What does the Q signal “QRL?” mean?
The correct answer is D: 'Are you busy?' or 'Is this frequency in use?'. The Q signal 'QRL?' means 'Are you busy?' or 'Is this frequency in use?'. This is used to check if a frequency is occupied before using it. For amateur radio operators, this is the standard way to check frequency availability. Understanding this helps ensure proper frequency selection and prevents interference.
Exam Tip
QRL? = Are you busy? / Is frequency in use? Think 'Q'RL? = 'Q'uery if 'R'adio 'L'ine is busy. Used to check if a frequency is occupied before using it. Not about keeping clear, break-in, or specific stations - just frequency availability.
Memory Aid
"QRL? = Are you busy? / Is frequency in use? Think 'Q'RL? = 'Q'uery if 'R'adio 'L'ine is busy. Standard way to check if frequency is occupied. Used before calling CQ or starting a contact."
Real-World Application
You want to use a frequency but want to check if it's in use. You send 'QRL?' on CW or ask 'Is this frequency in use?' on phone. If someone responds, the frequency is busy. If no response, it's likely clear. This is the standard way to check frequency availability.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. 'QRL?' doesn't mean 'will you keep the frequency clear' - that's not a standard Q signal meaning. QRL? is about checking if frequency is in use.
Option B: Incorrect. 'QRL?' doesn't mean 'are you operating full break-in' - that's QSK. QRL? is about frequency availability.
Option C: Incorrect. 'QRL?' doesn't mean 'are you listening only for a specific station' - that's what 'KN' means. QRL? is about frequency availability.
题目解析
The correct answer is D: 'Are you busy?' or 'Is this frequency in use?'. The Q signal 'QRL?' means 'Are you busy?' or 'Is this frequency in use?'. This is used to check if a frequency is occupied before using it. For amateur radio operators, this is the standard way to check frequency availability. Understanding this helps ensure proper frequency selection and prevents interference.
考试技巧
QRL? = Are you busy? / Is frequency in use? Think 'Q'RL? = 'Q'uery if 'R'adio 'L'ine is busy. Used to check if a frequency is occupied before using it. Not about keeping clear, break-in, or specific stations - just frequency availability.
记忆口诀
QRL? = Are you busy? / Is frequency in use? Think 'Q'RL? = 'Q'uery if 'R'adio 'L'ine is busy. Standard way to check if frequency is occupied. Used before calling CQ or starting a contact.
实际应用示例
You want to use a frequency but want to check if it's in use. You send 'QRL?' on CW or ask 'Is this frequency in use?' on phone. If someone responds, the frequency is busy. If no response, it's likely clear. This is the standard way to check frequency availability.
错误选项分析
Option A: Incorrect. 'QRL?' doesn't mean 'will you keep the frequency clear' - that's not a standard Q signal meaning. QRL? is about checking if frequency is in use. Option B: Incorrect. 'QRL?' doesn't mean 'are you operating full break-in' - that's QSK. QRL? is about frequency availability. Option C: Incorrect. 'QRL?' doesn't mean 'are you listening only for a specific station' - that's what 'KN' means. QRL? is about frequency availability.
知识点
QRL?, Q signals, Frequency checking, Operating procedures
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.