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what is "asymmetrical modulation" ?

connect an AM transmitter to a scope and feed a 30mv. 1khz. tone into the mic. input and look at the scope. with respect to the ensuing pattern you can flip it, slide it or turn it and the "shape" of the pattern remains the same.

that's a symmetrical signal. the pattern is a sinusoid.

you have exact correspondence of form and constituent configuration on opposite sides of a dividing line or plane. (the X & Y axis' of the scope)

symmetrical modulation types include but are not limited to FM, CW, MCW and FSK.

repeat the test again with the human voice. that's an asymmetrical signal, the pattern being anything but sinusoidal.

asymmetrical modulation types include but are not limited to AM, DSB and SSB.

[QUOTE="freecell, post: 150400, member: 30"] what is "asymmetrical modulation" ? connect an AM transmitter to a scope and feed a 30mv. 1khz. tone into the mic. input and look at the scope. with respect to the ensuing pattern you can flip it, slide it or turn it and the "shape" of the pattern remains the same. that's a symmetrical signal. the pattern is a sinusoid. you have exact correspondence of form and constituent configuration on opposite sides of a dividing line or plane. (the X & Y axis' of the scope) symmetrical modulation types include but are not limited to FM, CW, MCW and FSK. repeat the test again with the human voice. that's an asymmetrical signal, the pattern being anything but sinusoidal. asymmetrical modulation types include but are not limited to AM, DSB and SSB. [/QUOTE]

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