Which of the following statements is true of single sideband (SSB)?
The correct answer is B: Only one sideband is transmitted; the other sideband and carrier are suppressed. A true statement about single sideband (SSB) is that only one sideband is transmitted; the other sideband and carrier are suppressed. SSB removes both the carrier and one sideband, transmitting only the remaining sideband with the audio information. For amateur radio operators, this is what makes SSB efficient - no carrier power is wasted, and bandwidth is halved. Understanding this helps explain SSB's efficiency.
Exam Tip
SSB = one sideband transmitted, carrier and other sideband suppressed. Think 'S'ingle 'S'ideband = 'S'uppresses carrier and 'S'uppresses one sideband. Only one sideband with audio information is transmitted. Not about being the only authorized mode.
Memory Aid
"SSB = one sideband transmitted, carrier and other sideband suppressed. Think 'S'ingle 'S'ideband = 'S'uppresses carrier and 'S'uppresses one sideband. Only one sideband with audio is transmitted. This is SSB's key characteristic."
Real-World Application
Your SSB transmitter generates an AM signal, then suppresses the carrier and one sideband (lower sideband for USB, upper sideband for LSB). Only the remaining sideband is transmitted, containing all the audio information. This is what makes SSB efficient - no carrier power wasted, and only half the bandwidth of AM.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. SSB doesn't transmit the carrier - the carrier is suppressed along with one sideband. Only one sideband is transmitted.
Option C: Incorrect. SSB isn't the only voice mode on 20m, 15m, and 10m - AM is also allowed, though rarely used. SSB is most common but not exclusive.
Option D: Incorrect. SSB isn't the only voice mode on 160m, 75m, and 40m - AM is also allowed. SSB is most common but not exclusive.
题目解析
The correct answer is B: Only one sideband is transmitted; the other sideband and carrier are suppressed. A true statement about single sideband (SSB) is that only one sideband is transmitted; the other sideband and carrier are suppressed. SSB removes both the carrier and one sideband, transmitting only the remaining sideband with the audio information. For amateur radio operators, this is what makes SSB efficient - no carrier power is wasted, and bandwidth is halved. Understanding this helps explain SSB's efficiency.
考试技巧
SSB = one sideband transmitted, carrier and other sideband suppressed. Think 'S'ingle 'S'ideband = 'S'uppresses carrier and 'S'uppresses one sideband. Only one sideband with audio information is transmitted. Not about being the only authorized mode.
记忆口诀
SSB = one sideband transmitted, carrier and other sideband suppressed. Think 'S'ingle 'S'ideband = 'S'uppresses carrier and 'S'uppresses one sideband. Only one sideband with audio is transmitted. This is SSB's key characteristic.
实际应用示例
Your SSB transmitter generates an AM signal, then suppresses the carrier and one sideband (lower sideband for USB, upper sideband for LSB). Only the remaining sideband is transmitted, containing all the audio information. This is what makes SSB efficient - no carrier power wasted, and only half the bandwidth of AM.
错误选项分析
Option A: Incorrect. SSB doesn't transmit the carrier - the carrier is suppressed along with one sideband. Only one sideband is transmitted. Option C: Incorrect. SSB isn't the only voice mode on 20m, 15m, and 10m - AM is also allowed, though rarely used. SSB is most common but not exclusive. Option D: Incorrect. SSB isn't the only voice mode on 160m, 75m, and 40m - AM is also allowed. SSB is most common but not exclusive.
知识点
Single sideband, SSB characteristics, Carrier suppression, Sideband suppression
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.