Discussion
What is the main advantage of single sideband for long-distance voice work?
Answer: B
SSB gives the message bandwidth only and puts every watt into information, which together are worth many decibels of effective improvement over full-carrier AM on a crowded band. The receiver is more complex, needing a reinserted carrier of accurate frequency. It is less troubled by selective fading than double sideband but not immune. And its envelope varies, so linear amplification is required, which is one of its practical costs.
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