Exam-style question
Try this first
A timing diagram shows two channels, A and B, each occupying alternate 5 µs slots on a shared transmission line. Which statement best describes the principle of time‑division multiplexing illustrated?.
- A.Each channel transmits continuously on the line
- B.Channels share the line by alternating time slots
- C.Channels are transmitted simultaneously but at different frequencies
- D.Channels are transmitted sequentially with a guard interval
Model answer
What a good answer should say
- Channels share the line by alternating time slots
Explanation
Why this works
Evidence: the diagram displays a repeating pattern where channel A occupies a 5 µs slot, followed immediately by channel B for 5 µs, and this repeats. Interpretation: this pattern shows that each channel is assigned a distinct time interval on the same physical medium.
Implication: the shared medium is used efficiently by allocating separate time slots to each channel, which is the core idea of time‑division multiplexing. Conclusion: therefore the correct description is that channels share the line by alternating time slots.
Common mistake
No common mistake is linked to this question yet.