How does a speech processor affect a single sideband phone signal?
The correct answer is B: It increases average power. How a speech processor affects a single sideband phone signal is that it increases average power. Speech processors compress the audio, raising the average level, which increases average power output. For amateur radio operators, this makes your signal more effective. Understanding this helps explain speech processor benefits.
Exam Tip
Speech processor effect = increases average power. Think 'S'peech 'P'rocessor = 'S'ignificantly 'P'owers up average. Compresses audio, raising average level, which increases average power output. Not peak power, not harmonic reduction, not IMD reduction - just average power.
Memory Aid
"Speech processor effect = increases average power. Think 'S'peech 'P'rocessor = 'S'ignificantly 'P'owers up average. Compresses audio, raising average level, which increases average power output. Makes signal more effective."
Real-World Application
You use a speech processor on SSB. Without the processor, your average power might be 30% of peak. With the processor compressing the audio, your average power increases to 60% of peak. This makes your signal more effective - higher average power means better signal-to-noise ratio.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Speech processors don't increase peak power - peak power is limited by the transmitter. Processors increase average power, not peak.
Option C: Incorrect. Speech processors don't reduce harmonic distortion - they can actually increase distortion if overused. Harmonic reduction isn't an effect.
Option D: Incorrect. Speech processors don't reduce intermodulation distortion - they can actually increase it if overused. IMD reduction isn't an effect.
题目解析
The correct answer is B: It increases average power. How a speech processor affects a single sideband phone signal is that it increases average power. Speech processors compress the audio, raising the average level, which increases average power output. For amateur radio operators, this makes your signal more effective. Understanding this helps explain speech processor benefits.
考试技巧
Speech processor effect = increases average power. Think 'S'peech 'P'rocessor = 'S'ignificantly 'P'owers up average. Compresses audio, raising average level, which increases average power output. Not peak power, not harmonic reduction, not IMD reduction - just average power.
记忆口诀
Speech processor effect = increases average power. Think 'S'peech 'P'rocessor = 'S'ignificantly 'P'owers up average. Compresses audio, raising average level, which increases average power output. Makes signal more effective.
实际应用示例
You use a speech processor on SSB. Without the processor, your average power might be 30% of peak. With the processor compressing the audio, your average power increases to 60% of peak. This makes your signal more effective - higher average power means better signal-to-noise ratio.
错误选项分析
Option A: Incorrect. Speech processors don't increase peak power - peak power is limited by the transmitter. Processors increase average power, not peak. Option C: Incorrect. Speech processors don't reduce harmonic distortion - they can actually increase distortion if overused. Harmonic reduction isn't an effect. Option D: Incorrect. Speech processors don't reduce intermodulation distortion - they can actually increase it if overused. IMD reduction isn't an effect.
知识点
Speech processor, Average power, SSB signal, Power increase
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.