48 lines
1.8 KiB
Plaintext
48 lines
1.8 KiB
Plaintext
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=== 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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|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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`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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`R` - Return code from QRA64 decoder +
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`T` - Length of analyzed region (s)
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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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