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Scope Features and Functions
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Horizontal Mode Functions
The oscilloscope offers three types of horizontal mode functions — Main mode,
Roll mode, and XY mode.
Main Mode
Main mode displays the normal viewing mode for the waveform graph display.
The oscilloscope is always set to Main mode by default.
NOTE
Roll Mode
Roll mode causes the waveforms to move slowly across the oscilloscope's display
from right to left. It allows dynamic changes (like adjusting a potentiometer) on a
low frequency waveforms to be seen by the user. When the oscilloscope is in Roll
mode, the waveforms are not triggered and run continuously. Measurements can
be made while in roll mode.
The Roll mode only operates on time base of 500 ms/div and slower. If the current
time base setting is faster than the 500 ms/div limit, it will be set to 500 ms/div
when the Roll mode is entered.
Use Roll mode on low-frequency waveforms to yield a display much like a strip
chart recorder. It allows the waveform to roll across the display.
Keysight U2701A/U2702A User's Guide
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