Which of the following is an advantage of an oscilloscope versus a digital voltmeter?
The correct answer is D: Complex waveforms can be measured. An advantage of an oscilloscope versus a digital voltmeter is that complex waveforms can be measured. Oscilloscopes display waveforms visually, allowing you to see complex signals, while voltmeters only show numbers. For amateur radio operators, oscilloscopes are essential for viewing signal characteristics. Understanding this helps when selecting test equipment.
Exam Tip
Oscilloscope advantage = complex waveforms can be measured. Think 'O'scilloscope = 'O'bserves 'C'omplex waveforms. Oscilloscopes display waveforms visually, allowing you to see complex signals. Not less power, not impedance measurement, not greater precision - just waveform visualization.
Memory Aid
"Oscilloscope advantage = complex waveforms can be measured. Think 'O'scilloscope = 'O'bserves 'C'omplex waveforms. Oscilloscopes display waveforms visually, allowing you to see complex signals. Essential for waveform analysis."
Real-World Application
You want to see the shape of a modulated signal. An oscilloscope displays the waveform visually, showing you the modulation envelope, distortion, and other characteristics. A voltmeter only shows a number - it can't show you the waveform shape. Oscilloscopes are essential for viewing complex signals.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Oscilloscopes don't use less power - they typically use more power than voltmeters. Power consumption isn't an advantage.
Option B: Incorrect. Oscilloscopes don't easily measure complex impedances - that requires specialized equipment. Impedance measurement isn't an oscilloscope advantage.
Option C: Incorrect. Oscilloscopes don't have greater precision than voltmeters - voltmeters are often more precise for voltage measurements. Precision isn't the advantage.
题目解析
The correct answer is D: Complex waveforms can be measured. An advantage of an oscilloscope versus a digital voltmeter is that complex waveforms can be measured. Oscilloscopes display waveforms visually, allowing you to see complex signals, while voltmeters only show numbers. For amateur radio operators, oscilloscopes are essential for viewing signal characteristics. Understanding this helps when selecting test equipment.
考试技巧
Oscilloscope advantage = complex waveforms can be measured. Think 'O'scilloscope = 'O'bserves 'C'omplex waveforms. Oscilloscopes display waveforms visually, allowing you to see complex signals. Not less power, not impedance measurement, not greater precision - just waveform visualization.
记忆口诀
Oscilloscope advantage = complex waveforms can be measured. Think 'O'scilloscope = 'O'bserves 'C'omplex waveforms. Oscilloscopes display waveforms visually, allowing you to see complex signals. Essential for waveform analysis.
实际应用示例
You want to see the shape of a modulated signal. An oscilloscope displays the waveform visually, showing you the modulation envelope, distortion, and other characteristics. A voltmeter only shows a number - it can't show you the waveform shape. Oscilloscopes are essential for viewing complex signals.
错误选项分析
Option A: Incorrect. Oscilloscopes don't use less power - they typically use more power than voltmeters. Power consumption isn't an advantage. Option B: Incorrect. Oscilloscopes don't easily measure complex impedances - that requires specialized equipment. Impedance measurement isn't an oscilloscope advantage. Option C: Incorrect. Oscilloscopes don't have greater precision than voltmeters - voltmeters are often more precise for voltage measurements. Precision isn't the advantage.
知识点
Oscilloscope, Complex waveforms, Digital voltmeter, Waveform measurement
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.