Triggering without analog trigger circuity

[nikoskal95]

Hi,

I am new to LabVIEW and DAQ applications, so apologies if my question is naive.

I am using a PXIe-6341 MIO module in a PXI 1071 chassis. 

In my application I need to read an analog input signal and trigger a counter pulses generation, when the analog signal crosses a value of voltage in a sinusoidal oscillation experiment

.

I figured out that the MIO module doesn't support analog triggering as it doesn't have analog triggering circuity.

What do you think that is the best way to build up a software trigger vi as effectively as possible??

Also do you know if the counter pulses (that will trigger a camera acquisition), can be implemented in a loop?

Thanks in advance,

Nikos

[ZYOng]

The best way to use DAQ for control is to use Hardware-Timed Single Point Mode.

Application case 1 of NI-DAQmx Hardware-Timed Single Point Lateness Checking should match your use case.

[nikoskal95]

Dear ZYOng,

Thanks a lot for your reply. It seems that the software triggering is not fast enough for this application.

Do you know if I can configure the trigger with the PXIe-4138 source measure unit?

Nikos

[santo_13]

You can trigger using 4138 but the SMU does not have any means of triggering based on output voltage and there are other sorts of synchronization possible.