How many sidebands are present in the J3E mode?

Correct Answer: Option B — One upper sideband.

J3E mode, or Single Sideband Suppressed Carrier, transmits only one sideband—typically the upper sideband—while the carrier is suppressed to save power. By eliminating the redundant sideband and the carrier, the transmitter concentrates all available power into the single sideband, significantly increasing the effective range of the communication.