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Analogue and digital signals (A-level only)

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12
Question 1

A seismometer detects ground movement as a continuous electrical analogue signal. This analogue signal is converted into a digital format by an analogue-to-digital converter (ADC) before being stored and transmitted to a data logging center.

Discuss the key physical and technical principles of this analogue-to-digital conversion.

In your answer you should include:

  • what is meant by sampling and quantisation
  • the factors that affect how accurately the digital representation matches the original seismic signal
  • the advantages and disadvantages of using a digital format over an analogue format for this application.
[6]
Markscheme

Analogue and digital signals (A-level only) Questions

  1. A Level
  2. /Physics
  3. /Analogue and digital signals (A-level only)

5 exam-style questions on AQA A Level Physics Analogue and digital signals (A-level only), covering Difference between analogue and digital signals (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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