RiFF RAFF: Do yourself a favor and ignore the negative frequencies. Now just think of a single transmitter frequency as a very high pitch "tone." A 1 MHz tone? That can be transmitted to a remote site. But there's no information. It's just a tone. If you AM modulate it with your voice then it will widen or spread out around 1 MHz. But it spreads out to both sides equally. That's DSB. It's fine and works. But both sides aren't needed, so either one can be removed. Also, assuming the receiver knows where to look (1 MHz), you don't need the 1 MHz tone itself, either. Remove that and you have SSB.
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Comment by periblepsis on Help Explaining Single Sideband (SSB) vs. Double Sideband (DSB) Diagrams
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