Which of the following is good practice when using an oscilloscope probe?
The correct answer is A: Minimize the length of the probe's ground connection. Which of the following is good practice when using an oscilloscope probe is to minimize the length of the probe's ground connection. Short ground leads reduce inductance and improve accuracy. For amateur radio operators, this is important for accurate measurements. Understanding this helps when using oscilloscopes.
Exam Tip
Oscilloscope probe good practice = minimize ground connection length. Think 'P'robe 'G'round = 'P'roperly 'G'rounded (short). Short ground leads reduce inductance and improve accuracy. Not high-impedance probe, not DC-coupled - just minimize ground length.
Memory Aid
"Oscilloscope probe good practice = minimize ground connection length. Think 'P'robe 'G'round = 'S'hort. Short ground leads reduce inductance and improve accuracy. Important for accurate measurements."
Real-World Application
Using an oscilloscope probe: Good practice is to minimize the length of the probe's ground connection. Long ground leads add inductance, which can cause ringing and measurement errors. Short ground leads provide better accuracy. This is the good practice - minimize ground connection length.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Never using high-impedance probe on low-impedance circuit isn't necessarily bad practice - minimizing ground length is more important. High-impedance probe isn't the issue.
Option C: Incorrect. Never using DC-coupled probe on AC circuit isn't bad practice - DC-coupled probes work fine on AC. DC-coupled isn't the issue.
Option D: Incorrect. Since B and C are not necessarily bad practice, 'all of the above' cannot be correct. Only minimizing ground length is the good practice.
题目解析
The correct answer is A: Minimize the length of the probe's ground connection. Which of the following is good practice when using an oscilloscope probe is to minimize the length of the probe's ground connection. Short ground leads reduce inductance and improve accuracy. For amateur radio operators, this is important for accurate measurements. Understanding this helps when using oscilloscopes.
考试技巧
Oscilloscope probe good practice = minimize ground connection length. Think 'P'robe 'G'round = 'P'roperly 'G'rounded (short). Short ground leads reduce inductance and improve accuracy. Not high-impedance probe, not DC-coupled - just minimize ground length.
记忆口诀
Oscilloscope probe good practice = minimize ground connection length. Think 'P'robe 'G'round = 'S'hort. Short ground leads reduce inductance and improve accuracy. Important for accurate measurements.
实际应用示例
Using an oscilloscope probe: Good practice is to minimize the length of the probe's ground connection. Long ground leads add inductance, which can cause ringing and measurement errors. Short ground leads provide better accuracy. This is the good practice - minimize ground connection length.
错误选项分析
Option B: Incorrect. Never using high-impedance probe on low-impedance circuit isn't necessarily bad practice - minimizing ground length is more important. High-impedance probe isn't the issue. Option C: Incorrect. Never using DC-coupled probe on AC circuit isn't bad practice - DC-coupled probes work fine on AC. DC-coupled isn't the issue. Option D: Incorrect. Since B and C are not necessarily bad practice, 'all of the above' cannot be correct. Only minimizing ground length is the good practice.
知识点
Oscilloscope probe, Good practice, Minimize ground connection length, Probe usage
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.