Amateur radio

See also (modulation and signalling formats)

• ACARS, used by commercial avation -- packet based
• CLOVER2000
• COQUELET, also referred to generically as Polytone
• Hellschriber, a FAX-RTTY hybrid
• MFSK
• MT63, used by Hams and some government agencies
• NAVTEX, used my maritime navigation
• PACTOR, a packet SITOR variant
• PICCOLO, also referred to generically as Polytone
• PSK31 & PSK63
• Sailmail, a commercial HF mail system run by hams
• Slow-scan television
• SITOR, an RTTY variant with error control.
• TV-FM DX
• Q code
• Q15X25, a HAM created packet format