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NEWS
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NEWS
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Copyright 2001 - 2015 by Joe Taylor, K1JT.
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Copyright 2001 - 2015 by Joe Taylor, K1JT.
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WSJT-X v1.6.0 Release Notice
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============================
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New Features
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------------
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WSPR mode, including coordinated automatic band-hopping and a new
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two-pass decoder that can decode overlapping signals.
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EME-motivated features including JT4 (submodes A-G), Echo mode, and
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automatic Doppler tracking. The JT4 decoder is more sensitive than
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that in the latest WSJT, and message averaging is fully automated.
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(Note that submodes JT65B and JT65C are also present in Version 1.6,
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but the high-sensitivity decoder required for EME with JT65 is not yet
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included.)
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Tools for accurate frequency calibration of your radio, so you can be
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always on-frequency to within about 1 Hz.
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Mode-specific standard working frequencies accessible from the
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drop-down band selector.
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Maintenance
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-----------
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A number of corrections to the Hamlib library, fixing balky
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rig-control features. A few unreliable features peculiar to
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particular radios have been removed.
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WSJT-X v1.5.0 Release Notice
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WSJT-X v1.5.0 Release Notice
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============================
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============================
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74
README
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README
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Copyright (C) 2001 - 2015 by Joe Taylor, K1JT.
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Copyright (C) 2001 - 2015 by Joe Taylor, K1JT.
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WSJT-X implements JT9, a new mode designed especially for the LF, MF,
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WSJT-X is a computer program designed to facilitate basic amateur
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and HF bands, as well as the popular mode JT65. Both modes were
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radio communication using very weak signals. The first four letters in
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designed for making reliable, confirmed QSOs under extreme weak-signal
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the program name stand for “Weak Signal communication by K1JT,” while
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conditions. They use nearly identical message structure and source
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the suffix “-X” indicates that WSJT-X started as an extended (and
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encoding. JT65 was designed for EME (“moonbounce”) on the VHF/UHF
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experimental) branch of the program WSJT.
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bands and has also proved very effective for worldwide QRP
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communication at HF; in contrast, JT9 is optimized for HF and lower
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WSJT-X Version 1.6 offers five protocols or “modes”: JT4, JT9, JT65
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frequencies. JT9 is about 2 dB more sensitive than JT65A while using
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WSPR, and Echo. The first three are designed for making reliable QSOs
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less than 10% of the bandwidth. World-wide QSOs are possible with
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under extreme weak-signal conditions. They use nearly identical
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power levels of a few watts and compromise antennas. A 2 kHz slice of
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message structure and source encoding. JT65 was designed for EME
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spectrum is essentially full when occupied by ten JT65 signals. As
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(“moonbounce”) on the VHF/UHF bands and has also proven very effective
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many as 100 JT9 signals can fit into the same space, without overlap.
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for worldwide QRP communication on the HF bands. JT9 is optimized for
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the LF, MF, and lower HF bands. It is 2 dB more sensitive than JT65
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while using less than 10% of the bandwidth. JT4 offers a wide variety
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of tone spacings and has proved very effective for EME on microwave
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bands up to 24 GHz. All three of these modes use one-minute timed
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sequences of alternating transmission and reception, so a minimal QSO
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takes four to six minutes — two or three transmissions by each
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station, one sending in odd UTC minutes and the other even. On the HF
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bands, world-wide QSOs are possible using power levels of a few watts
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and compromise antennas. On VHF bands and higher, QSOs are possible
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(by EME and other propagation types) at signal levels 10 to 15 dB
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below those required for CW.
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WSPR (pronounced “whisper”) stands for Weak Signal Propagation
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Reporter. The WSPR protocol was designed for probing potential
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propagation paths using low-power transmissions. WSPR messages
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normally carry the transmitting station’s callsign, grid locator, and
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transmitter power in dBm, and they can be decoded at signal-to-noise
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ratios as low as -28 dB in a 2500 Hz bandwidth. WSPR users with
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internet access can automatically upload their reception reports to a
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central database called {wsprnet} that provides a mapping facility,
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archival storage, and many other features.
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Echo mode allows you to detect and measure your own lunar echoes, even
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if they are far below the audible threshold.
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WSJT-X provides spectral displays for passbands up to 5 kHz, flexible
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rig control for nearly all modern radios used by amateurs, and a wide
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variety of special aids such as automatic Doppler tracking for EME
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QSOs and Echo testing. The program runs equally well on Windows,
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Macintosh, and Linux systems, and installation packages are available
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for all three platforms.
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WSJT-X is an open-source project released under the GPL license (See
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COPYING). If you have programming or documentation skills or would
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like to contribute to the project in other ways, please make your
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interests known to the development team. The project’s source-code
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repository can be found at https://sourceforge.net/projects/wsjt, and
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most communication among the developers takes place on the email
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reflector https://sourceforge.net/p/wsjt/mailman. User-level
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questions and answers, and general communication among users is found
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on the https://groups.yahoo.com/neo/groups/wsjtgroup/info email
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reflector.
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WSJT-X offers a “bi-lingual” operating mode in which you can transmit
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and receive JT65 and JT9 signals, switching between modes
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automatically as needed. Displayed bandwidth can be as large as 5
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kHz. If your receiver has as upper-sideband filter at least 4 kHz
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wide, you can have all the typical JT65 and JT9 activity on screen at
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once, available for making QSOs with a click of the mouse. Even with
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standard SSB-width IF filters, switching between JT65 and JT9 modes is
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quick and convenient. Be sure to read the online WSJT-X User's Guide.
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Project web site:
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Project web site:
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