What transmitter performance parameter does a two-tone test analyze?
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.
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 Application
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.
Key Concepts
Why Other Options 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.
题目解析
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.
考试技巧
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.
记忆口诀
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.
实际应用示例
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.
错误选项分析
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.
知识点
Two-tone test, Linearity, Transmitter performance, Intermodulation
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.