mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-22 04:11:16 -05:00
4d8170f48a
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4677 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
47 lines
2.3 KiB
Plaintext
47 lines
2.3 KiB
Plaintext
|
|
__ __ ______ _____ ________ __ __
|
|
| \ _ | \ / \ | \| \ | \ | \
|
|
| $$ / \ | $$| $$$$$$\ \$$$$$ \$$$$$$$$ | $$ | $$
|
|
| $$/ $\| $$| $$___\$$ | $$ | $$ ______ \$$\/ $$
|
|
| $$ $$$\ $$ \$$ \ __ | $$ | $$| \ >$$ $$
|
|
| $$ $$\$$\$$ _\$$$$$$\| \ | $$ | $$ \$$$$$$/ $$$$\
|
|
| $$$$ \$$$$| \__| $$| $$__| $$ | $$ | $$ \$$\
|
|
| $$$ \$$$ \$$ $$ \$$ $$ | $$ | $$ | $$
|
|
\$$ \$$ \$$$$$$ \$$$$$$ \$$ \$$ \$$
|
|
|
|
|
|
|
|
Copyright (C) 2001 - 2014 by Joe Taylor, K1JT.
|
|
|
|
WSJT-X implements JT9, a new mode designed especially for the LF, MF,
|
|
and HF bands, as well as the popular mode JT65. Both modes were
|
|
designed for making reliable, confirmed QSOs under extreme weak-signal
|
|
conditions. They use nearly identical message structure and source
|
|
encoding. JT65 was designed for EME (“moonbounce”) on the VHF/UHF
|
|
bands and has also proved very effective for worldwide QRP
|
|
communication at HF; in contrast, JT9 is optimized for HF and lower
|
|
frequencies. JT9 is about 2 dB more sensitive than JT65A while using
|
|
less than 10% of the bandwidth. World-wide QSOs are possible with
|
|
power levels of a few watts and compromise antennas. A 2 kHz slice of
|
|
spectrum is essentially full when occupied by ten JT65 signals. As
|
|
many as 100 JT9 signals can fit into the same space, without overlap.
|
|
|
|
WSJT-X offers a “bi-lingual” operating mode in which you can transmit
|
|
and receive JT65 and JT9 signals, switching between modes
|
|
automatically as needed. Displayed bandwidth can be as large as 5
|
|
kHz. If your receiver has as upper-sideband filter at least 4 kHz
|
|
wide, you can have all the typical JT65 and JT9 activity on screen at
|
|
once, available for making QSOs with a click of the mouse. Even with
|
|
standard SSB-width IF filters, switching between JT65 and JT9 modes is
|
|
quick and convenient. Be sure to read the online WSJT-X User's Guide.
|
|
|
|
Project web site:
|
|
|
|
http://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
|
|
|