What occurs when the input signal levels to a mixer are too high?
The correct answer is A: Spurious mixer products are generated. What occurs when the input signal levels to a mixer are too high is that spurious mixer products are generated. High input levels cause unwanted mixing products. For amateur radio operators, this is important for mixer operation. Understanding this helps when operating mixers.
Exam Tip
Mixer input levels too high = spurious mixer products generated. Think 'M'ixer 'H'igh 'I'nput = 'M'any 'H'armonic 'I'ntermodulation products. High input levels cause unwanted mixing products. Not mixer blanking, not automatic limiting, not AGC voltage - just spurious products.
Memory Aid
"Mixer input levels too high = spurious mixer products generated. Think 'M'ixer 'H'igh = 'S'purious products. High input levels cause unwanted mixing products. Important for mixer operation."
Real-World Application
When input signal levels to a mixer are too high: Spurious mixer products are generated. The mixer becomes nonlinear and creates unwanted mixing products. This is what occurs - spurious products generated.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Mixer blanking isn't what occurs - spurious products are generated when inputs are too high. Mixer blanking isn't what occurs.
Option C: Incorrect. Automatic limiting isn't what occurs - spurious products are generated when inputs are too high. Automatic limiting isn't what occurs.
Option D: Incorrect. Excessive AGC voltage levels isn't what occurs - spurious products are generated when inputs are too high. AGC voltage isn't what occurs.
题目解析
The correct answer is A: Spurious mixer products are generated. What occurs when the input signal levels to a mixer are too high is that spurious mixer products are generated. High input levels cause unwanted mixing products. For amateur radio operators, this is important for mixer operation. Understanding this helps when operating mixers.
考试技巧
Mixer input levels too high = spurious mixer products generated. Think 'M'ixer 'H'igh 'I'nput = 'M'any 'H'armonic 'I'ntermodulation products. High input levels cause unwanted mixing products. Not mixer blanking, not automatic limiting, not AGC voltage - just spurious products.
记忆口诀
Mixer input levels too high = spurious mixer products generated. Think 'M'ixer 'H'igh = 'S'purious products. High input levels cause unwanted mixing products. Important for mixer operation.
实际应用示例
When input signal levels to a mixer are too high: Spurious mixer products are generated. The mixer becomes nonlinear and creates unwanted mixing products. This is what occurs - spurious products generated.
错误选项分析
Option B: Incorrect. Mixer blanking isn't what occurs - spurious products are generated when inputs are too high. Mixer blanking isn't what occurs. Option C: Incorrect. Automatic limiting isn't what occurs - spurious products are generated when inputs are too high. Automatic limiting isn't what occurs. Option D: Incorrect. Excessive AGC voltage levels isn't what occurs - spurious products are generated when inputs are too high. AGC voltage isn't what occurs.
知识点
Occurs, Input signal levels to mixer, Too high, Spurious mixer products generated
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.