Master the Waves: Ham Radio Extra Class 2026 Practice Test – Tune In and Transmit Success!

Digital modes such as PSK31 indeed use phase-shift keying (PSK) for data transmission. PSK is a modulation scheme where data is conveyed by varying the phase of the carrier wave. In the case of PSK31, it is specifically designed for keyboard-to-keyboard communication, making it highly efficient for transmitting text over radio frequencies. This mode allows for effective communication even at low power levels and bandwidth, as it transmits information in a compressed format.

Understanding the propagation characteristics and interaction of digital modes with the radio spectrum enhances their appeal among amateurs, as they can achieve reliable communication over varying distances without the need for specialized infrastructure. This capability distinguishes PSK31 and similar digital modes from communication systems that require different technologies or setups.