Create events from level trigger

Create events using a trigger sampled using the ascending or descending slope of an analog channel.

• Threshold. The value that must be reached in the signal to create an event.
• Min ISI (s). The minimum time interval between two triggers. This is to avoid creating more than one event for a single trigger.
• Direction. The direction of the analog trigger (detect an ascending or a descending slope).
• Channel. The label of the channel containing the analog trigger data.
• Event code. The event code label to assign to the events.