Radio Theory

The Modulated Carrier

Planning: A radio carrier carries the information (like music). See the many ways a carrier can hold information.

Activities: Learn what a sine wave is, then check out the many ways information can be added to a sine wave carrier. Change the frequency, amplitude, and phase of a sine wave carrier and see what happens.

Try your hand modulating a sinusoidal carrier in amplitude, frequency, and phase.

From Circle to Sine Wave -- Map the phase around a circle to the phase along the x-axis of a cosine and sine wave.