A beginner's question

[Manos]

Hello,
I am a beginner in LabVIEW, and I am trying to get some data from a
transducer and make some basic analysis on it. Actually, the onle thing to
do is make some measurement with the transducer, with some unwanted
components of the signal, software removed.
I tried a rather unsophisticated way, with a AI Acquire Waveform.vi nested
in a while loop, and a waveform graph indicator. This seems to work fine,
but when I tried to add some analysis ( a simple sine wave addition to the
AI Acquire Waveform output), things were strange...
Does anyone has an idea?

Thanks in advance,
Manos

[Gorka Larrea]

How do you add sinewave? What do you mean with things were strange? If you can explain your problem a bit more, or send some type of example, perhaps someone can help...

[John Lum]

Manos,

If you haven't already seen it, I would highly recommend opening and emulating a particular example program that ships with LabVIEW. It's called "Cont Acq&Chart (buffered)", and it lives here:

\examples\daq\anlogin\anlogin.llb

You'll find the recommended program structure for buffered continuous acquisition, plus a subVI called "My Data Processing" that shows where in your diagram is the right place to put your software filtering.

Hope it helps,
John Lum
National Instruments