average and trigger signal

[Rocking123]

I know how to program to acquire signal. But I donot know how to average and trigger my signal as an oscilloscope work? Do i have to use "averaged dc-rms VI" to calculate average the dc and /or rms values of an input waveform?  In oscilliscope, I can choose to average 16,32,64....512. How do I achieve here? There is also a bandwidth filter in scope.

[crossrulz · Accepted solution]

The trigger is nothing but looking for a crossing of a certain level.  You can use a simple Greater Than or a Less Than to find that.  To average like a scope, you need to acquire the signal multiple times.  You can then perform the average for each data point in a FOR loop.