Engineering Studies – H4 Telecommunication Engineering – Electricity
This topic compares the features and applications of analogue and digital signals.
Definitions and an understanding of communication options are the key concepts.
- Definition of an analogue signal
- Definition of a digital signal
- Communication links
- Describe the two main differences between analogue and digital signals.
- Why does digital signalling usually perform better than analogue signalling in a noisy communications channel?
- Give four reasons why telecommunications systems are increasingly becoming digital rather than analogue.
- Explain why you would either (a) double the bandwidth, or (b) double the signal amplitude if you had money to spend to improve the channel capacity of a telecommunications link.
- Give a reason why Amplitude Modulation is preferable to Frequency Modulation for radio broadcasting?
- What is ‘noise’ in a communication link?
- Give a reason why Frequency Modulation is preferable to Amplitude Modulation for radio broadcasting?
- Describe three ways in which digital information can be represented as an analogue signal.
- Describe the significant feature of a binary digital signal.
- What is the common unit used to measure amplitude of a telecommunication signal?
- What is the definition of wavelength period and wavelength frequency?
- What are three characteristics that determine the maximum capacity of a communication link?