Amplitude Modulation Principles and Interactive Widget 

Brilliant. Much respect, Nigel. Your way of explaining these three 'techniques' in light of the underlying principle makes for an excellent understanding of signals and systems. Your talent may be needed in schools and stuff. Thank you!!

Nice job on this video, appreciate the extra work to make this easier to "see". You are a deep thinker I can tell. Keep on explaining!

Thanks! Great explanation and great tool on your website.