8–21
Qualified Triggers In the case of Qualified Triggers (Fig. 8–16), a signal’s transition
above or below a given level, the validation, serves as an
enabling, or qualifying, condition for a second signal that is the
source of the trigger.
Two Qualified Triggers are available: State-Qualified, where the
amplitude of the first signal must remain in the desired state
until the trigger occurs, and Edge-Qualified, for which the
validation is sufficient and no additional requirement is placed
on the first signal.
A Qualified Trigger can occur immediately after the validation or
within a set time after it. Or it can occur following a
predetermined time delay or number of potential trigger events.
The time delay or trigger count is restarted with every validation.
Figure 8–16. State- and Edge-Qualified Trigger Menus (see pages 8–35 and 8–36).
Qualified
By
Trigger on
After 1|2|3|4|Ext|Ext10|Pattern
1|2|3|4|Ext|Ext10
Edge|State qualifier
Has gone Above|Below|Value
Off|Time <| Time> (10 ns to
20 s)| Evs (1 to 99 999 999)
Wait
Qualified
By
Trigger on
Only after 1|2|3|4|Ext|Ext10|Pattern
1|2|3|4|Ext|Ext10
Edge|State qualifier
Goes and
stays
Above|Below|Value
Wait
Off|Time <| Time> (10 ns to
20 s)| Evs (1 to 99 999 999)
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