Communication Systems

Elements of Communication System, Basic Terminologies

  • The exchange of information between a sender and receiver is called COMMUNICATION.
  • The arrangement of devices to transfer the information is called the COMMUNICATION SYSTEM.
  • A communication system consists of three essential parts
    1) transmitter 2) medium 3) receiver.
  • If the information is communicated between two points, this method is called POINT TO POINT MODE.
  • If the information is communicated from one point to several points, this method of communication is called BROAD CASTING MODE.
  • ANALOG SIGNAL : - Any physical variable is converted into continuous variations of current or voltage. These changes are analogous to the change of the information.
  • DIGITAL SIGNAL : - The physical variables are converted into stepwise variations of current or voltage.
  • TRANSDUCERS are devices that converts one form of energy into another form
  • Microphone – converts sound into electrical variables.
  • Speaker – converts electrical variables into sound.

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