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ed26d6a249
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7987 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
67 lines
2.4 KiB
Plaintext
67 lines
2.4 KiB
Plaintext
=== Decoded Lines
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Displayed information accompanying decoded messages generally includes UTC,
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signal-to-noise ratio in dB, time offset DT in seconds, and
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audio frequency in Hz. Some modes include additional information such
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as frequency offset from nominal (DF), frequency drift (Drift or F1),
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or distance (km or mi).
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There may also be some cryptic characters with special meanings
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summarized in the following Table:
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[[DECODED_LINES_TABLE]]
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.Notations used on decoded text lines
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[width="50%",cols="h,3*^",frame=topbot,options="header"]
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|===========================================
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|Mode |Mode character|Sync character|End of line information
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|FT8 | ~ | | aP
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|JT4 | $ | *, # | f, fN, dNC
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|JT9 | @ | |
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|JT65 | # | |
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|JT65 VHF| # | *, # | f, fN, dNC
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|QRA64 | : | * | R
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|ISCAT | | * | M N C T
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|MSK144 | & | | N
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|===========================================
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Sync character::
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`*` - Normal sync +
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`#` - Alternate sync
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End of line information::
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`a` - Decoded with aid of some a priori (AP) information
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`C` - Confidence indicator [ISCAT and Deep Search; (0-9,*)] +
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`d` - Deep Search algorithm +
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`f` - Franke-Taylor or Fano algorithm +
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`M` - Message length (characters) +
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`N` - Number of Rx intervals or frames averaged +
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`P` - Number indicating type of AP information (see table below)
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`R` - Return code from QRA64 decoder +
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`T` - Length of analyzed region (s)
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[[AP_INFO_TABLE]]
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.AP information types
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[width="25%",cols="h10,<m20",frame=topbot,options="header"]
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|===========================================
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|P | Message components
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|1 | CQ     ?     ?
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|2 | DE     ?     ?
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|3 | MyCall     ?     ?
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|4 | MyCall DxCall     ?
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|5 | MyCall DxCall RRR
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|6 | MyCall DxCall 73
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|7 | MyCall DxCall RR73
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|8 | ?     DxCall     ?
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|===========================================
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=== Reference Spectrum
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WSJT-X provides a tool that can be used to determine the detailed
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shape of your receiver's passband. Disconnect your antenna or tune to
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a quiet frequency with no signals. With WSJT-X running in one of the
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slow modes, select *Measure reference spectrum* from the *File* menu.
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Wait for about a minute and then hit the *Stop* button. A file named
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`refspec.dat` should appear in your log directory.
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[ ... more to come ...]
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