What type of instrument can be used to accurately measure an RF field strength?
The correct answer is B: A calibrated field strength meter with a calibrated antenna. The type of instrument that can be used to accurately measure an RF field strength is a calibrated field strength meter with a calibrated antenna. Accurate RF field measurements require calibrated equipment. For amateur radio operators, this is essential for RF exposure evaluation. Understanding this helps ensure accurate measurements.
Exam Tip
Accurate RF field strength measurement = calibrated field strength meter with calibrated antenna. Think 'A'ccurate 'M'easurement = 'A'ppropriate 'M'eter (calibrated). Accurate RF field measurements require calibrated equipment. Not DSP receiver, not SWR meter, not oscilloscope - just calibrated field strength meter.
Memory Aid
"Accurate RF field strength measurement = calibrated field strength meter with calibrated antenna. Think 'A'ccurate 'M'easurement = 'C'alibrated 'M'eter. Accurate RF field measurements require calibrated equipment. Essential for RF exposure evaluation."
Real-World Application
RF field strength measurement: A calibrated field strength meter with a calibrated antenna is used to accurately measure RF field strength. The meter and antenna must be calibrated to ensure accurate readings. This is essential for RF exposure evaluation - you need accurate measurements to determine compliance. This is the instrument for accurate RF field strength measurement.
FCC Part 97.13, FCC OET Bulletin 65Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Receiver with DSP noise reduction isn't for field strength measurement - it's for receiving signals, not measuring field strength. DSP receiver isn't the instrument.
Option C: Incorrect. SWR meter with peak-reading function isn't for field strength measurement - it measures SWR, not field strength. SWR meter isn't the instrument.
Option D: Incorrect. Oscilloscope with crystal marker isn't for field strength measurement - it's for waveform display, not field strength. Oscilloscope isn't the instrument.
题目解析
The correct answer is B: A calibrated field strength meter with a calibrated antenna. The type of instrument that can be used to accurately measure an RF field strength is a calibrated field strength meter with a calibrated antenna. Accurate RF field measurements require calibrated equipment. For amateur radio operators, this is essential for RF exposure evaluation. Understanding this helps ensure accurate measurements.
考试技巧
Accurate RF field strength measurement = calibrated field strength meter with calibrated antenna. Think 'A'ccurate 'M'easurement = 'A'ppropriate 'M'eter (calibrated). Accurate RF field measurements require calibrated equipment. Not DSP receiver, not SWR meter, not oscilloscope - just calibrated field strength meter.
记忆口诀
Accurate RF field strength measurement = calibrated field strength meter with calibrated antenna. Think 'A'ccurate 'M'easurement = 'C'alibrated 'M'eter. Accurate RF field measurements require calibrated equipment. Essential for RF exposure evaluation.
实际应用示例
RF field strength measurement: A calibrated field strength meter with a calibrated antenna is used to accurately measure RF field strength. The meter and antenna must be calibrated to ensure accurate readings. This is essential for RF exposure evaluation - you need accurate measurements to determine compliance. This is the instrument for accurate RF field strength measurement.
错误选项分析
Option A: Incorrect. Receiver with DSP noise reduction isn't for field strength measurement - it's for receiving signals, not measuring field strength. DSP receiver isn't the instrument. Option C: Incorrect. SWR meter with peak-reading function isn't for field strength measurement - it measures SWR, not field strength. SWR meter isn't the instrument. Option D: Incorrect. Oscilloscope with crystal marker isn't for field strength measurement - it's for waveform display, not field strength. Oscilloscope isn't the instrument.
知识点
RF field strength measurement, Calibrated field strength meter, Calibrated antenna, Accurate measurement
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.