correlation Peak Width

[DavidIMurray]

Hi

I am comparing a large number of waveforms and I would like to get a single value as a measure of the correlation. When I compare two waveforms, I get a graph as per the attached image. What I am looking for is a way of measuring the width of the 'flatish' peak across the the top of the triangular form.

Any help greatly appreciated.

Cheers

Dave

[falkpl]

You might be able to find the "Corners" that is where the flat top occurs by looking at the dirivitive to the curve, the 2 shrapest changes in slope wil be these corners.  the X difference between these two points is the flat top width.  There are also wave form measurments for width but I have only used them with square waves.

Paul

[Tom.]

Hello David,

You may have to write a VI yourself to do this. From that graph alone you can notice that the gradient between certain points upto the peak looks to be constant. You could detect when the gradient changes to a smaller value the signal will be becoming flatter, so when the gradient becomes greater again (in magnitude) you will know this is the end of the flattening off.

I hope this helps.

Tom
NIUK