Return-Path: X-Spam-DCC: paranoid 1481; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_MESSAGE,SPF_PASS,UNPARSEABLE_RELAY autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u9GGPtCC015470 for ; Sun, 16 Oct 2016 18:25:55 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bvoCw-0000w4-4E for rs_out_1@blacksheep.org; Sun, 16 Oct 2016 17:22:42 +0100 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bvoCv-0000vv-Jl for rsgb_lf_group@blacksheep.org; Sun, 16 Oct 2016 17:22:41 +0100 Received: from omr-a011e.mx.aol.com ([204.29.186.59]) by relay2.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1bvoCs-0000Bs-2j for rsgb_lf_group@blacksheep.org; Sun, 16 Oct 2016 17:22:40 +0100 Received: from mtaomg-aaj02.mx.aol.com (mtaomg-aaj02.mx.aol.com [172.27.3.208]) by omr-a011e.mx.aol.com (Outbound Mail Relay) with ESMTP id 8776C3800109 for ; Sun, 16 Oct 2016 12:22:33 -0400 (EDT) Received: from core-acb04f.mail.aol.com (core-acb04.mail.aol.com [172.27.24.4]) by mtaomg-aaj02.mx.aol.com (OMAG/Core Interface) with ESMTP id 27C5F38000083 for ; Sun, 16 Oct 2016 12:22:32 -0400 (EDT) Received: from 188.192.95.60 by webprd-a24.mail.aol.com (10.72.50.205) with HTTP (WebMailUI); Sun, 16 Oct 2016 12:22:31 -0400 Date: Sun, 16 Oct 2016 12:22:31 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <157ce4d4054-553e-7813@webprd-a24.mail.aol.com> In-Reply-To: <157cd9f1a3e.marcocadeddu@tin.it> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.95.60] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1476634953; bh=9k9aQoSI2az+HQ9tJvjygXhVu39ZJ3ye6nYMmaCH+DE=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=2GxpxramvKVhv9Q5y/L2t2/pRJS8i98vlnNO9LJOzAbj1UlAFs1Ao8afQl1TuD2NM WXnK9RFziuRM34wt0lfBMe5C4TELeFoNmNcJzo+PPxUPALTRsficwEoRKvFvAapEk8 KHeMETEuNIxCQDETEhas6wCod1JmX2PRMbenXIu0= x-aol-sid: 3039ac1b03d05803a9487dc1 X-Scan-Signature: 059065dc6500ac08f691f2dd07d4538f Subject: Re: R: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part1 Content-Type: multipart/alternative; boundary="----=_Part_39696_956196780.1476634951762" X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Content-Length: 14618 Status: O X-Status: X-Keywords: X-UID: 9105 ------=_Part_39696_956196780.1476634951762 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Yes the EbNaut decoder is indeed hungry for memory. I tried it once (and ne= ver again) on a little 1 GB Atom netbook - all that happened was that the h= arddrive light went on and the computer became unoperable until hard reset.= I normally use a heavier 8 GB laptop for this purpose, but attempting to d= ecode a stronger code (16K25) immediately froze that machine as well.=20 Stefan's file with 8K19 ran ok also on a 4 GB tablet, although the little1.= 83 GHz Celeron N2940 CPU chewed for 35 minutes to go through all phase comb= inations. The default 30=C2=B0-step setting finishes when it says "25% comp= lete", the finer 15=C2=B0 steps take four times as long. Fortunately when t= he frequency is correct and propagation phase was stable, the best decode u= sually appears already in one of the early constant-phase trials.=20 =20 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: marcocadeddu An: rsgb_lf_group Verschickt: So, 16 Okt 2016 3:14 pm Betreff: R: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part1 Markus, Stefan, thanks a lot for the nice tutorial, but I didn't succeed :-( either is=20 not enough idiotproof or there is something else.. What are the least system requirements for processing=20 Ebnaut decode? In the shack I have a tower pc running XP, the clock is 1,99 Ghz with=20 456Mb RAM; I downloaded Ebnaut 5.0 and the audio file you provided and=20 after following the guide (some time later..) I got the message "not=20 enough memory to run the decoding" and indeed although the computing=20 resources were not under pressure (4%) I seen that a 1Gb swap file was=20 running so the answer should be add RAM. I have also a netbook running w10 clock 1,7GHz with 1GB RAM: I tried=20 here but... I'm unable to set thw Ebnaut window size and therefore the RUN button=20 is not visible, the desktop size /resolution cannot be changed so in=20 order to see the full Ebnaut window I have to switch in the vertical=20 mode (of course in this case I see all but the mouse command are still=20 the same so when I move in vertical the mouse the cursor move=20 horizzontal...). Anyway finally everithing was set and pushed the RUN=20 button. The initialsation message was displayed but after 15 minutes all was=20 blocked with no sign of computing.. Did I miss something else? Thanks for any feedback 73 Marco IK1HSS ----Messaggio originale---- Da: markusvester@aol.com Data: 15-ott-2016 18.25 A: Ogg: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part1 Hi Tony,=20 downloading from the Dropbox link appeared to work fine here. Anyway=20 I've temporarily ftp-ed Stefan's file to http://df6nm.bplaced.net/VLF/fec_t= ests/10111913.wav , hope that might help out.