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More editing of User Guide.

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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7335 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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Joe Taylor 2016-11-22 20:33:50 +00:00
parent 15c30a628d
commit 341f636232
3 changed files with 9 additions and 8 deletions
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2
doc/user_guide/en/odds_and_ends.adoc
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@ -32,7 +32,7 @@ End of line information::
`f` - Franke-Taylor or Fano algorithm + `f` - Franke-Taylor or Fano algorithm +
`M` - Message length (characters) + `M` - Message length (characters) +
`N` - Number of Rx intervals or frames averaged + `N` - Number of Rx intervals or frames averaged +
`R` - QRA64 _a priori_ return code + `R` - Amount of _a priori_ information used by decoder +
`T` - Length of analyzed region (s) `T` - Length of analyzed region (s)
=== Reference Spectrum === Reference Spectrum

14
doc/user_guide/en/vhf-features.adoc
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@ -155,12 +155,14 @@ image::JT65B.png[align="center",alt="JT65B"]
=== QRA64 === QRA64
QRA64 is an experimental mode in the Version 1.7 alpha release of QRA64 is an experimental mode in the Version 1.7 alpha release of
_WSJT-X_. In most ways you will find operation of QRA64 similar to _WSJT-X_. The mode is designed especially for EME on VHF and higher
JT65. The following screen shot shows an example of a QRA64C bands; operation is generally similar to JT65. The following screen
transmission from DL7YC recorded at G3WDG over the EME path at 24 GHz, shot shows an example of a QRA64C transmission from DL7YC recorded at
at a time when Doppler spread on the path was 78 Hz. The red curve G3WDG over the EME path at 24 GHz. Doppler spread on the path was 78
with a peak at 967 Hz shows that the decoder has detected its Hz, so although the signal is reasonable strong its tones are
synchronizing symbols, and the decode is successful. broadened enough to make them hardto see on the waterfall. The red
curve shows that the decoder has achieved synchronization with a
signal at about 970 Hz.
image::QRA64.png[align="center",alt="QRA64"] image::QRA64.png[align="center",alt="QRA64"]

1
lib/qra/qra64/qra64sim.f90
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@ -27,7 +27,6 @@ program qra64sim
call getarg(1,msg) call getarg(1,msg)
call getarg(2,csubmode) call getarg(2,csubmode)
mode64=2**(ichar(csubmode)-ichar('A')) mode64=2**(ichar(csubmode)-ichar('A'))
print*,csubmode,' ',mode64
call getarg(3,arg) call getarg(3,arg)
read(arg,*) nsigs read(arg,*) nsigs
call getarg(4,arg) call getarg(4,arg)