Phase Shift Calculation

[Zipmeister]

I have a two part question. I am using a DAQ board to read four different voltages. I want to measure the phase shift between the voltages and a sine function and display the sine function on the same graph as the voltages. I generated oa sine function with the same frequency as my the signal being mesured by the DAQ board, but when I tried to just use the Dual Channel Spectral Measurement express vi, I received an error that the two signals had different dt. I then tried to use the align waveforms vi. I then wired the two ouputs to the dual channel spectral measurement vi, but no matter what I do to the input signal, the phase shift always reads 0 (which I know to be incorrect. What should I do to fix this and how can I display the generated sine function and the data signal on the same graph?

Thanks,

Matthew

[johnsold]

Matthew,

It is hard to tell what is going on without data.  Please run your VI so that you have some typical data displayed on the data and data 2 graphs. Then Edit >> Make Current Values Default. Save the VI. Post that VI which will then have the data saved.

I do not have the DAQ Assistant, so I cannot see what settings you used.

You can simplify the VI significantly by eliminating the sequence structure and the local variables.

Lynn