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Data communication systems (A-level only)

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Question 3

A media broadcasting center transmits 12 high-quality audio channels across a single high-bandwidth link. Before transmission, each analogue audio signal is converted using Pulse Code Modulation (PCM). These digital signals are then combined onto the single link using Time Division Multiplexing (TDM). To combat signal degradation over long distances, digital regenerators are placed at regular intervals along the transmission line.

Explain the fundamental principles of:

  • Pulse Code Modulation (PCM)
  • Time Division Multiplexing (TDM)
  • The role and operation of a digital regenerator.
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Markscheme

Data communication systems (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Data communication systems (A-level only)

22 exam-style questions on AQA A Level Physics Data communication systems (A-level only), covering Principles of communication systems (A-level only), Transmission media (A-level only), Time-division multiplexing (A-level only), and Amplitude (AM) and frequency modulation (FM) techniques (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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