Question
Which of these digital modes does not support keyboard-to-keyboard operation?
Answer Options
- A) WSPR
- B) RTTY
- C) PSK31
- D) MFSK16
Correct Answer: A
Explanation
Keyboard-to-keyboard operation is the ability to type a message directly and have it transmitted and displayed in real-time on the receiving station’s screen, facilitating a typical conversational exchange (like RTTY or PSK31). However, not all digital modes are designed for conversational use; some are intended solely for data collection and testing propagation paths.
WSPR (Weak Signal Propagation Reporter) is a mode that does not support keyboard-to-keyboard operation. WSPR is designed for automated testing of radio propagation paths; it transmits very short, fixed-format messages (call sign, locator, power level) and relies on receiving stations to automatically decode and report the reception data to a central database. It is strictly an automated beacon mode.
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