Triggering; Trigger Setup Considerations; Trigger Modes; Trigger Types - LeCroy WaveMaster 8600A Operator's Manual

TRIGGERING

Trigger Setup Considerations

Trigger Modes

Auto mode causes the scope to sweep even without a trigger. An internal timer triggers the sweep
so that the display remains, even when the signal does not cause a trigger.
In Normal mode, the scope sweeps only if the input signal reaches the set trigger point. Otherwise
it continues to display the last acquired waveform.
In Single mode, only one sweep occurs each time you press the button.
Stop mode inhibits all sweeps until you select one of the other three modes.

Trigger Types

The triggers available to you are defined as follows:
A simple trigger, Edge trigger is activated by basic waveform features or conditions such
as positive or negative slope, and holdoff.
One of LeCroy's SMART Triggers®, Width trigger allows you to define a positive- or
negative-going pulse width bounded by a voltage level, above or below which a trigger
will occur. Or you can specify a pulse width and voltage range, within or outside of which
a trigger will occur.
Another of the SMART Triggers, Glitch trigger is a simpler form of Width trigger. Use
Glitch trigger when you want to define a fixed pulse-width time or time range only. Glitch
trigger makes no provision for voltage levels or ranges.
While Glitch trigger performs over the width of a pulse, Interval trigger performs over the
width of an interval the signal duration (the period) separating two consecutive edges of
the same polarity: positive to positive or negative to negative. Use interval trigger to
capture intervals that fall short of, or exceed, a given time limit. In addition, you can define
a width range to capture any interval that is itself inside or outside the specified range an
Exclusion trigger by interval.
The Qualify trigger is an edge-qualified SMART Trigger that allows you to use one
signal's positive or negative transition to qualify a second signal, which is the trigger
source. For Qualify trigger, you specify the time or number of events after the transition
when you want the trigger to occur.
The State trigger is a level-qualified SMART Trigger which requires that the qualifying
signal remain above or below a specified voltage level for a trigger to occur. For Sate
trigger, you specify the time or number of events after the signal has gone above or below
the voltage level when you want the trigger to occur.
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