Hi Dawid,
I will contact you off-list. I think I have found a solution. But it
still needs to be tested further.
73 de DG2YCB,
Uwe
________________________________________
German Amateur Radio Station DG2YCB
Dr. Uwe Risse
eMail: dg2...@gmx.de
Info: www.qrz.com/db/DG2YCB
Am 27.03.2025 um 10:01 schrieb Dawid SQ6EMM via wsjt-devel:
Some small update.
"Bug" (from my perspective) was not introduced in wsjtx-2.1.0-rc5, but
AFTER wsjtx-2.1.0-rc5 binary release.
Test described in the previous email was done in docker containers
with specified versions installed inside.
<Dockerfile>
from ubuntu:18.04
ADD files /tmp
ADD JT4 /JT4
RUN apt -y update && apt -y dist-upgrade && apt -y install
/tmp/wsjtx_2.1.0-rc7_amd64.deb
</Dockerfile>
Yesterday evening I have built latest version of wsjtx from git and I
reverted the commit 2044b736dad8444272d3dd5f89cf63716ccbf073.
It did not help - so it seems it's more complicated than only this
commit, but this is where my knowledge of Fortran ends;)
śr., 26 mar 2025 o 22:39 Dawid SQ6EMM <sq6...@hamradio.pl> napisał(a):
Hey, for some time I have been playing a lot with JT4(g).
During those exercises it was identified that JT4(g) - I was only
playing with G is incorrectly reporting the SNR (meaning values
are never stronger than -13dB and there is no even indirect
connection between signal strength and JT4g report).
I described that a little bit broader on wsjt users group here:
https://wsjtx.groups.io/g/main/topic/111843701
But just to reach dev community and ask for fix I think its better
here...
So simple exercise (test files for JT4 - Charles G3WDG) and two
versions of wsjt:
for i in *.wav; do echo $i; jt9 -4 -d 3 -b G -f 1000 $i ; done
wsjtx-2.1.0-rc5:
000000_0002.wav
0002 -5 -0.1 1006 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0004.wav
0004 -7 -0.1 1002 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0006.wav
0006 -9 -0.1 1000 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0008.wav
0008 -11 -0.1 1004 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0010.wav
0010 -13 -0.1 995 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0012.wav
0012 -15 -0.1 1000 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0014.wav
0014 -17 -0.1 1004 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0016.wav
0016 -20 -0.1 998 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0018.wav
0018 -22 -0.0 995 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0020.wav
0020 -24 -0.1 1000 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0022.wav
0022 -26 -0.0 1000 $*
<DecodeFinished> 0 1
wsjtx-2.1.0-rc7:
000000_0002.wav
0002 -15 -0.1 1006 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0004.wav
0004 -15 -0.1 1002 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0006.wav
0006 -15 -0.1 1000 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0008.wav
0008 -15 -0.1 1004 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0010.wav
0010 -14 -0.1 995 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0012.wav
0012 -15 -0.1 1000 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0014.wav
0014 -15 -0.1 1004 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0016.wav
0016 -16 -0.1 998 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0018.wav
0018 -18 -0.0 995 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0020.wav
0020 -17 -0.1 1000 $* CQ DL0SHF JO54 f
<DecodeFinished> 0 1
000000_0022.wav
0022 -18 -0.0 1000 $*
<DecodeFinished> 0 1
and additionally I guess the commit that was about to fix it - I
guess might be a reason why its not working correctly now:
commit 2044b736dad8444272d3dd5f89cf63716ccbf073
Author: Joe Taylor <joe@...>
Date: Mon May 20 12:46:36 2019 -0400
Fix a bug in calculation of S/N in JT4 mode.
Thanks for your help in advance.
--
Dawid
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