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Digital modes
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Amateur radio
digital modes
Frequency-shift keying (FSK)
RTTY
AMTOR
/
SITOR
PACTOR
CLOVER2000
Packet radio
(
Bell 103
Bell 202
)
M17
Multiple frequency-shift keying (MFSK)
Olivia MFSK
Contestia
JT65
FSK441
JT6M
WSPR
FT8
Phase-shift keying (PSK)
PSK31
PSK63
Q15X25
COFDM
MT63
(based on PSK)
Non-traditional digital modes
Hellschreiber (Feld-Hell)
On-off keying
Continuous wave
Modulated continuous wave
Pulse modulation
Frequency-hopping Spread Spectrum (FHSS)
Direct Sequence Spread Spectrum (DSSS)
AMPRNet
DAPNET