Deep Dive: G7C02
The correct answer is D: Double-sideband modulated RF. The output produced by a balanced modulator is double-sideband modulated RF. Balanced modulators suppress the carrier and produce only the two sidebands (USB and LSB). For amateur radio operators, this is the first step in SSB generation. Understanding this helps when designing SSB transmitters.
Why Other Answers Are Wrong
Option A: Incorrect. Balanced modulators don't produce frequency modulated RF - they produce amplitude-modulated sidebands, not FM. FM is different. Option B: Incorrect. Balanced modulators don't produce audio with equalized frequency response - they produce RF sidebands, not audio. Audio equalization isn't the output. Option C: Incorrect. Balanced modulators don't extract audio from modulation signal - they produce RF sidebands. Audio extraction is for receivers, not modulators.
Exam Tip
Balanced modulator output = double-sideband modulated RF. Think 'B'alanced 'M'odulator = 'B'oth 'M'odulation sidebands. Balanced modulators suppress carrier and produce only the two sidebands (USB and LSB). Not FM, not audio, not audio extraction - just double-sideband RF.
Memory Aid
Balanced modulator output = double-sideband modulated RF. Think 'B'alanced 'M'odulator = 'B'oth 'M'odulation sidebands. Balanced modulators suppress carrier and produce only the two sidebands. First step in SSB generation.
Real-World Example
A balanced modulator: Audio input modulates a carrier, but the carrier is suppressed. The output contains only the upper and lower sidebands (double-sideband, suppressed carrier). This is the first step in SSB generation - next, a filter selects one sideband. Balanced modulators produce double-sideband output.
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.