Exam-style question
Try this first
A timing diagram shows a guard interval of 1 µs between two channels. What is the purpose of this guard interval?.
- A.To allow for signal rise/fall times
- B.To increase the data rate
- C.To reduce power consumption
- D.To provide error correction
Model answer
What a good answer should say
- To allow for signal rise/fall times
Explanation
Why this works
Evidence: the diagram includes a 1 µs gap between adjacent time slots. Interpretation: this gap gives the signal time to settle after one channel ends before the next begins, preventing overlap due to finite rise/fall times.
Implication: the guard interval ensures clean separation of channels. Conclusion: its purpose is to allow for signal rise/fall times.
Common mistake
No common mistake is linked to this question yet.