save real-time data

[Andrea]

Hello!
I'm at the begin with LabView. I'd like to verify my signal with an
oscilloscope. After this, when i active a light, the power of this
signal must be save. I have found the oscilloscope VI. I'm tring to
modify it in order to save, when it's necessary, this power. How can i
get the power from a waveform signal and save it continuosly (i.e. in
"real-time mode") in a file?
thank you for the help and sorry for my english...

Andrea

[chutla]

Hello Andrea:

The simplest way to save Oscilloscope data is with the Wave File tools. The oscilloscope data will be in the form of a 1D array. I assume you know what the impedance of the load is that you're measuring the power at. If you do, the power is simply E^2/R. For RMS power, be sure to divide E by 2.82. A more direct way, if you also have a CURRENT sample available is to multiply E*I. I've attached a very simple oscilloscope/data save.vi

Hope this helps. Lots of luck!

Chutla