LeCroy DDA 7 Zi series, Operator'S Manual

Page: 245 / 544

Operator's Manual
WP700Zi-OM-E-RevA
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Click the keypad button on the slider bar to enter values using the pop-up keypads. Touch the
Default button to use preset values.
OR
Touch the Out Of Range button and perform the same range setups as for In Range triggering.
Note : Use the TriggerScan tab to run the Trainer (a wizard-like tool to configure triggers), Save , and Load
trigger setups for reuse.
Qualified Trigger
How Qualified Triggers Work
Use a signals transition above or below a given level (its validation) as an enabling (qualifying) condition for a
second signal that is the trigger source. These are Qualified triggers. For Edge Qualified triggers (the default), the
transition is sufficient and no additional requirement is placed on the first signal. For State Qualified triggers the
amplitude of the first signal must remain in the desired state until the trigger occurs. A qualified trigger can occur
immediately after the validation, or following a predetermined time delay or number of potential trigger events.
The time delay or trigger count is restarted with every validation.
Within Time creates a time window within which a trigger can occur.
Wait Time determines a delay from the start of the desired pattern. After the delay (timeout) and while the
pattern is present, a trigger can occur. The timing for the delay is restarted when the selected pattern begins.
Events determines a minimum number of events of the trigger source. An event is generated when a
trigger source meets its trigger conditions. On the selected event of the trigger source and while the pattern is
present, a trigger can occur. The count is initialized and started whenever the selected pattern begins, and
continues while the pattern remains. When the selected count is reached, the trigger occurs.
Figure 4-16. Edge Qualified and Wait: Trigger after timeout. The broken upward-pointing arrows indicate
potential triggers, while the bold ones show where the actual triggers occur.