trigger the Oscilloscope” and “Logic Analyzer” are
not available.
Slow Sweep
Another mode similar to the Roll mode. W
hen the horizontal time base is set to 200
ms/div or slower, the instrument enters “slow sweep” mode in which the instrument
first acquires the data to 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 the slow sweep mode is used to observe low
frequency signal, it is recommended that the
Channel Coupling is set to “DC”.