How many sidebands are present in the J3E mode?

In the J3E mode, which is a form of single-sideband (SSB) modulation, there is only one sideband transmitted along with the carrier. Specifically, J3E indicates that only the upper sideband (USB) is used. This is characteristic of single-sideband modulation, where one of the sidebands (either upper or lower) is removed, and only one side is transmitted to optimize bandwidth and improve signal clarity. The use of J3E is particularly effective for voice communication in radio operations, as it minimizes the required bandwidth and reduces the power needed in transmission, making it efficient for maritime communication.