Horizontal Control
38
6.6
Roll
Roll causes the waveform to move slowly across the screen from right to left. It only operates on the time bases settings
of 50 ms/div and slower. If the current time base settings are faster than the 50 ms/div limit, it will be set to 50 ms/div
when Roll mode is entered.
To enable the Roll mode:
•
Press the
Roll
key.
–
Roll can also be enabled using the touch screen. Press the
Acquire
option located on the Menu Bar.
Then press
Roll
.
In Roll mode there is no trigger. The fixed reference point on the screen is the right edge of the screen and refers to
the current moment in time. Events that have occurred are scrolled to the left of the reference point. Since there is no
trigger, no pre-trigger information is available.
If you would like to pause the display in Roll mode press the
Single
key. To clear the display and restart an acquisition
in Roll mode, press the [Single] key again.
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.
