Which of the following can be measured with an antenna analyzer?
The correct answer is C: Impedance of coaxial cable. What can be measured with an antenna analyzer is impedance of coaxial cable. Antenna analyzers measure impedance, which can be used for antennas, feed lines, or other components. For amateur radio operators, this is a primary function of antenna analyzers. Understanding this helps when using analyzers.
Exam Tip
Antenna analyzer measures = impedance of coaxial cable. Think 'A'ntenna 'A'nalyzer = 'A'nalyzes 'A'impedance. Measures impedance, which can be used for antennas, feed lines, or other components. Not front-to-back ratio, not power output, not gain - just impedance.
Memory Aid
"Antenna analyzer measures = impedance of coaxial cable. Think 'A'ntenna 'A'nalyzer = 'A'nalyzes 'A'impedance. Measures impedance of antennas, feed lines, or other components. Primary function of antenna analyzers."
Real-World Application
You want to check the impedance of a coaxial cable. You connect an antenna analyzer to the cable. The analyzer measures the impedance (e.g., 50 ohms, 75 ohms, or other values). Antenna analyzers are excellent for measuring impedance of cables, antennas, and other components.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Antenna analyzers don't measure front-to-back ratio - that requires measuring signal strength from different directions. Front-to-back ratio needs field strength measurements.
Option B: Incorrect. Antenna analyzers don't measure transmitter power output - that requires power meters. Power measurement is different from impedance.
Option D: Incorrect. Antenna analyzers don't measure antenna gain - that requires field strength measurements and comparisons. Gain measurement is different.
题目解析
The correct answer is C: Impedance of coaxial cable. What can be measured with an antenna analyzer is impedance of coaxial cable. Antenna analyzers measure impedance, which can be used for antennas, feed lines, or other components. For amateur radio operators, this is a primary function of antenna analyzers. Understanding this helps when using analyzers.
考试技巧
Antenna analyzer measures = impedance of coaxial cable. Think 'A'ntenna 'A'nalyzer = 'A'nalyzes 'A'impedance. Measures impedance, which can be used for antennas, feed lines, or other components. Not front-to-back ratio, not power output, not gain - just impedance.
记忆口诀
Antenna analyzer measures = impedance of coaxial cable. Think 'A'ntenna 'A'nalyzer = 'A'nalyzes 'A'impedance. Measures impedance of antennas, feed lines, or other components. Primary function of antenna analyzers.
实际应用示例
You want to check the impedance of a coaxial cable. You connect an antenna analyzer to the cable. The analyzer measures the impedance (e.g., 50 ohms, 75 ohms, or other values). Antenna analyzers are excellent for measuring impedance of cables, antennas, and other components.
错误选项分析
Option A: Incorrect. Antenna analyzers don't measure front-to-back ratio - that requires measuring signal strength from different directions. Front-to-back ratio needs field strength measurements. Option B: Incorrect. Antenna analyzers don't measure transmitter power output - that requires power meters. Power measurement is different from impedance. Option D: Incorrect. Antenna analyzers don't measure antenna gain - that requires field strength measurements and comparisons. Gain measurement is different.
知识点
Antenna analyzer, Impedance measurement, Coaxial cable, Impedance
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.