Deep Dive: G4B08
The correct answer is A: Linearity. The transmitter performance parameter that a two-tone test analyzes is linearity. Two-tone tests check if the transmitter produces only the two input tones and their expected products, without unwanted intermodulation products. For amateur radio operators, this indicates how linear the transmitter is. Understanding this helps when testing transmitter performance.
Why Other Answers Are Wrong
Option B: Incorrect. Two-tone tests don't analyze carrier and sideband suppression - that's tested with single-tone tests. Two-tone tests are for linearity, not suppression. Option C: Incorrect. Two-tone tests don't analyze frequency modulation percentage - that's for FM transmitters, not SSB. Two-tone tests are for SSB linearity. Option D: Incorrect. Two-tone tests don't analyze carrier phase shift - that's a different parameter. Two-tone tests are for linearity, not phase.
Exam Tip
Two-tone test analyzes = linearity. Think 'T'wo-'T'one = 'T'est 'T'ransmitter 'L'inearity. Checks if transmitter produces only expected products without unwanted intermodulation. Not suppression, not FM percentage, not phase shift - just linearity.
Memory Aid
Two-tone test analyzes = linearity. Think 'T'wo-'T'one = 'T'est 'T'ransmitter 'L'inearity. Checks if transmitter produces only expected products without unwanted intermodulation. Key performance parameter for SSB transmitters.
Real-World Example
You conduct a two-tone test. If the transmitter is linear, it produces only the two input tones and their sum/difference products. If it's non-linear, it produces unwanted intermodulation products. The two-tone test reveals how linear the transmitter is - a key performance parameter for SSB transmitters.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G4B
Reference: 2023-2027 Question Pool · G4 - Amateur Radio Practices
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G4B topic.