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Define the term multiplexing and frequency division multiplexing (FDM).

Define the term multiplexing

• The term multiplexing is used to describe the division of a large bandwidth in to a series of smaller bandwidth channels.

• These smaller channels are termed base band channels and the transmission channel from which they are derived is termed the broadband, or bearer channel.


Frequency Division Multiplexing (FDM).
  • Used in analogue systems.
  • A number of base-band channels are derived from a common wide band transmission path.
  • Each channel modulates a different channel frequency.
  • 24 channels can be achieved on a single copper wire pair.
  • Hundreds of channels can be achieved on a coaxial cable pair.