Explain what modulation and demodulation is

[sanado]

Hey guys, was just wondering if you could explain what modulation and demodulation is and more importantly, why it needs to occur in things such as radio stations.

Also, can you also explain how modulation and demodulation occur when fibre optics are involved?

 

[Andrew Mason]

Hey guys, was just wondering if you could explain what modulation and demodulation is and more importantly, why it needs to occur in things such as radio stations.

See:

http://en.wikipedia.org/wiki/Amplitude_modulation

http://en.wikipedia.org/wiki/Frequency_modulation

Also, can you also explain how modulation and demodulation occur when fibre optics are involved?

See:

http://en.wikipedia.org/wiki/Optical_modulator

AM