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What is PSK
PSK = “Phase Shift Keying”
Rather than the on/off of CW or switching between two carrier frequencies (FSK as in RTTY), PSK reverses the phase of an audio tone to send information
No error correction (normally)
Takes advantage of modern digital signal processing and modern transceivers by using:
- stable transmit/receive (narrow band)
- variable length codes (no start/stop bits)