RM and AM Spectra

Sidebands are identical, but AM has center frequency in the spectrum.

**Figure 8:** Spectrum of amplitude modulation.
$\begin{figure}\centerline{% \input{amspec.pstex_t}}\end{figure}$

**Figure 9:** Spectrum of ring modulation.
$\begin{figure}\centerline{% \input{spec.pstex_t}}\end{figure}$

A DC offset in the modulator results in a spectrum with the carrier frequency , at an amplitude equal to .

``Music 171: Amplitude Modulation'' by Tamara Smyth, Department of Music, University of California, San Diego (UCSD).