Date: Wed, 3 May 2017 16:21:30 -0400
From: Markus Vester <markusvester@aol.com>
To: rsgb_lf_group@blacksheep.org
Message-Id: <15bcff98e23-6ee5-1ac54@webprd-m100.mail.aol.com>
In-Reply-To: <579355A36AEE9D4FA555C45D556003AB8FDD7085@servigilant.vigilant.local>
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Subject: Re: LF: SL settings for EbNaut FFT recording ?
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Hi Luis,

yes I also found that your file starts 20.76 seconds late. But this is not =
a big problem, because the decoder can cope with missing data at the beginn=
ing or end. For a late start you should simply enter a negative start offse=
t, i.e. -20.76 seconds plus four samples =3D -20.76 + 4 / 0.514 =3D -13 sec=
onds. In this case the loss is less than a single sample so perfectly negli=
gible. I also attempted to decode your file with no success, so probably ju=
st not enough SNR yet.

Best 73,
Markus  =20


-----Urspr=C3=BCngliche Mitteilung-----=20
Von: VIGILANT Luis Fern=C3=A1ndez <luis@vigilant.es>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mi, 3. Mai 2017 22:05
Betreff: Re: LF: SL settings for EbNaut FFT recording ?


Hi Markus=20


Not your fault ! I did not use your .USR directly. Tried to reproduce the c=
onfiguration manually

Then I did not realize about the different time pattern in the files. Now I=
 understand one more detail ;-)


Unfortunately EbNaut reports that the file start is at 18:00:20.760

So it seems it started too late. And the previous file will be one hour ear=
lier, so loosing the end of the transmission

Would it worth to use a bigger FFT of 10 hours for example ?


Anyway show_rawsyms3b produces a very flat graphic. No signs of a signal an=
ywere=20

I think that means "keep playing" ;-)


73 de Luis

EA5DOM
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<div style=3D"font-size:10pt;font-family:arial,helvetica,sans-serif;color:b=
lack;"><div style=3D"color: black; font-family: arial,helvetica,sans-serif;=
 font-size: 10pt;">Hi Luis,<br><br>yes I also found that your file&nbsp;sta=
rts&nbsp;20.76 seconds late.&nbsp;But&nbsp;this is&nbsp;not a big problem, =
because the decoder can cope with missing data at the beginning or end.&nbs=
p;For a late start&nbsp;you&nbsp;should simply enter a negative start offse=
t, i.e. -20.76 seconds plus four samples&nbsp;=3D -20.76&nbsp;+ 4 / 0.514 =
=3D&nbsp;-13 seconds. In this case the loss is less than a single sample so=
 perfectly negligible. I also attempted to decode&nbsp;your file with no su=
ccess, so probably&nbsp;just not enough SNR yet.<br><br>Best 73,<br>Markus&=
nbsp;&nbsp;&nbsp;<br><br><br>-----Urspr=C3=BCngliche Mitteilung----- <br>Vo=
n: VIGILANT Luis Fern=C3=A1ndez &lt;luis@vigilant.es&gt;<br>An: rsgb_lf_gro=
up &lt;rsgb_lf_group@blacksheep.org&gt;<br>Verschickt: Mi, 3. Mai 2017 22:0=
5<br>Betreff: Re: LF: SL settings for EbNaut FFT recording ?<br><br></div>
<div id=3D"AOLMsgPart_2_f6cb0aef-b938-4090-bc56-e6e86a8b84a6">
<div class=3D"aolReplacedBody">
<div style=3D"color: rgb(0, 0, 0); font-family: Tahoma; font-size: 10pt; di=
rection: ltr;">Hi Markus
<div><br>
</div>
<div>Not your fault ! I did not use your .USR directly. Tried to reproduce =
the configuration manually</div>
<div>Then I did not realize about the different time pattern in the files. =
Now I understand one more detail ;-)</div>
<div><br>
</div>
<div>Unfortunately EbNaut reports that the file start is at 18:00:20.760</d=
iv>
<div>So it seems it started too late. And the previous file will be one hou=
r earlier, so loosing the end of the transmission</div>
<div>Would it worth to use a bigger FFT of 10 hours for example ?</div>
<div><br>
</div>
<div>Anyway show_rawsyms3b produces a very flat graphic. No signs of a sign=
al anywere&nbsp;</div>
<div>I think that means "keep playing" ;-)</div>
<div><br>
</div>
<div>73 de Luis</div>
<div>EA5DOM</div>
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