Which of the following digital modes is designed for meteor scatter communications?
The correct answer is B: MSK144. Which of the following digital modes is designed for meteor scatter communications is MSK144. MSK144 is specifically designed for meteor scatter - very short bursts of communication. For amateur radio operators, this is important for meteor scatter operation. Understanding this helps when operating meteor scatter.
Exam Tip
Meteor scatter digital mode = MSK144. Think 'M'eteor 'S'catter = 'M'SK144. MSK144 is specifically designed for meteor scatter - very short bursts of communication. Not WSPR, not Hellschreiber, not APRS - just MSK144.
Memory Aid
"Meteor scatter digital mode = MSK144. Think 'M'eteor 'S'catter = 'M'SK144. MSK144 is specifically designed for meteor scatter - very short bursts of communication. Important for meteor scatter operation."
Real-World Application
Meteor scatter communications: MSK144 is a digital mode specifically designed for meteor scatter. It uses very short transmission bursts (144 milliseconds) optimized for the brief reflections from meteor trails. This is the mode - MSK144 is designed for meteor scatter communications.
Key Concepts
Why Other Options Are Wrong
Option A (WSPR): Incorrect. WSPR is for weak signal propagation reporting, not meteor scatter - MSK144 is for meteor scatter. WSPR isn't for meteor scatter.
Option C (Hellschreiber): Incorrect. Hellschreiber is a facsimile mode, not specifically for meteor scatter - MSK144 is for meteor scatter. Hellschreiber isn't for meteor scatter.
Option D (APRS): Incorrect. APRS is for position reporting, not meteor scatter - MSK144 is for meteor scatter. APRS isn't for meteor scatter.
题目解析
The correct answer is B: MSK144. Which of the following digital modes is designed for meteor scatter communications is MSK144. MSK144 is specifically designed for meteor scatter - very short bursts of communication. For amateur radio operators, this is important for meteor scatter operation. Understanding this helps when operating meteor scatter.
考试技巧
Meteor scatter digital mode = MSK144. Think 'M'eteor 'S'catter = 'M'SK144. MSK144 is specifically designed for meteor scatter - very short bursts of communication. Not WSPR, not Hellschreiber, not APRS - just MSK144.
记忆口诀
Meteor scatter digital mode = MSK144. Think 'M'eteor 'S'catter = 'M'SK144. MSK144 is specifically designed for meteor scatter - very short bursts of communication. Important for meteor scatter operation.
实际应用示例
Meteor scatter communications: MSK144 is a digital mode specifically designed for meteor scatter. It uses very short transmission bursts (144 milliseconds) optimized for the brief reflections from meteor trails. This is the mode - MSK144 is designed for meteor scatter communications.
错误选项分析
Option A (WSPR): Incorrect. WSPR is for weak signal propagation reporting, not meteor scatter - MSK144 is for meteor scatter. WSPR isn't for meteor scatter. Option C (Hellschreiber): Incorrect. Hellschreiber is a facsimile mode, not specifically for meteor scatter - MSK144 is for meteor scatter. Hellschreiber isn't for meteor scatter. Option D (APRS): Incorrect. APRS is for position reporting, not meteor scatter - MSK144 is for meteor scatter. APRS isn't for meteor scatter.
知识点
Digital modes, Meteor scatter communications, MSK144, Meteor scatter
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.