Hold Off By Events; Simple Triggers; Edge Trigger On Simple Signals; Control Edge Triggering - LeCroy WaveRunner Xi series Operator's Manual

O ' M
PERATOR S ANUAL

Hold Off by Events

Select a positive or negative slope and a number of events. An event is the number of times the trigger condition
is met after the last trigger. A trigger is generated when the condition is met after this number, counted from the
last trigger. The count is restarted on each trigger. For example, if the event number is two, the trigger will occur
on the third event. From one to 99,999,999 events can be selected.
Edge Trigger with Holdoff by Events (in this example, two events). The bold edges on the trigger source indicate that a positive
slope has been selected. The broken, upward-pointing arrows indicate potential triggers, while the bold ones show where triggers
actually occur after the holdoff expires.

Simple Triggers

Edge Trigger on Simple Signals

The instrument uses many waveform capture techniques that trigger on features and conditions that you define.
These triggers fall into two major categories:
1. Edge - activated by basic waveform features or conditions such as a positive or negative slope, and hold-off
2. SMART Trigger - sophisticated triggers that enable you to use basic or complex conditions for triggering.
Use Edge Triggers for simple signals, and the SMART Triggers for signals with rare features, like glitches.

Control Edge Triggering

Horizontal: Turn the Delay knob in the HORIZONTAL control group to adjust the trigger's horizontal position. Or,
touch inside the Delay field in the timebase setup dialog and enter a value, using the pop-up keypad.
The trigger location is shown by a marker below the grid:
Post-trigger delay is indicated by a left-pointing arrow below-left of the grid:
The time value is given in the title line of the TimeBase label (lower-right of the grid):
Vertical: Turn the L
EVEL knob in the TRIGGER control group to adjust the trigger's vertical threshold.
Turn this knob to adjust the level of the trigger source or the highlighted trace. Level defines the source voltage at
which the trigger will generate an event a change in the input signal that satisfies the trigger conditions.
61
WRXi-OM-E Rev C