Analog Trigger with PXI-6229

[Russ@Davis]

I have an application using a PXI-1010 chassis, PXI-6229 DAQ, communicating with MXI-4 to the host computer.

For task triggering, the only direct option I'm finding is the digital trigger. However, I need to trigger on a low-lever analog signal (180mv). Can this be accomplished indirectly and start the task with a minor delay? If I can trigger the signal on the positive slope, I could have potentially a 1ms delay to begin the task and not affect my data.

[e-Cash-Money]

Hello Russ,

The M Series 6229 should be able to support hardware analog triggering. Take a look at the following example to see how to accomplish this in LabVIEW.

http://venus.ni.com/stage/we/niepd_web_display.DISPLAY_EPD4?p_answer=&p_guid=DC9C549F7FDC1973E034080020E74861&p_node=DZ52000&p_rank=&p_source=External&p_submitted=N

If this doesn't work out for you and you don't mind having a delay between the low-level analog signal and the start of the task, you could always use a software analog trigger. Examples of this can be found in the LabVIEW NI Example Finder.

Take care,
E.Lee

[Stuart_G]

Unfortunately E. Lee is incorrect. The 6229 does not support analog HW triggers (the page he referenced needs to be updated). Sorry about that Russ. He is correct though that you could use a SW analog trigger. The example he is referring to is:

Cont Acq&Graph Voltage-Analog SW Trigger

StuartG