Deep Dive: G7C08
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.
Why Other Answers 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.
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 Example
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.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G7C
Reference: 2023-2027 Question Pool · G7 - Practical Circuits
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G7C topic.