Teledyne LeCroy WaveSurfer MXs-B Getting Started Manual - Manual (Page 40)

WaveSurfer MXs-B Oscilloscopes
32 922172-00 Rev A
5. Select a trigger Slope from the Slope section:

Positive and Negative slope refers to the voltage change direction for
triggering.

Window defines a region whose boundaries extend above and below
the selected trigger level. A trigger event occurs when the signal
leaves this window region in either direction and passes into the
upper or lower region (as follows). The next trigger occurs when the
signal passes into the window region.

Either – Use this selection to trigger when positive or negative
voltage change directions occur.
Explanation of Window trigger operation
Trigger Holdoff
Holdoff is an optional, additional condition of Edge trigger. It can be set
either as a period of time or as an event count. Holdoff disables the trigger
circuit for a given period of time or events after the last trigger occurred.
Events are the number of occasions on which the trigger condition is met.
The trigger occurs again when the holdoff elapses and the edge trigger’s
other conditions (for level, slope, etc.) are met.
Use holdoff to obtain a stable trigger on complex, but repetitive,
waveforms. For example, if there is a signal with multiple edges prior to the
edge you wish to trigger on, you could set the holdoff to equal the number
of edges preceding the desired triggering edge.
Refer to the Online Help for more information about holdoff setup.