Which of these digital modes does not support keyboard-to-keyboard operation?
The correct answer is A: WSPR. Which of these digital modes does not support keyboard-to-keyboard operation is WSPR. WSPR is a beacon mode, not interactive. For amateur radio operators, this is important for understanding digital modes. Understanding this helps when selecting digital modes.
Exam Tip
Digital mode without keyboard-to-keyboard = WSPR. Think 'W'SPR = 'W'eak 'S'ignal 'P'ropagation 'R'eporting (beacon, not interactive). WSPR is a beacon mode, not interactive. Not RTTY, not PSK31, not MFSK16 - just WSPR.
Memory Aid
"Digital mode without keyboard-to-keyboard = WSPR. Think 'W'SPR = 'B'eacon mode. WSPR is a beacon mode, not interactive. Important for understanding digital modes."
Real-World Application
Digital modes: RTTY, PSK31, and MFSK16 all support keyboard-to-keyboard operation - you can type messages back and forth. WSPR is different - it's a beacon mode that just transmits your call sign, location, and power level. There's no keyboard-to-keyboard operation with WSPR. This is the mode - WSPR doesn't support keyboard-to-keyboard operation.
Key Concepts
Why Other Options Are Wrong
Option B (RTTY): Incorrect. RTTY supports keyboard-to-keyboard operation - WSPR doesn't. RTTY supports it.
Option C (PSK31): Incorrect. PSK31 supports keyboard-to-keyboard operation - WSPR doesn't. PSK31 supports it.
Option D (MFSK16): Incorrect. MFSK16 supports keyboard-to-keyboard operation - WSPR doesn't. MFSK16 supports it.
题目解析
The correct answer is A: WSPR. Which of these digital modes does not support keyboard-to-keyboard operation is WSPR. WSPR is a beacon mode, not interactive. For amateur radio operators, this is important for understanding digital modes. Understanding this helps when selecting digital modes.
考试技巧
Digital mode without keyboard-to-keyboard = WSPR. Think 'W'SPR = 'W'eak 'S'ignal 'P'ropagation 'R'eporting (beacon, not interactive). WSPR is a beacon mode, not interactive. Not RTTY, not PSK31, not MFSK16 - just WSPR.
记忆口诀
Digital mode without keyboard-to-keyboard = WSPR. Think 'W'SPR = 'B'eacon mode. WSPR is a beacon mode, not interactive. Important for understanding digital modes.
实际应用示例
Digital modes: RTTY, PSK31, and MFSK16 all support keyboard-to-keyboard operation - you can type messages back and forth. WSPR is different - it's a beacon mode that just transmits your call sign, location, and power level. There's no keyboard-to-keyboard operation with WSPR. This is the mode - WSPR doesn't support keyboard-to-keyboard operation.
错误选项分析
Option B (RTTY): Incorrect. RTTY supports keyboard-to-keyboard operation - WSPR doesn't. RTTY supports it. Option C (PSK31): Incorrect. PSK31 supports keyboard-to-keyboard operation - WSPR doesn't. PSK31 supports it. Option D (MFSK16): Incorrect. MFSK16 supports keyboard-to-keyboard operation - WSPR doesn't. MFSK16 supports it.
知识点
Digital modes, Keyboard-to-keyboard operation, WSPR, Beacon mode
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.