Ham Radio Extra Class Practice Test 2026 – Complete Exam Prep

The characteristic of SSB (Single Sideband) transmission that is highlighted is its greater power efficiency compared to AM (Amplitude Modulation). SSB is a refinement of AM that eliminates one of the sidebands and the carrier, which allows for a more efficient use of power. In AM transmission, a significant portion of the transmitted power is used to send the carrier signal, which is not necessary for SSB operations. In SSB, since the carrier is not transmitted, the power that would have gone to this carrier can instead be focused on the remaining sideband, improving the overall efficiency of power usage.

Additionally, because SSB uses less bandwidth than standard AM transmission, this allows for more effective use of available frequencies, especially in crowded communication bands. This efficient use of power and bandwidth makes SSB particularly advantageous for long-distance communications, especially in amateur radio, where maximizing signal strength and clarity is crucial.