Question
What is the relationship between transmitted symbol rate and bandwidth?
Answer Options
- A) Symbol rate and bandwidth are not related
- B) Higher symbol rates require wider bandwidth
- C) Lower symbol rates require wider bandwidth
- D) Bandwidth is half the symbol rate
Correct Answer: B
Explanation
The symbol rate (or baud rate) is the number of times per second that a characteristic of the transmitted signal (like frequency, phase, or amplitude) is changed to encode information. Bandwidth is the total spectral width the signal occupies.
There is a direct relationship: higher symbol rates require wider bandwidth. This is an unavoidable consequence of physics; the faster a signal changes state, the wider the range of frequencies it must occupy. Therefore, amateur regulations often place an upper limit on symbol rates for certain bands to control the required bandwidth and prevent interference.
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