From: Rik Strobbe <rik.strobbe@kuleuven.be>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>,
        "rsgb_lf_group@yahoogroups.co.uk" <rsgb_lf_group@yahoogroups.co.uk>,
        "600MRG@mailman.qth.net" <600MRG@mailman.qth.net>
Thread-Topic: SlowJT9 update (v0.9.10)
Thread-Index: AQHUgNRJUS44269IXEOMxQPDNE74vw==
Date: Tue, 20 Nov 2018 13:47:50 +0000
Message-ID: <1542721669174.9290@kuleuven.be>
References: <1541712573053.31739@kuleuven.be>,<1542362144885.30626@kuleuven.be>
In-Reply-To: <1542362144885.30626@kuleuven.be>
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Subject: LF: SlowJT9 update (v0.9.10)
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Dear all,


I just uploaded a now beta-release of SlowJT9 (v0.9.10).

The changes are


- JT9-2 and JT9-5 parameters changed to the original ones. The slightly slo=
wer baudrates make better advance of the transmission cycle. In theory this=
 should improve S/N by 0.46 dB for JT9-2 and 0.74 dB for JT9-5.

Be aware that due to the baudrate changes there is NO BACKWARD COMPATIBILIT=
Y for JT9-2 and JT9-5.
In other words: JT9-2 and JT9-5 send with v0.9.10 cannot be decoded with pr=
ior versions (v0.9.00 - v0.9.03) and vice versa.

The JT9-1 mode however is still the same and can be sent / received with al=
l versions (and is WSJT-X compatible).


- JT9-10 mode (10 minute cycle) added, for the fearless.


I briefly tested v?0.9.10 for in JT9-2 mode and it seems to decode (at leas=
t) at the same level as for the previous versions. But to determine a diffe=
rence of 0.4dB, more extensive tests are needed.


The sole purpose of this version is to determine how JT9-2, and eventually =
JT9-5, behave in relation to the previous versions, so we can decide wether=
 SlowJT9 will proceed with the original parameters (anno 2013) that imply a=
n odd baudrate ratio between the JT9 submodes or my previous parameters, wi=
th "round number" ratios.

Therefore all test reports, remarks, suggestions and opinions are most welc=
ome.


For the same reason no other changes are applied.


Whoever is interested can download the SlowJT9 installation file at http://=
472khz.org/SlowJT9/SlowJT9_setup.exe.


For now only a Windows version of SlowJT9 is available. But as the used IDE=
 has cross platform facilities it should be possible to support other opera=
ting systems as well in the future.

73, Rik  ON7YD - OR7T


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<p>Dear all,</p>
<p><br>
</p>
<p>I just uploaded a now beta-release of SlowJT9 (v0.9.10).<br>
</p>
<p>The changes&nbsp;are<br>
</p>
<p><br>
</p>
<p>-&nbsp;<span style=3D"font-size: 10pt;">JT9-2 an</span><span style=3D"fo=
nt-size: 10pt;">d JT9-5 parameters changed to the original ones. The slight=
ly slower baudrates make better advance of the transmission cycle. In theor=
y this should improve S/N by 0.46 dB for
 JT9-2 and 0.74 dB for JT9-5.</span></p>
<strong style=3D"color: rgb(255, 0, 0); text-decoration: none solid rgb(255=
, 0, 0);"><span style=3D"color: rgb(255, 0, 0); text-decoration: none solid=
 rgb(255, 0, 0);">Be aware that due to the baudrate changes there is NO BAC=
KWARD COMPATIBILITY for JT9-2 and JT9-5.&nbsp;</span></strong></div>
<div><strong style=3D"color: rgb(255, 0, 0); text-decoration: none solid rg=
b(255, 0, 0);"><span style=3D"color: rgb(255, 0, 0); text-decoration: none =
solid rgb(255, 0, 0);">In other words: JT9-2 and JT9-5 send with v0.9.10 ca=
nnot be decoded with prior versions
 (v0.9.00 - v0.9.03) and vice versa.</span></strong>
<p>The&nbsp;JT9-1&nbsp;mode however is still the same and can be sent&nbsp;=
/ received with all versions (and is WSJT-X compatible).<br>
</p>
<p><br>
</p>
<p>- JT9-10 mode (10 minute cycle)&nbsp;added,&nbsp;for the fearless.<br>
</p>
<p><br>
</p>
<p>I&nbsp;briefly&nbsp;tested v&#8203;0.9.10 for in&nbsp;JT9-2 mode and it =
seems to decode (at least) at the same level as&nbsp;for the previous versi=
ons.&nbsp;But to determine a difference of 0.4dB, more extensive tests are =
needed.<br>
<br>
</p>
<p><strong>The sole purpose of this version is to determine how JT9-2, and =
eventually&nbsp;JT9-5, behave&nbsp;in relation to the previous versions, so=
 we can decide wether SlowJT9 will proceed with the original parameters&nbs=
p;(anno 2013)&nbsp;that imply an odd baudrate&nbsp;ratio
 between the JT9 submodes or my previous parameters, with &quot;round numbe=
r&quot; ratios.&nbsp;</strong></p>
<p><strong>Therefore all test reports, remarks, suggestions and opinions&nb=
sp;are most welcome.</strong><br>
<br>
</p>
<p>For the same reason no other changes are&nbsp;applied.<br>
</p>
<p><br>
</p>
<div dir=3D"ltr" style=3D"font-size:10pt; color:#000000; background-color:#=
FFFFFF; font-family:Tahoma,Geneva,sans-serif">
<div>
<p>Whoever is interested can download the SlowJT9&nbsp;installation file&nb=
sp;at&nbsp;<a href=3D"http://472khz.org/SlowJT9/SlowJT9_setup.exe">http://4=
72khz.org/SlowJT9/SlowJT9_setup.exe</a>.<br>
</p>
<p><br>
</p>
<p>For now only a Windows version of&nbsp;SlowJT9&nbsp;is available. But as=
 the used IDE has cross platform facilities it should be possible to suppor=
t other operating systems as well in the future.<br>
</p>
<div><br>
</div>
<div>73, Rik&nbsp; ON7YD - OR7T<br>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
</div>
</div>
</div>
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