Asymmetric Approach for Modulating signal

Hi All

I am trying to obtain a modulating signal using the asymmetric approach in simulink. I have a triangular wave as my carrier signal and a sinusoidal. I now want to obtain the modulating signal. Attached is a scrrenshot from the MathWorks help centre which better describes what I am trying to achieve. I have the triangular wave and the sine wave however I am not sure how to obtain the modulating signal (in orange).

Thanks in advance.

Krishneel Kumar