WSJT-X implements communication protocols or "modes" called JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon. Modes used for VHF/UHF and microwave operation
#JT65 BANDWIDTH CODE#
A Reed Solomon (63,12) error-control code converts 72-bit user messages into sequences of 63 six-bit information-carrying symbols. The author labled this mode as a 65-FSK modulation so this is why it is under FSKĪ detailed description of the JT65 protocol was published in QEX for September-October, 2005.