Adding infomation to waves-P6

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  • Created by: kira
  • Created on: 19-06-11 12:06

(notes taken from the CGP revision guides)

  • Information is converted into signals.
  • Infomation is being transmitted everywhere all the time.
  • Whatever kind of information you're sending is converted into electrical signals before it's transmitted.
  • It's then sent long distances down telephone wires or carried on EM waves.
  • There are two ways you can send information as waves- AM and FM.
  • AM Radio Waves have varying amplitude.
  • An AM radio transmitter sends out continuous carrier wave.
  • The signal is superimposed on the carrier wave using amplitude modulation.
  • AM-Amplitude Modulation: The sound wave from the music 'modulates' or changes…


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