Deep Dive: E7E04
The correct answer is A: Use a balanced modulator followed by a filter. What is one way to produce a single-sideband phone signal is to use a balanced modulator followed by a filter. Balanced modulator creates DSB, filter removes one sideband. For amateur radio operators, this is important for SSB generation. Understanding this helps when generating SSB signals.
Why Other Answers Are Wrong
Option B: Incorrect. Use reactance modulator followed by mixer isn't SSB - SSB uses balanced modulator followed by filter. Reactance modulator isn't SSB. Option C: Incorrect. Use loop modulator followed by mixer isn't SSB - SSB uses balanced modulator followed by filter. Loop modulator isn't SSB. Option D: Incorrect. Use product detector with DSB signal isn't SSB generation - SSB uses balanced modulator followed by filter. Product detector isn't generation.
Exam Tip
Produce SSB phone signal = use balanced modulator followed by filter. Think 'S'SB = 'B'alanced 'M'odulator + 'F'ilter. Balanced modulator creates DSB, filter removes one sideband. Not reactance modulator, not loop modulator, not product detector - just balanced modulator followed by filter.
Memory Aid
Produce SSB phone signal = use balanced modulator followed by filter. Think 'S'SB = 'B'alanced 'M'odulator + 'F'ilter. Balanced modulator creates DSB, filter removes one sideband. Important for SSB generation.
Real-World Example
Producing a single-sideband phone signal: One way is to use a balanced modulator followed by a filter. The balanced modulator creates a double-sideband signal, and the filter removes one sideband. This is the method - balanced modulator followed by filter.
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.