Exam-style question
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A signal-time graph shows a series of square waves alternating between high and low voltage. What type of signal does this graph represent?.
Model answer
What a good answer should say
- The graph represents a digital signal, as it shows discrete levels of voltage rather than a continuous range.
Explanation
Why this works
The evidence of square waves indicates that the signal switches between distinct high and low states. This shows that the signal is not continuous, which is characteristic of digital signals.
The implication is that digital signals can represent information in a binary format, leading to more robust communication systems. Therefore, the conclusion is that the graph illustrates the nature of digital signals effectively.
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