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The funny thing about trying to define AM is that technically speaking SSB is AM.;)  It is an amplitude modulated signal. That would also include all those computer sound card modes like RTTY and even PSK too. This is why you need to fully define the type of AM that it is. Normally what we refer to as AM is defined as double sideband full  carrier. There is also double sideband reduced carrer,  double sideband supressed carrier, independent sideband and single sideband.


http://www.radio-electronics.com/info/rf-technology-design/am-amplitude-modulation/what-is-am-tutorial.php