How does Q65 differ from JT65?
The correct answer is C: Multiple receive cycles are averaged. How does Q65 differ from JT65 is that multiple receive cycles are averaged. Q65 averages multiple receive cycles for better decoding. For amateur radio operators, this is important for understanding Q65. Understanding this helps when operating Q65.
Exam Tip
Q65 vs JT65 difference = multiple receive cycles are averaged. Think 'Q'65 = 'Q'uality improved by 'A'veraging. Q65 averages multiple receive cycles for better decoding. Not keyboard-to-keyboard, not quadrature modulation - just multiple cycles averaged.
Memory Aid
"Q65 vs JT65 difference = multiple receive cycles are averaged. Think 'Q'65 = 'A'veraging. Q65 averages multiple receive cycles for better decoding. Important for understanding Q65."
Real-World Application
Q65 compared to JT65: Q65 differs in that multiple receive cycles are averaged. This averaging improves decoding performance, especially for very weak signals. JT65 doesn't average cycles - it processes each cycle independently. This is the difference - Q65 averages multiple receive cycles.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Keyboard-to-keyboard operation isn't the difference - neither Q65 nor JT65 support keyboard-to-keyboard. Keyboard-to-keyboard isn't the difference.
Option B: Incorrect. Quadrature modulation isn't the difference - both use similar modulation. Quadrature modulation isn't the difference.
Option D: Incorrect. Since A and B are not correct, 'all of the above' cannot be correct. Only multiple receive cycles averaged is the difference.
题目解析
The correct answer is C: Multiple receive cycles are averaged. How does Q65 differ from JT65 is that multiple receive cycles are averaged. Q65 averages multiple receive cycles for better decoding. For amateur radio operators, this is important for understanding Q65. Understanding this helps when operating Q65.
考试技巧
Q65 vs JT65 difference = multiple receive cycles are averaged. Think 'Q'65 = 'Q'uality improved by 'A'veraging. Q65 averages multiple receive cycles for better decoding. Not keyboard-to-keyboard, not quadrature modulation - just multiple cycles averaged.
记忆口诀
Q65 vs JT65 difference = multiple receive cycles are averaged. Think 'Q'65 = 'A'veraging. Q65 averages multiple receive cycles for better decoding. Important for understanding Q65.
实际应用示例
Q65 compared to JT65: Q65 differs in that multiple receive cycles are averaged. This averaging improves decoding performance, especially for very weak signals. JT65 doesn't average cycles - it processes each cycle independently. This is the difference - Q65 averages multiple receive cycles.
错误选项分析
Option A: Incorrect. Keyboard-to-keyboard operation isn't the difference - neither Q65 nor JT65 support keyboard-to-keyboard. Keyboard-to-keyboard isn't the difference. Option B: Incorrect. Quadrature modulation isn't the difference - both use similar modulation. Quadrature modulation isn't the difference. Option D: Incorrect. Since A and B are not correct, 'all of the above' cannot be correct. Only multiple receive cycles averaged is the difference.
知识点
Q65, JT65, Multiple receive cycles, Averaged
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.