B&K Precision 2542B-GEN - Manual - Manual (Page 63)

Basic Operation
63
Roll - Horizontal Mode
Roll mode causes the waveform to move slowly across the
screen from right to left.
Note: It only operates on time base settings of 500
ms/div or slower. If the current time base setting
is faster than the 500 ms/div limit, it will be set to
500 ms/div when Roll mode is selected.
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 after a full screen of
acquisition in Roll mode, press the SINGLE key. To clear the
display and restart another full screen acquisition in Roll
mode, press the SINGLE key again.
Press the horizontal MENU key and then press the Roll
softkey to select the Roll mode. The waveform will move
slowly across the screen from right to left.
The fastest time base is 500 ms in roll mode.