Which of the following digital modes is designed for EME communications?
The correct answer is D: Q65. Which of the following digital modes is designed for EME communications is Q65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. For amateur radio operators, this is important for EME operation. Understanding this helps when operating EME.
Exam Tip
EME digital mode = Q65. Think 'E'ME = 'Q'65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. Not MSK144, not PACTOR III, not WSPR - just Q65.
Memory Aid
"EME digital mode = Q65. Think 'E'ME = 'Q'65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. Important for EME operation."
Real-World Application
EME (Earth-Moon-Earth) communications: Q65 is a digital mode specifically designed for EME. It's optimized for very weak signals over the long distance to the moon and back. This is the mode - Q65 is designed for EME communications.
Key Concepts
Why Other Options Are Wrong
Option A (MSK144): Incorrect. MSK144 is for meteor scatter, not EME - Q65 is for EME. MSK144 isn't for EME.
Option B (PACTOR III): Incorrect. PACTOR III is for HF data, not EME - Q65 is for EME. PACTOR III isn't for EME.
Option C (WSPR): Incorrect. WSPR is for weak signal propagation reporting, not EME - Q65 is for EME. WSPR isn't for EME.
题目解析
The correct answer is D: Q65. Which of the following digital modes is designed for EME communications is Q65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. For amateur radio operators, this is important for EME operation. Understanding this helps when operating EME.
考试技巧
EME digital mode = Q65. Think 'E'ME = 'Q'65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. Not MSK144, not PACTOR III, not WSPR - just Q65.
记忆口诀
EME digital mode = Q65. Think 'E'ME = 'Q'65. Q65 is specifically designed for EME (Earth-Moon-Earth) communications - very weak signals over long distances. Important for EME operation.
实际应用示例
EME (Earth-Moon-Earth) communications: Q65 is a digital mode specifically designed for EME. It's optimized for very weak signals over the long distance to the moon and back. This is the mode - Q65 is designed for EME communications.
错误选项分析
Option A (MSK144): Incorrect. MSK144 is for meteor scatter, not EME - Q65 is for EME. MSK144 isn't for EME. Option B (PACTOR III): Incorrect. PACTOR III is for HF data, not EME - Q65 is for EME. PACTOR III isn't for EME. Option C (WSPR): Incorrect. WSPR is for weak signal propagation reporting, not EME - Q65 is for EME. WSPR isn't for EME.
知识点
Digital modes, EME communications, Q65, Earth-Moon-Earth
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.