Tek 7104 Triggering problem

[detech]

I try to use Tek 7104 scope controlled by Labview. I got its driver from NI.com and an example with edge triggerring. However, when I use it, the trigger level does not work. Whatever I changed trigger level, the scope triggered. I am wondering why and how to resolve it? Thanks

The labview driver of Tektronix DPO7104 can be found from NI.com. Here I attach my vi.

[pflores]

hello detech,

I am not quite clear on your question. When you use this VI, does your scope trigger or not? Are you able t get data back into LabVIEW? Does data show up on the screen of the scope?

Regards,

[detech]

I checked my VI. Actually the VI is working. When trigger level is above signals, it is not triggered (from scope). However, the program is still going to next Tkdpo7k read.vi. It looks like scope is triggered.  I expect if scope is not triggered, it stops at Tk7k configure trigger.vi and wait for triggering, rather than going to next step.

What do you think?

[pflores]

That behavior sounds correct. The COnfigure Trigger VI is just changing settings. So once the trigger settings are set, LabVIEW will move on to the next VI. The Read VI should wait until the device is triggered before returning data.