Which of the following can be measured with an antenna analyzer?
The correct answer is D: All these choices are correct. Which of the following can be measured with an antenna analyzer includes: velocity factor, cable length, and resonant frequency of a tuned circuit. All three can be measured with antenna analyzers. For amateur radio operators, this is important for test equipment. Understanding this helps when using antenna analyzers.
Exam Tip
All three can be measured with antenna analyzer: velocity factor, cable length, resonant frequency. When all listed parameters can be measured with antenna analyzers, 'all of the above' is usually the answer. All are valid antenna analyzer measurements.
Memory Aid
"All three can be measured with antenna analyzer: Velocity factor, Cable length, Resonant frequency. Think 'A'll 'A'ntenna 'A'nalyzer measurements. All three are valid antenna analyzer measurements. Important for test equipment."
Real-World Application
An antenna analyzer: It can measure velocity factor (by measuring electrical length vs physical length), cable length (by measuring delay), and resonant frequency of a tuned circuit (by finding minimum SWR). All three can be measured. This is what can be measured - all these parameters.
Key Concepts
Why Other Options Are Wrong
Option A: While correct, this is incomplete. Cable length and resonant frequency can also be measured.
Option B: While correct, this is incomplete. Velocity factor and resonant frequency can also be measured.
Option C: While correct, this is incomplete. Velocity factor and cable length can also be measured.
题目解析
The correct answer is D: All these choices are correct. Which of the following can be measured with an antenna analyzer includes: velocity factor, cable length, and resonant frequency of a tuned circuit. All three can be measured with antenna analyzers. For amateur radio operators, this is important for test equipment. Understanding this helps when using antenna analyzers.
考试技巧
All three can be measured with antenna analyzer: velocity factor, cable length, resonant frequency. When all listed parameters can be measured with antenna analyzers, 'all of the above' is usually the answer. All are valid antenna analyzer measurements.
记忆口诀
All three can be measured with antenna analyzer: Velocity factor, Cable length, Resonant frequency. Think 'A'll 'A'ntenna 'A'nalyzer measurements. All three are valid antenna analyzer measurements. Important for test equipment.
实际应用示例
An antenna analyzer: It can measure velocity factor (by measuring electrical length vs physical length), cable length (by measuring delay), and resonant frequency of a tuned circuit (by finding minimum SWR). All three can be measured. This is what can be measured - all these parameters.
错误选项分析
Option A: While correct, this is incomplete. Cable length and resonant frequency can also be measured. Option B: While correct, this is incomplete. Velocity factor and resonant frequency can also be measured. Option C: While correct, this is incomplete. Velocity factor and cable length can also be measured.
知识点
Antenna analyzer, Velocity factor, Cable length, Resonant frequency
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.