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WSJT-X
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DescriptionWSJT-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. JT4, JT9, and JT65 use nearly identical message structure and source encoding (the efficient compression of standard messages used for minimal QSOs). They use timed 60-second T/R sequences synchronized with UTC. JT4 and JT65 were designed for EME ("moonbounce") on the VHF/UHF/microwave bands. JT9 is optimized for the MF and HF bands. It is about 2 dB more sensitive than JT65 while using less than 10% of the bandwidth. Q65 offers submodes with a wide range of T/R sequence lengths and tone spacings; it is highly recommended for EME, ionospheric scatter, and other weak signal work on VHF, UHF, and microwave bands. FT4 and FT8 are operationally similar but use T/R cycles only 7.5 and 15 s long, respectively. MSK144 is designed for Meteor Scatter on the VHF bands. These modes offer enhanced message formats with support for nonstandard callsigns and some popular contests. FST4 and FST4W are designed particularly for the LF and MF bands. On these bands their fundamental sensitivities are better than other WSJT-X modes with the same sequence lengths, approaching the theoretical limits for their rates of information throughput. FST4 is optimized for two-way QSOs, while FST4W is for quasi-beacon transmissions of WSPR-style messages. FST4 and FST4W do not require the strict, independent time synchronization and phase locking of modes like EbNaut. WSPR mode implements a protocol designed for probing potential propagation paths with low-power transmissions. WSPR is fully implemented within WSJT-X, including programmable "band-hopping". Latest General Availability (GA) releases: WSJT-X 2.6.1 Changes from earlier versions, and in particular from versions 2.6.0 and 2.5.4, are described in the Release Notes. Documentation: The WSJT-X 2.6.1 User Guide is available online. This document should always be your first source for help. Use your browser's search facility to find a keyword or topic.
If you plan to use FT8 DXpedition Mode, be sure to read the FT8 DXpedition Mode User Guide.
Versions of WSJT-X labeled with a "-rcx" suffix, for example WSJT-X v2.2.0-rc6, are Release Candidates sometimes offered temporarily for beta testing purposes. You should upgrade to the GA release when it becomes available. The -rc# program versions are not suitable for long-term general use. Installation packages for WSJT-X 2.6.1 Windows:
Installation instructions for Linux can be found here in the User Guide. Download the package file appropriate for your system, from the list below. (Versions installable with "apt-get" and "yum" will be made available as soon as our package maintainers create the packages.)
Macintosh macOS: Installation instructions for version 2.6.1 can be found here in the User Guide.
WSJT-X is licensed under the terms of Version 3 of the GNU General Public License (GPL). Development of this software is a cooperative project to which many amateur radio operators have contributed. If you use our code, please have the courtesy to let us know about it. If you find bugs or make improvements to the code, please report them to us in a timely fashion. Build and installation instructions are in the INSTALL file inside the tarball.
Candidate release: WSJT-X 2.7.0-rc7 Candidate releases are intended for beta testers: individuals interested in testing the program's new features and providing feedback to the WSJT Development Team. The candidate release for WSJT-X 2.7 introduces a new program called QMAP, new Special Operating Activities Q65 Pileup and SuperFox mode, an option to Update Hamlib at the click of a button, and a number of other enhancements and bug fixes. See the Release Notes for details. Further details on QMAP and Q65 Pileup mode are available in a Quick-Start guide posted here. SuperFox mode behaves operationally like the old-style Fox and Hounds mode but uses a new constant envelope waveform for Fox’s transmissions. Messages can be transmitted simultaneously to as many as 9 Hounds with no signal-strength penalty, resulting in a system gain of about +10 dB compared to the older Fox-and-Hound operation with 5 slots. Further details on SuperFox mode can be found in the SuperFox User Guide. IMPORTANT: Hounds must use WSJT-X 2.7.0-rc7 (or a later release, when available) to receive SuperFox messages. An early version of the WSJT-X 2.7.0 User Guide is available online, but you should be aware that further work on the User Guide is still in progress. Please send feedback and bug reports on this release candidate to wsjt-devel@lists.sourceforge.net. You will need to subscribe to the list in order to post there. Installation packages for WSJT-X 2.7.0-rc7 Windows:
Installation instructions for Linux can be found here in the User Guide. Download the package file appropriate for your system, from the list below.
Macintosh macOS: Installation instructions for version 2.7.0-rc7 can be found here in the User Guide.
WSJT-X is licensed under the terms of Version 3 of the GNU General Public License (GPL). Development of this software is a cooperative project to which many amateur radio operators have contributed. If you use our code, please have the courtesy to let us know about it. If you find bugs or make improvements to the code, please report them to us in a timely fashion. Build and installation instructions are in the INSTALL file inside the tarball.
©2001-2024 by
Joe Taylor, K1JT
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