Tutorial #1

• List the three basic components of a communication system.

  • Transmitter
  • Communication Channel
  • Receiver
• List three different types of media are used in communication systems

  • Electrical Conductors
  • Optical Media
  • Free Space
• State the type of communication link.

  Simplex Link

  
• Explain the operation of this communication link

  In ‘Duplex’ communications, information travel in two directions .

  
• Explain the difference between a ‘Simplex’ and ‘Full-Duplex’ link.

  ‘Full-Duplex’ features simultaneous transmission but ‘Simplex’ does not .
• Explain the difference between ‘Half-Duplex’ and ‘Full-Duplex’ communication links

  In ‘Half-Duplex’ communications, information travels in two directions but not together at the same time but in ‘Full-Duplex’ communications, information travels in two directions simultaneously .
• State 2 advantages of ‘Digital Transmission’.

  • Maintain Data Integrity
  • Transmit Longer Distance
• State an advantage of ‘Serial’ digital transmission mode.

  It is used for longer distance transmission as there are no ‘skew’ problems .
• Describe ‘Asynchronous’ transmission in digital communications.

  Each character is transmitted independently of all other characters .
• State the various types of ‘Multiple Access’ scheme.

  • Frequency Division Multiple Access (FDMA)
  • Time Division Multiple Access (TDMA)
  • Code Division Multiple Access (CDMA)
  • Space Division Multiple Access (SDMA)
• What does ‘CDMA’ stand for?

  Code Division Multiple Access
• State the name of the device that enables simultaneous transmission of several separate information channels over the same transmission medium without interference.

  Multiplexing