#### Example 1.4 | #### Question 1.8 Question 1.9

## The basic mixing process (cont. 3)

#### In order to evaluate this expression, we need to know the trigonometric expansion:
#### Hence we can determine the output of the mixing process as:

#### If we plot the spectrum of the modulated signal, we see that it is centred on the carrier frequency, and for this example, reproduces the components of the baseband data signal exactly mirrored on either side of the carrier. We thus have a method to translate spectral components to any frequency we choose using the mixing process. |

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