#### psi

##### Member level 2

**spectrum of sine wave**

How can one get the amplitude spectrum of a sine wave?

For example, have a look at

http://www.mip.sdu.dk/~fonseca/bachelor_project/html_sections/se-oscilloscope-test.html

The amplitude spectrum of a sine wave is a spike in amplitude.

How can I get it using calculations? Do I just get the fourier transform of the sine wave and then do the absolute value?

I'm really stumped.