Strange shift in FM modulation

Hello OR developers!

I read materials/manulas on how to perform the FM modulation on the site of NOR and created my own VI.

When I modulate signal I can see that there is a phase shift strange between Message signal (red color) and FM (blue color).

If I understand well the signal modulated in frequency theory must have maximum frequency directly to a point where the signal of Message offers a maximum amplitude.

I studied my VI but can not find where I have error, maybe someone experienced users can see?

VI is attached below. (LabView 7.1)

Thanks in advance.

I modified your first VI.  Is this the feature you were looking for?

Tags: NI Software

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