Could anyone help me out with this question?
Sure! Could you please tell me what paper it was? I've seen it (and done it). I just want to double check!
The answer is: C A D C
C: The signal wave. This is the initial medium, in this case it is sound.
A: The carrier wave. (I'm not sure how to explain this...can someone jump in?)
D: The modulated signal. This is the signal piggybacking, or being superimposed on the medium of transmission. (This could be through a Laser Diode sending, and a Photodiode receiving).
C: The signal wave. This is the output, again sound, only it has been amplified.
I'm sure someone can explain it in more detail. Remember to put this on your summary sheet, along with a definition for modulation.