To: Users of WSJT-X
From: Joe Taylor, K1JT
The installation file for WSJT-X version 0.4, revision 2731 has been
posted at
http://physics.princeton.edu/pulsar/K1JT/WSJTX_04r2731.exe
In this revision a number of known bugs have been fixed, and the JT9
decoder is significantly improved. Among other improvements, the
program is now much less fussy about timing issues.
My "To Do" list for WSJT-X is far from empty -- for example, many
user-convenience features are yet to be implemented. However, in its
present state WSJT-X performs well and will enable you to make QSOs at
signal levels down to those specified on the last page of the User's Guide:
http://physics.princeton.edu/pulsar/K1JT/WSJT-X_Quick_Start_Guide.pdf
In some circumstances the present decoder will seem slow. Speed
enhancements are yet to come. In the meantime, you will find it best to
set "Tol" (the frequency tolerance parameter) to a value only a few
times the width of the desired JT9 signal.
I have now made many QSOs with JT9-1 on 160 m, often with inaudible
signals. I look forward to working you on that band soon! I also hope
to have good receiving systems soon for 137 and 472/500 kHz: maybe we
can work cross-band? A number of us have been coordinating our activity
on the K3UK Sked Page: go to
http://www.obriensweb.com/sked/ and then click on "digitalradio" at the
upper right.
As always, your feedback on WSJT-X will be greatly appreciated! I'll do
my best to fix reported bugs quickly. During this testing period,
please remember to run the program with "Save All" checked, and send me
examples of *.wav files on which the decoder behaves poorly.
-- 73, Joe, K1JT
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