Deep Dive: E7E09
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.
Why Other Answers 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.
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 Example
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.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E7E
Reference: 2024-2028 Question Pool · E7 - Practical Circuits
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E7E topic.