Trigger Input
For applications using a hardware acquisition trigger, anyone of the system I/O input ports can be selected as the source for the trigger control circuit of the acquisition channel.
For that usage, use the parameters belonging to the Trigger Control category.
The trigger source signal can originate from the following type of devices:
- Through a single high-speed differential input port driven by an RS-422 compatible detector.
- Through a single isolated current-sense input port driven by a detector that is not RS-422 compliant.
The selection of the port is primarily based on the electrical style of the sensor device used as trigger source.
Possible ports assignments
Sourcing device type |
Default port(s) assignment |
Alternate port assignment(s) |
RS-422 compatible detector |
High-speed diff. input #2 |
High-speed diff. input #1 |
Other detectors |
Isolated input #2 |
Isolated input #1 |
The default port assignment for both electrical styles is different than the one of the line trigger (at least when a single signal is used).