ESSB

SSB: Single SideBand (J3E) is a refinement of amplitude modulation (AM) that more efficiently uses electrical power and bandwidth by suppression of either the upper sideband or the lower sideband as well as suppression of the carrier, resulting in only a singe sideband (SSB). Amplitude modulation (AM) produces a modulated output signal that has twice the bandwidth of the original baseband signal. Therefore, single-sideband modulation avoids this bandwidth doubling, and the power wasted on a carrier. Typical SSB audio bandwidth is less than 3kHz in audio frequency response and is designated by the FCC as J3E mode.