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README
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@ -11,11 +11,11 @@
Copyright (C) 2001 - 2019 by Joe Taylor, K1JT.
Copyright (C) 2001 - 2021 by Joe Taylor, K1JT.
WSJT-X Version 2.1 offers ten different protocols or modes: FT4, FT8,
JT4, JT9, JT65, QRA64, ISCAT, MSK144, WSPR, and Echo. The first six
are designed for making reliable QSOs under weak-signal
WSJT-X Version 2.3 offers ten different protocols or modes: FT4, FT8,
JT4, JT9, JT65, QRA64, FST4, ISCAT, MSK144, WSPR, FST4W, and Echo. The
first seven are designed for making reliable QSOs under weak-signal
conditions. They use nearly identical message structure and source
encoding. JT65 and QRA64 were designed for EME (“moonbounce”) on the
VHF/UHF bands and have also proven very effective for worldwide QRP
@ -35,7 +35,12 @@ dB. FT4 is faster still (7.5 s T/R sequences) and especially well
suited for radio contesting. On the HF bands, world-wide QSOs are
possible with any of these modes using power levels of a few watts (or
even milliwatts) and compromise antennas. QSOs are possible at signal
levels 10 to 15 dB below those required for CW.
levels 10 to 15 dB below those required for CW. FST4 has similarities
in use to JT9 but offers more flexibility as it offers different
period lengths allowing QSO completion time to be traded off against
sensitivity. In its base form of FST4-60A it has better sensitivity
than JT9A and should be considered as an upgrade where JT9 has been
the preferred slow QSO mode.
Note that even though their T/R sequences are short, FT4 and FT8 are
classified as slow modes because their message frames are sent only
@ -64,6 +69,11 @@ internet access can automatically upload reception reports to a
central database called WSPRnet that provides a mapping facility,
archival storage, and many other features.
FST4W, like WSPR, is a quasi-beacon mode, it targets LF and MF bands
and offers a number of T/R periods form 2 minutes up to 30 minutes for
the most challenging weak signal paths. Similarly to WSPR reception
reports can be automatically uploaded to the WSPRnet.org web service.
Echo mode allows you to detect and measure your own station’s echoes
from the moon, even if they are far below the audible threshold.
@ -78,11 +88,12 @@ WSJT-X is an open-source project released under the GPLv3 license (See
COPYING). If you have programming or documentation skills or would
like to contribute to the project in other ways, please make your
interests known to the development team. The project’s source-code
repository can be found at https://sourceforge.net/projects/wsjt, and
repositories can be found at
https://sourceforge.net/p/wsjt/wsjtx/ci/master/tree/, and
communication among the developers takes place on the email reflector
https://sourceforge.net/p/wsjt/mailman. User-level questions and
answers, and general communication among users is found on the
https://groups.yahoo.com/neo/groups/wsjtgroup/info email reflector.
https://wsjtx.groups.io/g/main email reflector.
Project web site:
@ -92,4 +103,4 @@ https://www.physics.princeton.edu/pulsar/K1JT/wsjtx.html
Project mailing list (shared with other applications from the same
team):
https://groups.yahoo.com/neo/groups/wsjtgroup
https://sourceforge.net/projects/wsjt/lists/wsjt-devel