# Power spectrum for real, imaginary and complex functions.

## Homework Statement

What can we say about the evenness and oddness of the power spectrum (|F(s)|$^{2}$) if the input fuction is purely real, purely imaginary or complex?

I know that a real function will give an even power spectrum. But I can't prove it!

## Homework Equations

F(s) = A(s)e$^{j\Phi(s)}$
|F(s)|^2 = F(s).F*(s)

I'm stumped!