WSJT-X/doc/user_guide/en/settings-advanced.adoc

42 lines
1.6 KiB
Plaintext
Raw Normal View History

image::settings-advanced.png[align="center",alt="Settings Advanced"]
_JT65 decoding parameters_
- *Random erasure patterns* logarithmically scales the number of
pseudo-random trials used by the Franke-Taylor JT65 decoder. 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 *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 *FT8 and MSK144 Contest Mode* to enable generation and
auto-sequencing of MSK144 messages with four-character grid locators
in place of signal reports.
- 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.