User`s guide

4 External Mode
4-14
If you have selected a trigger, the Trigger signal panel activates.
By default, any element of the first input port of the specified block can cause
the trigger to fire (i.e., Port 1, any element). You can modify this behavior by
adjusting the
Port and Element fieldslocatedontherightsideoftheTrigger
panel. The
Port field accepts a number or the keyword last.TheElement field
accepts a number or the keywords
any and last.
These are the options that you can specify under the Trigger signal panel:
• Direction — rising, falling, or either. This specifies the triggering event.
• Level — specifies a bias in the trigger signal. By default, the level is 0.
Setting the level to 1, for example, directs the trigger to fire once the signal
has crossed 1 in the specified direction.
• Hold-off — only applies to normal mode. Expressed in base rate steps,
hold-off is the time between the termination of one trigger event and the
rearming of the trigger.
The Trigger signal panel