Trigger event with analogue (D/A) output generated from the DAQ

[zientist]

Hi all,

I am using a DAQ USB 6251.  Basically what I need it to do is pretty simple.

* DAQ card generates sine wave - 23Hz and 2.5V with 2.6V offset  (i.e. D/A)
* This signal is then used to drive a device, which then generates an output to be monitored by the DAQ card (A/D)

Problems:
1) I see the signal and the DAQ behaves the way it should except that the received waveform (on XY plot) just keeps on going (i.e. its not triggered and still - as it should be on a normal oscilloscope).

2) I would also like to see the sine waveform that I generate so that I can see where I am triggering it from.

Can you please propose any solutions.  My VI is attached.   (Btw the VI is a modified version of the one given in the NI examples called: Multi-Function-Synch AI-AO)


Thanks

[RT4CY]

I understand you are trying to control how your data is displayed on the XY plot.  There are a few different approaches you can take.  If you would like to display the data to look exactly like an oscilloscope I would use a Waveform Chart and use the Scope Chart update mode.  You can change the update mode in the properties of the waveform chart.  If you would like to keep the XY plot, take a look at this KnowledgeBase.

[zientist]

Thanks a lot Rod, I'll give that a go.