extract part of a signal

[Ravi_Japan]

Hi,

I can display a wave form which I extract inside a while loop. I have another local variable which serves as a counter. The counter counts from 0 to 100 and then reset to 0 again and start counting. I need to extract portions of the signal which correspond to counter values from 0 to 50. Each portion (0-50) of the signal need to be stored as a row in a 2-D array.

Can anyone help me please?

Thanks,

Ravi.

[LV_Pro]

I think that you probably can do this with an index array of the original data, with a little logic to adust the indices, and a case to determine what to save or not. If you have some existing code it might clarify what you are doing to make explaining what you need to do a little easier.

P.M.

[Ravi_Japan]

Please refer to attached vi.  ADModule contains the required library functions for A-D card.

Now, in the Ravi ...test1.vi, while loop at the bottom collects the timing signal. I can access that as a local variable "Parallel Port Counter" in the while loop above, where I collect waveform signal from A-D card.

My timing signal coming from a stepper motor, which can move speciman in x-y plane. It scans line by line in x-direction. First 50 counts are rfering to scanning one line in x-direction and 50-100 means returning back. Now the counter resets, y value increment by one and start to scan the second line in x-direction. So, I want to collect amplitude and phase values into two different arrays as a matrix. Each array should be a 2-D.

I am trying to use the Parallel Port Counter for timing. It counts from 0-100. I want to save amplitude values from the A-D waveform, which corresponding to 0-50 of the counter, into first line of the array. Next 0-50 into second row and so on.

ADBUFMOV.vi can move captured signal from A-D card.

How can I save amplitude corresponding to counter 0-50 values into an array of a file?

Thanks,

 Ravi.