tim's journal

Triggering

I decided on using the larger pre-built Keithley vi's. While they make life a bit simpler, they can sometimes have too many options. I'm stuck at the moment on the trigger configuration vi. The command in question is the direction: TCON:DIR SOUR or TCON:DIR ACC. I took a look at the triggering flowchart, but that only confused me more.

From the flowchart, it looks like the difference between SOUR and ACC is whether it waits for an external event. It seems like I should choose SOUR if I have no external triggering. But then why is ACCeptor the default?