Which of the following describes problems caused by poor dynamic range in a receiver?
The correct answer is A: Spurious signals caused by cross modulation and desensitization from strong adjacent signals. Which of the following describes problems caused by poor dynamic range in a receiver is spurious signals caused by cross modulation and desensitization from strong adjacent signals. Poor dynamic range causes cross-modulation and desensitization. For amateur radio operators, this is important for receiver performance. Understanding this helps when troubleshooting receivers.
Exam Tip
Poor dynamic range problems = spurious signals from cross modulation and desensitization by strong adjacent signals. Think 'P'oor 'D'ynamic 'R'ange = 'P'roblematic 'D'istortion 'R'esults (cross-mod/desense). Poor dynamic range causes cross-modulation and desensitization. Not oscillator instability, not insufficient LO, not audio distortion - just cross-mod and desensitization.
Memory Aid
"Poor dynamic range problems = spurious signals from cross modulation and desensitization by strong adjacent signals. Think 'P'oor 'D'ynamic 'R'ange = 'C'ross-mod/'D'esensitization. Poor dynamic range causes cross-modulation and desensitization. Important for receiver performance."
Real-World Application
Poor dynamic range in a receiver: It causes spurious signals from cross modulation and desensitization from strong adjacent signals. Strong nearby signals can cross-modulate onto the desired signal and desensitize the receiver. This is the problem - cross-modulation and desensitization.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Oscillator instability requiring retuning and loss of opposite sideband isn't caused by poor dynamic range - cross-modulation and desensitization are. Oscillator instability isn't the problem.
Option C: Incorrect. Poor weak signal reception from insufficient LO injection isn't caused by poor dynamic range - cross-modulation and desensitization are. Insufficient LO isn't the problem.
Option D: Incorrect. Oscillator instability and severe audio distortion isn't caused by poor dynamic range - cross-modulation and desensitization are. Audio distortion isn't the problem.
题目解析
The correct answer is A: Spurious signals caused by cross modulation and desensitization from strong adjacent signals. Which of the following describes problems caused by poor dynamic range in a receiver is spurious signals caused by cross modulation and desensitization from strong adjacent signals. Poor dynamic range causes cross-modulation and desensitization. For amateur radio operators, this is important for receiver performance. Understanding this helps when troubleshooting receivers.
考试技巧
Poor dynamic range problems = spurious signals from cross modulation and desensitization by strong adjacent signals. Think 'P'oor 'D'ynamic 'R'ange = 'P'roblematic 'D'istortion 'R'esults (cross-mod/desense). Poor dynamic range causes cross-modulation and desensitization. Not oscillator instability, not insufficient LO, not audio distortion - just cross-mod and desensitization.
记忆口诀
Poor dynamic range problems = spurious signals from cross modulation and desensitization by strong adjacent signals. Think 'P'oor 'D'ynamic 'R'ange = 'C'ross-mod/'D'esensitization. Poor dynamic range causes cross-modulation and desensitization. Important for receiver performance.
实际应用示例
Poor dynamic range in a receiver: It causes spurious signals from cross modulation and desensitization from strong adjacent signals. Strong nearby signals can cross-modulate onto the desired signal and desensitize the receiver. This is the problem - cross-modulation and desensitization.
错误选项分析
Option B: Incorrect. Oscillator instability requiring retuning and loss of opposite sideband isn't caused by poor dynamic range - cross-modulation and desensitization are. Oscillator instability isn't the problem. Option C: Incorrect. Poor weak signal reception from insufficient LO injection isn't caused by poor dynamic range - cross-modulation and desensitization are. Insufficient LO isn't the problem. Option D: Incorrect. Oscillator instability and severe audio distortion isn't caused by poor dynamic range - cross-modulation and desensitization are. Audio distortion isn't the problem.
知识点
Poor dynamic range, Receiver, Spurious signals, Cross modulation, Desensitization, Strong adjacent signals
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.