Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?

• A. Earth-Moon-Earth communications
• B. Satellite internet access
• C. Only meteor scattering
• D. Only audio streaming

Answer: (A)

The selected answer is correct because WSJT-X is specifically designed to facilitate various types of digital communication in amateur radio, with a strong emphasis on weak signal modes. Earth-Moon-Earth (EME) communications, also known as moonbounce, involves transmitting a signal to the moon and receiving the reflection back on Earth. WSJT-X includes protocols like JT65 and FT8 that are well-suited for making these long-distance, low-power contacts, allowing operators to effectively communicate over vast distances using EME techniques.

While the other options present interesting technologies and methods, they are not primarily supported by the capabilities of WSJT-X. Satellite internet access is not within the purview of amateur radio software designed for weak signal communications; it focuses more on traditional packet-switched networking rather than the unique challenges of the radio spectrum. Similarly, while meteor scattering can be a mode of communication in amateur radio, WSJT-X encompasses broader capabilities than just that specific activity. Audio streaming is generally not a feature of WSJT-X, as the software is tailored for data transmission rather than audio communication. Therefore, the robustness of WSJT-X in supporting EME communications makes it the correct answer in this scenario.