Neurotechnology Research Systems
© Plexon Inc
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6.8
Trigger Mode
The trigger mode determines how stimulation is initiated. The three trigger modes, Software,
Rising, and Level are described below. In all cases, the stimulation pattern for the channel must be
defined and loaded before it can be triggered.
6.8.1
Software Trigger Mode
In Software mode, stimulation is initiated by clicking on the Start or Start All buttons in the GUI.
Each time Start or Start All is pressed, the stimulation pattern for the channel is initiated.
6.8.2
Rising Edge Trigger Mode
In the Rising trigger mode, stimulation begins when the digital input for the channel transitions
from low (~0V) to high (~5V). The latency from digital input to stimulation onset is less than 1 µs.
In the example above, the stimulation pattern consists of two repetitions of a 3 pulse burst
arbitrary waveform. The stimulation pattern is initiated by the rising edge in the digital input
marked 1. Once the stimulation pattern is triggered it will play to completion even if the digital
input goes low during the stimulation. If another rising edge occurs during the stimulation pattern
it is ignored (e.g. the rising edge marked 2 is ignored).
Waveform #1 Waveform #2
Complete pattern
Rate
1
2
3
