05-12-2008 11:50 AM
05-12-2008 11:56 AM
05-12-2008 11:58 AM
05-12-2008 12:00 PM
05-12-2008 12:22 PM
05-12-2008 12:29 PM
This is not a tutorial, but does discuss the subject: http://forums.ni.com/ni/board/message?board.id=170&message.id=301471
Here they discuss measuring a tone and there are some VI's posted. Maybe they can give you ideas on how to proceed:
http://forums.ni.com/ni/board/message?board.id=170&message.id=260114
I don't know if they use Express VI's, but you can check..
Here they discuss FFT to extract info on a tone measurement: http://forums.ni.com/ni/board/message?board.id=170&message.id=209525
The best one to read is here: http://forums.ni.com/ni/board/message?board.id=170&view=by_date_descending&message.id=291603#M291603
And there's more if you do a search.
RayR
05-12-2008 12:34 PM
05-12-2008 01:28 PM
05-12-2008 01:33 PM
OK... so the issue is not really how to do Tone Measurements, it is how to expand from the VI that you received.
The easiest solution would be for you to post that particular VI or at least an image of it (especially since I don't have LV installed on this PC).
Let's tackle the number of samples first.
There must be a FOR or WHILE Loop that has a value of 100 wired to the number of iterations. If it is a control, then you can change it to a larger value from the Front Panel. If it is a constant (unlikely - I hope) then right click on it and select "Change to Control" and then you can change it's value easily from the Front Panel. You may simply change the contant to a value better suited for your application.
Can you describe the Excel problem that you are having?
RayR