What does the MDS of a receiver represent?
The correct answer is B: The minimum discernible signal. What does the MDS of a receiver represent is the minimum discernible signal. MDS = Minimum Discernible Signal. For amateur radio operators, this is important for receiver performance. Understanding this helps when evaluating receivers.
Exam Tip
MDS = minimum discernible signal. Think 'M'DS = 'M'inimum 'D'iscernible 'S'ignal. MDS is the weakest signal a receiver can detect. Not meter display, not modulation distortion, not maximum spectrum - just minimum discernible signal.
Memory Aid
"MDS = minimum discernible signal. Think 'M'DS = 'M'inimum 'D'iscernible 'S'ignal. MDS is the weakest signal a receiver can detect. Important for receiver performance."
Real-World Application
The MDS of a receiver: It represents the minimum discernible signal - the weakest signal that the receiver can detect. MDS is a measure of receiver sensitivity. Lower MDS means better sensitivity. This is what MDS represents - minimum discernible signal.
Key Concepts
Why Other Options Are Wrong
Option A (Meter display sensitivity): Incorrect. Meter display sensitivity isn't MDS - MDS is minimum discernible signal. Meter display isn't MDS.
Option C (Modulation distortion specification): Incorrect. Modulation distortion specification isn't MDS - MDS is minimum discernible signal. Modulation distortion isn't MDS.
Option D (Maximum detectable spectrum): Incorrect. Maximum detectable spectrum isn't MDS - MDS is minimum discernible signal. Maximum spectrum isn't MDS.
题目解析
The correct answer is B: The minimum discernible signal. What does the MDS of a receiver represent is the minimum discernible signal. MDS = Minimum Discernible Signal. For amateur radio operators, this is important for receiver performance. Understanding this helps when evaluating receivers.
考试技巧
MDS = minimum discernible signal. Think 'M'DS = 'M'inimum 'D'iscernible 'S'ignal. MDS is the weakest signal a receiver can detect. Not meter display, not modulation distortion, not maximum spectrum - just minimum discernible signal.
记忆口诀
MDS = minimum discernible signal. Think 'M'DS = 'M'inimum 'D'iscernible 'S'ignal. MDS is the weakest signal a receiver can detect. Important for receiver performance.
实际应用示例
The MDS of a receiver: It represents the minimum discernible signal - the weakest signal that the receiver can detect. MDS is a measure of receiver sensitivity. Lower MDS means better sensitivity. This is what MDS represents - minimum discernible signal.
错误选项分析
Option A (Meter display sensitivity): Incorrect. Meter display sensitivity isn't MDS - MDS is minimum discernible signal. Meter display isn't MDS. Option C (Modulation distortion specification): Incorrect. Modulation distortion specification isn't MDS - MDS is minimum discernible signal. Modulation distortion isn't MDS. Option D (Maximum detectable spectrum): Incorrect. Maximum detectable spectrum isn't MDS - MDS is minimum discernible signal. Maximum spectrum isn't MDS.
知识点
MDS, Receiver, Minimum discernible signal, Receiver sensitivity
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.