[Nodxa] New parts of WSJTX not for general DXing

[Williams, G (af8c)]

This short note is a result of talk on the K8FF net tonight.

Here are quotations from the WSJTX 2.3.0 User Manual provided just to 
answer some general questions.  I am not an expert on the new modes 
described below.

It appears that FST4 and FSTW, the "new parts", are for people to 
experiment with extremely low signal to noise ratio, very long period 
communications, on the LF and MF bands.  So it's not for general DXing.

Also 2.3.0 contains bug fixes, etc.  But there has been a lot of 
reflector traffic on problems caused by installing 2.3.0 on some PCs, 
Macs, and M1 Minis operating with some radios.  Not all, but some.

--------quotes-----

WSJT-X Version . offers twelve different protocols or modes: FST4, FT4, 
FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, WSPR, FST4W, and Echo.

FST4W is designed for similar purposes, but especially for use on LF and 
MF bands. It includes optional sequence lengths as long as 30 minutes 
and reaches sensitivity thresholds as low as -45 dB.

The FST4 protocol is optimized for two-way QSOs, while FST4W is for 
quasi-beacon transmissions of WSPR-style messages. FST4 and FST4W do not 
require the strict, independent phase locking and time synchronization 
of modes like EbNaut.

The new modes use 4-GFSK modulation and share common software for 
encoding and decoding messages. FST4 offers T/R sequence lengths of 15, 
30, 60, 120, 300, 900, and 1800 seconds, while FST4W omits the lengths 
shorter than 120 s.

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  If you really want to know what EbNaut is about, go to  < 
http://abelian.org/ebnaut/ > .   Some EbNaut signals are invisible in 
the spectrogram.

------------------

--73, Glenn, AF8C


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