I am a HAM radio operator and I can help you regarding the Morse code and its modulation techniques .

Morse code is just like pulses , without modulation it cannot propagate . Usually we use AM modualtion technique to transmit. Single side band (SSB) is also used but it is a kind of AM modulation only with singe side band and with out carrier ...


So if you have any specific questions regarding amplitude modulation you can ask me , i will be able to help you

LAL