Analogue and digital signals (A-level only)

Question 2

A deep-sea hydrophone records the low-frequency acoustic vocalizations of blue whales as a continuous analogue voltage signal. To transmit this data back to a research facility via a low-bandwidth satellite link, the signal must first be converted into a digital format using an analogue-to-digital converter (ADC).

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

In your answer you should include:

what is meant by the terms sampling and quantisation
how the sampling frequency (referencing the Nyquist criterion) and the bit depth affect the fidelity of the digital recording
the specific advantages and disadvantages of using a digital format over an analogue format for this remote telemetry application.

[6]

Analogue and digital signals (A-level only)

1 2

Question 2

A deep-sea hydrophone records the low-frequency acoustic vocalizations of blue whales as a continuous analogue voltage signal. To transmit this data back to a research facility via a low-bandwidth satellite link, the signal must first be converted into a digital format using an analogue-to-digital converter (ADC).

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

In your answer you should include:

what is meant by the terms sampling and quantisation
how the sampling frequency (referencing the Nyquist criterion) and the bit depth affect the fidelity of the digital recording
the specific advantages and disadvantages of using a digital format over an analogue format for this remote telemetry application.

[6]

Analogue and digital signals (A-level only)

Question 2

Analogue and digital signals (A-level only) Questions

Analogue and digital signals (A-level only)

Question 2

Analogue and digital signals (A-level only) Questions