What output is produced by a balanced modulator?

A balanced modulator is a specialized circuit used primarily in the generation of Single Sideband (SSB) signals. Its main job in the transmitter is to combine the input audio signal with the radio frequency (RF) carrier. By design, the balanced modulator suppresses the original RF carrier while passing the sum and difference frequencies created during the mixing process. These sum and difference frequencies are known as the upper and lower sidebands. Because the carrier is successfully suppressed but both sidebands remain intact, the direct output is a double-sideband suppressed-carrier (DSB-SC) RF signal. It is not an audio signal, nor is it frequency modulated (FM).