State Trigger - LeCroy SDA Operator's Manual

4. Touch inside the After data entry field and select the qualifying signal source from the pop-up
menu. If you select an input channel or external source, touch inside the has gone data entry
field and select a logic level: Above or Below. Then touch inside the Level field and set a
voltage level using the pop-up numeric keypad. If you select Pattern from the pop-up menu,
touch the Pattern tab and choose a logic gate. Then touch inside the State field for each
channel input you want to use in the pattern and select a logic condition: High or Low. Select
Don't Care for unused inputs. For the inputs to be used, touch inside each Level field and
enter a voltage threshold using the pop-up numeric keypad. Then touch the Trigger tab
again.
5. If you want to set a holdoff in time or events, touch one of the Qualify by: buttons:
6. Touch inside the field below the Qualify by: buttons and enter a value using the numeric
keypad.
7. To set up a Qualified First trigger, touch the Qualify first segment only checkbox if you are
in Sequence mode.

State Trigger

State trigger is another Qualified trigger; however, instead of using the edges of the qualifying
inputs, State trigger uses the logic state of the inputs to qualify the trigger. Therefore, the pattern
must become true and remain true (for a period of time or number of events that you specify) to
qualify the trigger.
See also the How Qualified Triggers Work topic (previous).
State Qualified and Wait: Trigger after timeout. The broken upward-pointing arrows indicate potential triggers,
SDA-OM-E Rev H
while the bold arrows show where the actual triggers occur.
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