Benefits of Digital Signals
Physics: Edexcel IGCSE, topic 3.5.2
Benefits of Digital
There are many reasons why digital signals are better than analogue signals. These include:
Reduce noise effects
- In digital signals, noise (which makes the signal fuzzy) can change the 1s and 0s to slightly different values. For example a 1 could become a 0.97 or a 1.01.
- It is easy to tell that a 1.01 or a 0.97 should be a 1, and that a 0.03 or a 0.12 should be a 0.
- Therefore noise can be easily reduced for digital signals.
- For analogue signals, we cannot tell what the original value was because a 0.97 could have been a 0.98, a 0.99, a 0.91 or any other nearby value.
Cost
- Digital communication systems are usually cheaper.
Privacy
- Data encryption means that only a certain person can receive the digital signal.
- Analogue signals are easier to intercept.
Computer compatibility
- Digital information can be more easily processed by computers.
Carry more information
- Digital signals can carry more information per second than analogue signals.
Test yourself on Benefits of Digital Signals
Why is it easier to reduce noise from digital signals and not for analogue signals?
Which of these are true of digital and analogue signals?