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Հարց 315

Which of the following is a disadvantage of FM compared with single sideband?

  1. Voice quality is poorer
  2. Only one signal can be received at a timeՃիշտ պատասխան
  3. FM signals are harder to tune
  4. FM signals are more susceptible to high SWR

Բացատրություն

FM receivers exhibit the capture effect: the stronger of two signals on the same frequency suppresses the weaker one entirely, so only one can be heard at a time, while on SSB several signals in the passband are all audible at once. FM voice quality is generally better rather than poorer, and FM is easier to tune, so those choices are wrong.

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Հարց 315: Which of the following is a disadvantage of FM compared… · FCC Technician Class (Element 2) · Questena