=20 One minor note: Riccardo's transmission=20 was announced and sent 0.6 milliHz above nominal. Entering a frequency=20 offset of -14.9994 instead of -15 Hz produced a stronger and quicker=20 decode. All the best, Markus=20 -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Tony Baldwin An: rsgb_lf_group Verschickt: Sa, 15 Okt 2016 5:58 pm Betreff: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part1 Stefan I can't seem to download the dropbox files, it just opens to a video=20 playback. Tony On 15/10/2016 11:58, DK7FC wrote: Hi all,=20 There must be some progress. I thought it could be useful to lern how to participate in EbNaut=20 detections by doing 2 exercises. 1: Generating wav files that contain the message 2: Configure the EbNaut decoder to read the wav file successfully. Step 2 can be done today. First you need to download the decoder software at http://abelian.org/ebna= ut/ Then you need a wav-file containing a message. For this tutorial, you=20 can have a wav file that was generated on my PC. It contains even 2=20 messages (rare!). Download the file from: https://dl.dropboxusercontent.com/u/19882028/LF/10= 111913.wav To decode a EbNaut message you have to know the start time, the symbol=20 length, the number of characters and the Coding. These informations are=20 given by the TX stn. Info for message 1: Am 11.10.2016 19:04, schrieb IZ7SLZ:=20 Hello LF, Riccardo IW4DXW informs that he also will be QRV EbNaut tonight on=20 137485.0006 Hz Message contains 31 characters transmitted at 0.5 s/sym, coding 8K19A,=20 duration 14'40'' each hour starting 19.00Z till 23.00Z . GL. 73, Domenico iz7slz My file contains the 19:00 UTC transmission. Info for message 2: Hello Group, considering the Stefan's request, i'm pleased to test again EbNaut=20 today on LF with a 51 characters message, 8K19A code, 0.5 s/symbol,=20 duration 22' 40''. QRG =3D 137495.000 Hz Scheduled UT: at hour, starting from 19.00 'till 01.00 of 12-10-2016=20 (included). Carrier will be "on" 5 minutes before the transmissions. Now use the EbNaut decoder and select the wav file. For the first=20 message you can choose 31 characters, and 0.5 for the symbol period.=20 Then press start, just for a few seconds, then stop again. You will now=20 see some more informations: The RX freqency and the file start time.=20 Now you can select the frequency offset, which is -15 Hz. Type that=20 into the field. The next thing is the timing offset. The start time is 18:54:22.340=20 and the message started 19:00:00. You need to know the timing offset=20 precisely! If you don't get a decode, it is worth to vary the time=20 offset a bit. A timing offset could of course also come from the TX=20 stn, sometimes unknown. SpecLab causes a time offset of 4 samples. You=20 can also see the samplerate 117.19/sec. So the timing offset is: (4S)/ (117.19S/sec)+0.66sec+37sec+300sec =3D 337.69 seconds. Type that into the= =20 start offset field. Now you can start the decoder and should get a decode quite quickly,=20 depending on your PC power. By changing just the number of characters and the frequency offset,=20 you should receive the other message. Fine, that was part 1 :-) I need to get a feedback now if YOU got a successful decode or if=20 there are problems. Depending on that feedback i would then continue=20 with part 2. Can someone of the 'newcomers' decode both messages? 73, Stefan ------=_Part_39696_956196780.1476634951762 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Yes the EbNaut decoder is indeed hungry for memory.= I tried it once (and never again) on a little 1 GB Atom netbook - all= that happened was that the harddrive light went on and the computer b= ecame unoperable until hard reset. I normally use a heavier 8 GB = laptop for this purpose, but attempting to decode a stronger code (16K25)&n= bsp;immediately froze that machine as well.

