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AMPLITUDE MODULATION
(AM)

SINGLE SIDE BAND
(SSB)

CONTINOUS WAVE
(CW)

FREQUENCY MODULATION
(FM)

PHASE MODULATION
(PM)

WEAK SIGNAL PROPAGATION REPORTER (WSPR-X)

RADIO TELETYPE
(RTTY)

WEAK SIGNAL COMMUNICATIONS BY K1JT (WSJT-X)


JS8CALL


JT65


FT8


PACTOR

SLOW SCAN TV
(SSTV)


D-STAR


SPREAD SPECTRUM