Question
What is the approximate bandwidth of a VHF repeater FM voice signal?
Answer Options
- A) Less than 500 Hz
- B) About 150 kHz
- C) Between 10 and 15 kHz
- D) Between 50 and 125 kHz
Correct Answer: C
Explanation
VHF repeater signals use Frequency Modulation (FM) to provide high-quality audio (T8A04). FM requires a much wider bandwidth than SSB (T8A07) because the information is contained in the amount of frequency shift (deviation), rather than the signal’s amplitude.
For VHF/UHF amateur use, the wide-band FM standard requires a bandwidth between 10 and 15 kHz to transmit and receive the full range of audio without distortion (T2B05). This wide signal provides excellent noise immunity but limits the number of conversations that can fit into a given band segment.
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