Question
What does the abbreviation “PSK” mean?
Answer Options
- A) Pulse Shift Keying
- B) Phase Shift Keying
- C) Packet Short Keying
- D) Phased Slide Keying
Correct Answer: B
Explanation
The abbreviation PSK stands for Phase Shift Keying. This is a popular family of digital modes used on the HF bands, the most common being \text{PSK31}.
PSK works by shifting the phase of the carrier wave in a controlled way to represent the binary data (ones and zeros) being transmitted. This method is highly effective for sending text-based messages, particularly in weak signal environments, and requires a very narrow bandwidth.
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