WSJT-X/doc/user_guide/en/settings-advanced.adoc
Joe Taylor ddeb1bab4e Many editorial changes to User Guide.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7235 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
2016-10-26 15:36:22 +00:00

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image::settings-advanced.png[align="center",alt="Settings Advanced"]
_JT65 decoding parameters_
- *Random erasure patterns* sets the number of pseudo-random trials
used by the Franke-Taylor JT65 decoder, on a logarithmic scale.
Larger numbers give slightly better sensitivity but take longer. For
most purposes a good setting is 6 or 7.
- *Aggressive decoding level* sets the threshold for acceptable
decodes using Deep Search. Higher numbers will display results
with lower confidence levels.
- Check *MSK144 Contest Mode* to cause generation and auto-sequencing
of MSK144 messages with four-character grid locators in place of signal
reports.
- Check *Two-pass decoding* to enable a second decoding pass after
signals producing first-pass decodes have been subtracted from the
received data stream.
_Miscellaneous_
- Set a positive number in *Degrade S/N of .wav file* to add known
amounts of pseudo-random noise to data read from a .wav file. To
ensure that the resulting S/N degradation is close to the requested
number of dB, set *Receiver bandwidth* to your best estimate of the
receiver's effective noise bandwidth.
- Set *Tx delay* to a number larger than the default 0.2 s to create
a larger delay between execution of a command to enable PTT and onset
of Tx audio.
IMPORTANT: For the health of your T/R relays and external
preamplifier, we strongly recommend using a hardware sequencer and
testing to make sure that sequencing is correct.
- Check *x 2 Tone spacing* to generate Tx audio with twice the normal
tone spacing. This feature is intended for use with specialized LF/MF
transmitters that divide the audio waveform by 2 before further
processing.