WSJT-X is a computer program designed to facilitate basic amateur radio communication using very weak signals. The first four letters in the program name stand for “Weak Signal communication by K1JT,” while the suffix “-X” indicates that WSJT-X started as an extended branch of an earlier program, WSJT, first released in 2001. WSJT-X implements communication protocols or "modes" called FST4, FST4W, FT4, FT8, JT4, JT9, JT65, Q65, MSK144, and WSPR, as well as one called Echo for detecting and measuring your own radio signals reflected from the Moon. These modes were designed for making reliable, confirmed QSOs under extreme weak-signal conditions.
What's new in 3.0.2
WSJT-X 3.0.2 is a bug-fix release. New installation packages for Windows, Linux, and macOS systems include user applications WSJT-X, MAP65, and QMAP.
Changes since release 3.0.1:
- Ham Radio Deluxe (HRD): fixes CAT-control failures reported with the 3.0.1 Windows builds, where WSJT-X could fail to communicate correctly with HRD. HRD reply handling has been made more robust while preserving compatibility with existing HRD responses.
- OmniRig: fixes setups where WSJT-X could fail to set the rig frequency at startup on slower rigs, including reports involving the FTDX-101 family.
- Transceiver Control Interface (TCI): fixes silent transmit audio for modes with transmit/receive periods other than 15 s, improves mode-change handling, and corrects split/fake-split frequency state updates.
- MAP65 and QMAP: MAP65 is again included in the release packages. MAP65 includes cross-platform modernization work, improved decoder output and audio/device handling, and fixes for JT65 live decoding and transmit audio. MAP65 and QMAP also now use writable user locations for settings and generated runtime files in packaged installs.
- Wide Graph: "Erase reference spectrum" now properly clears stale reference-spectrum correction so it no longer affects new waterfall data.
- Callsign highlighting: highlighted callsigns can now be cleared reliably, and background highlighting is correctly applied to the second callsign on a decode line.
Audible Alerts: Wanted alert sounds on Linux and macOS now follow
the Wanted alert setting rather than the DX Call alert setting.
WAV files: improves WAV/BWF file handling so malformed or truncated
recordings are handled robustly and no longer risk crashing WSJT-X.
- CloudLog: sends a versioned User-Agent with API-key tests and QSO uploads, fixing failures on hosting providers that reject requests without a User-Agent header.
- Windows: the installer now detects when WSJT-X is already running and asks you to close it before upgrading, avoiding incomplete installs caused by locked files.
- Windows: fixes clean installs where features depending on Transport Layer Security (TLS) could fail. This bug could affect features such as SuperFox verification, Update Hamlib, LoTW user-data download, eQSL, and other HTTPS downloads/uploads, such as spotting to LiveCQ.
macOS: fixes packages that could miss required data files on fresh …
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