Why does the "Mixer" block from the RF Blockset 2.3 (R2008b) not change the center frequency of the input signal?

When I use the "Mixer" block, it adds noise to input signal, but does not change the carrier frequency. Why is there no "mixing"?

Answer 1

[MathWorks Support Team]

The "Mixer" block is intended to model the noise present of a physical mixer. It is not intended to perform any frequency conversion.

If you wish to up or down convert, multiply the signal by a sinusoid of the desired frequency and filter appropriately.

Look at the attached example that illustrates how Simulink world interact with the RF world. If you change the frequencies of the input sine waves, that might help understanding how the Mixers work.