Morse is achieved by turning the carrier on & off.
At the receiver,a Beat Frequency Oscillator is used to create an audible tone when the carrier is present.
The term "CW"as used in Amateur Radio is a historic vestige.
Spark Transmitters produced a "damped wave",so when firstly,high speed alternators,& then tube oscillators were able to produce a "Continuous Wave",although it was keyed on & off to send Morse,it was termed "CW" to distinguish it from Spark.
Hams still use the term for Morse sent in this manner,although it is inconsistent with the Engineering use of the same term.
The original use of RTTY entailed "Frequency Shift Keying",where the carrier frequency was changed in the same manner as audio tones in Long Line Machine Telegraphy.
Nowadays, RTTY in the Amateur Service is achieved by feeding Frequency Shift Keyed audio tones into SSB Transceivers.
A receiver can't tell the difference!
Apart from the original "Baudot" RTTY,we can have "ASCII",& a plethora of more modern systems.
At the receiver,a Beat Frequency Oscillator is used to create an audible tone when the carrier is present.
The term "CW"as used in Amateur Radio is a historic vestige.
Spark Transmitters produced a "damped wave",so when firstly,high speed alternators,& then tube oscillators were able to produce a "Continuous Wave",although it was keyed on & off to send Morse,it was termed "CW" to distinguish it from Spark.
Hams still use the term for Morse sent in this manner,although it is inconsistent with the Engineering use of the same term.
The original use of RTTY entailed "Frequency Shift Keying",where the carrier frequency was changed in the same manner as audio tones in Long Line Machine Telegraphy.
Nowadays, RTTY in the Amateur Service is achieved by feeding Frequency Shift Keyed audio tones into SSB Transceivers.
A receiver can't tell the difference!
Apart from the original "Baudot" RTTY,we can have "ASCII",& a plethora of more modern systems.