JTDX & JT10

[Line Printer]

Greetings!

The JTDX application, as of version 17.8, brings us a new mode called
JT10. It seems to be in between JT65 and JT9 in that it has narrowed the
used bandwidth although has some multitone encoding. It is less pleasant
to listen to compared to JT65 although much more more entertaining than
JT9.

To illustrate that, there is an attached imaged captured on 40 meters of
two stations using JT10 calling CQ. This was while the radio was tuned to
7.080 MHz although similar things could also be found at 14.080 and a
variety of other related frequencies. Note the lack of JT65ish
"carrier"...

filename: wsjtx-wide-graph-screenshot-20170420-02.02.28.676395821.jpg


The JTDX app is fast changing and I try to keep track of it by looking at

https://forum.qrz.ru/6-cifrovye-vidy-radiosvyazi/44060-proekt-wsjt-x-mody-jt65-jt9-wspr-jt4-jtmsk-rabota-s-testovym-softom-425.html

and using the google translate.


BTW, while doing 2 Meter WSPR on April 11, I recieved some mystery signals
that almost seemed to be WSPRish signals. The second image I have
attached illustrated that.

73,
Kevin Martinez
KI6STW



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[Glenn Elmore]

Kevin,

Interesting developments. It looks like it is around 4X as wide as JT9.
Do you know what they estimate the minimum decoded S/N as? That would
perhaps be the most important question. I don't see how it can beat JT9
unless it takes more time to send, but it might be close.

I have no idea WRT the mystery signal. It looks like it had some ACS on
it. Nobody else was spotting anything around that time?

Glenn