Which parameter affects receiver sensitivity?
The correct answer is D: All these choices are correct. Parameters that affect receiver sensitivity include: input amplifier gain, demodulator stage bandwidth, and input amplifier noise figure. All three affect how well a receiver can detect weak signals. For amateur radio operators, this explains receiver performance. Understanding this helps when evaluating receivers.
Exam Tip
All three affect receiver sensitivity: input amplifier gain, demodulator bandwidth, input amplifier noise figure. When all listed parameters affect receiver sensitivity, 'all of the above' is usually the answer. All determine how well receiver detects weak signals.
Memory Aid
"All three affect sensitivity: Input amplifier gain, Demodulator bandwidth, Input amplifier noise figure. Think 'A'll 'S'ensitivity 'P'arameters. All three determine how well receiver detects weak signals. Key receiver performance factors."
Real-World Application
Receiver sensitivity is affected by: (1) Input amplifier gain - more gain improves sensitivity, (2) Demodulator stage bandwidth - narrower bandwidth improves sensitivity (less noise), (3) Input amplifier noise figure - lower noise figure improves sensitivity. All three parameters affect how well the receiver can detect weak signals.
Key Concepts
Why Other Options Are Wrong
Option A: While correct, this is incomplete. Demodulator bandwidth and noise figure also affect sensitivity.
Option B: While correct, this is incomplete. Input amplifier gain and noise figure also affect sensitivity.
Option C: While correct, this is incomplete. Input amplifier gain and demodulator bandwidth also affect sensitivity.
题目解析
The correct answer is D: All these choices are correct. Parameters that affect receiver sensitivity include: input amplifier gain, demodulator stage bandwidth, and input amplifier noise figure. All three affect how well a receiver can detect weak signals. For amateur radio operators, this explains receiver performance. Understanding this helps when evaluating receivers.
考试技巧
All three affect receiver sensitivity: input amplifier gain, demodulator bandwidth, input amplifier noise figure. When all listed parameters affect receiver sensitivity, 'all of the above' is usually the answer. All determine how well receiver detects weak signals.
记忆口诀
All three affect sensitivity: Input amplifier gain, Demodulator bandwidth, Input amplifier noise figure. Think 'A'll 'S'ensitivity 'P'arameters. All three determine how well receiver detects weak signals. Key receiver performance factors.
实际应用示例
Receiver sensitivity is affected by: (1) Input amplifier gain - more gain improves sensitivity, (2) Demodulator stage bandwidth - narrower bandwidth improves sensitivity (less noise), (3) Input amplifier noise figure - lower noise figure improves sensitivity. All three parameters affect how well the receiver can detect weak signals.
错误选项分析
Option A: While correct, this is incomplete. Demodulator bandwidth and noise figure also affect sensitivity. Option B: While correct, this is incomplete. Input amplifier gain and noise figure also affect sensitivity. Option C: While correct, this is incomplete. Input amplifier gain and demodulator bandwidth also affect sensitivity.
知识点
Receiver sensitivity, Input amplifier gain, Demodulator bandwidth, Noise figure
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.