What is the maximum permissible duration of a remotely controlled station’s transmissions if its control link malfunctions?
The correct answer is B: 3 minutes. The maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions is 3 minutes. If the control link fails, the station must stop transmitting within 3 minutes. For amateur radio operators, this is important for remote control operation. Understanding this helps ensure legal remote control operation.
Exam Tip
Remote control malfunction = maximum 3 minutes transmission. Think 'R'emote 'C'ontrol 'M'alfunction = '3' 'M'inutes maximum. If control link fails, station must stop transmitting within 3 minutes. Not 30 seconds, not 5 minutes, not 10 minutes - just 3 minutes.
Memory Aid
"Remote control malfunction = maximum 3 minutes transmission. Think 'R'emote 'C'ontrol 'M'alfunction = '3' 'M'inutes. If control link fails, station must stop transmitting within 3 minutes. Important for remote control operation."
Real-World Application
A remotely controlled station: If the control link malfunctions (connection lost), the station can continue transmitting for a maximum of 3 minutes. After 3 minutes, it must stop transmitting. This prevents stations from transmitting indefinitely if control is lost. 3 minutes is the maximum permissible duration - this is the requirement.
FCC Part 97.213Key Concepts
Why Other Options Are Wrong
Option A (30 seconds): Incorrect. 30 seconds is too short - the maximum is 3 minutes, not 30 seconds. 30 seconds is too short.
Option C (5 minutes): Incorrect. 5 minutes is too long - the maximum is 3 minutes, not 5 minutes. 5 minutes is too long.
Option D (10 minutes): Incorrect. 10 minutes is way too long - the maximum is 3 minutes, not 10 minutes. 10 minutes is too long.
题目解析
The correct answer is B: 3 minutes. The maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions is 3 minutes. If the control link fails, the station must stop transmitting within 3 minutes. For amateur radio operators, this is important for remote control operation. Understanding this helps ensure legal remote control operation.
考试技巧
Remote control malfunction = maximum 3 minutes transmission. Think 'R'emote 'C'ontrol 'M'alfunction = '3' 'M'inutes maximum. If control link fails, station must stop transmitting within 3 minutes. Not 30 seconds, not 5 minutes, not 10 minutes - just 3 minutes.
记忆口诀
Remote control malfunction = maximum 3 minutes transmission. Think 'R'emote 'C'ontrol 'M'alfunction = '3' 'M'inutes. If control link fails, station must stop transmitting within 3 minutes. Important for remote control operation.
实际应用示例
A remotely controlled station: If the control link malfunctions (connection lost), the station can continue transmitting for a maximum of 3 minutes. After 3 minutes, it must stop transmitting. This prevents stations from transmitting indefinitely if control is lost. 3 minutes is the maximum permissible duration - this is the requirement.
错误选项分析
Option A (30 seconds): Incorrect. 30 seconds is too short - the maximum is 3 minutes, not 30 seconds. 30 seconds is too short. Option C (5 minutes): Incorrect. 5 minutes is too long - the maximum is 3 minutes, not 5 minutes. 5 minutes is too long. Option D (10 minutes): Incorrect. 10 minutes is way too long - the maximum is 3 minutes, not 10 minutes. 10 minutes is too long.
知识点
Remotely controlled station, Control link malfunction, 3 minutes, Maximum transmission duration
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.