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Updates to User Guide with a new QRA64C example.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7332 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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@ -155,17 +155,12 @@ image::JT65B.png[align="center",alt="JT65B"]
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=== QRA64
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QRA64 is an experimental mode in the Version 1.7 alpha release of
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_WSJT-X_. Some details of the protocol are still subject to change,
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and some features of the decoder will almost surely change. In most
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ways you will find operation of QRA64 similar to JT65. The following
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screen shot shows examples of two QRA64A transmissions recorded over
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the EME path. The first (at 1554 UTC) shows G4SWX transmitting to
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K1JT at 144 MHz; the second shows VK7MO transmitting to G3WDG at 10
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GHz. Notice the small red curve plotted below frequency 1000 Hz in
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the Wide Graph. Even though the VK7MO signal is hard to discern in
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the waterfall, the red curve shows that the decoder has accurately and
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reliably detected its synchronizing symbols, and the decode is
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successful.
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_WSJT-X_. In most ways you will find operation of QRA64 similar to
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JT65. The following screen shot shows an example of a QRA64C
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transmission from DL7YC recorded at G3WDG over the EME path at 10 GHz,
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at a time when Doppler spread on the path was 82 Hz. The red curve
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with a peak at 967 Hz shows that the decoder has detected its
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synchronizing symbols, and the decode is successful.
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image::QRA64.png[align="center",alt="QRA64"]
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