Stefan's file with= 8K19 ran ok also on a 4 GB tablet, although the little1.83 GHz Celero= n N2940 CPU chewed for 35 minutes to go through all phase combina= tions. The default 30=C2=B0-step setting finishes when it says&nb= sp;"25% complete", the finer 15=C2=B0 steps take four times as long. Fortun= ately when the frequency is correct and propagation phase was sta= ble, the best decode usually appears already in one of the early = constant-phase trials.
 
73, Markus (DF6NM)

-----Urspr= =C3=BCngliche Mitteilung-----
Von: marcocadeddu <marcocadeddu@tin.it= >
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschick= t: So, 16 Okt 2016 3:14 pm
Betreff: R: Re: LF: Idiot's guide to receivin= g Ebnaut? - Tutorial part1


Markus, Stefan,

thanks a= lot for the nice tutorial, but I didn't succeed :-( either is
not enou= gh idiotproof or there is something else..
What are the least system req= uirements for processing
Ebnaut decode?
In the shack I have a tower = pc running XP, the clock is 1,99 Ghz with
456Mb RAM; I downloaded Ebnau= t 5.0 and the audio file you provided and
after following the guide (so= me time later..) I got the message "not
enough memory to run the decodi= ng" and indeed although the computing
resources were not under pressure= (4%) I seen that a 1Gb swap file was
running so the answer should be a= dd RAM.
I have also a netbook running w10 clock 1,7GHz with 1GB RAM: I = tried
here but...
I'm unable to set thw Ebnaut window size and there= fore the RUN button
is not visible, the desktop size /resolution cannot= be changed so in
order to see the full Ebnaut window I have to switch = in the vertical
mode (of course in this case I see all but the mouse co= mmand are still
the same so when I move in vertical the mouse the curso= r move
horizzontal...). Anyway finally everithing was set and pushed th= e RUN
button.
The initialsation message was displayed but after 15 m= inutes all was
blocked with no sign of computing..

Did I miss so= mething else?

Thanks for any feedback

73 Marco IK1HSS
----= Messaggio originale----
Da: markusvester@aol.com
Data: 15-ott-2016 18.25
A: <= ;rsgb_lf_= group@blacksheep.org>
Ogg: Re: LF: Idiot&#39;s guide to recei= ving Ebnaut? - Tutorial part1

Hi Tony,

downloading from the = Dropbox link appeared to work fine here. Anyway
I've temporarily ftp-ed= Stefan's file to http://df6nm.bplaced.net/VLF/fec_tests/10111913.wa= v
, hope that might help out.

One minor note: Riccardo's tra= nsmission
was announced and sent 0.6 milliHz above nominal. Entering a = frequency
offset of -14.9994 instead of -15 Hz produced a stronger and = quicker
decode.

All the best,
Markus



-----Urs= pr=C3=BCngliche Mitteilung-----
Von: Tony Baldwin <ei8jk@topmail.ie>
An: rsgb_l= f_group <rsgb_lf_group@blacksheep.org>
Verschickt: Sa, 15 Okt 2016 5:58= pm
Betreff: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part1=




Stefan
I can't seem to download the dropbox files, = it just opens to a video
playback.
Tony



On 15/10/201= 6 11:58, DK7FC wrote:


Hi all,

There must be some progre= ss.
I thought it could be useful to lern how to participate in EbNaut <= br>detections by doing 2 exercises.
1: Generating wav files that contai= n the message
2: Configure the EbNaut decoder to read the wav file succ= essfully.

Step 2 can be done today.
First you need to download t= he decoder software at http://abelian.org/ebnaut/
Then you need a wav-file containing= a message. For this tutorial, you
can have a wav file that was generat= ed on my PC. It contains even 2
messages (rare!).
Download the file= from: https://dl.dropboxusercontent.com/u/19882028/LF/1011= 1913.wav
To decode a EbNaut message you have to know the start time= , the symbol
length, the number of characters and the Coding. These inf= ormations are
given by the TX stn.
Info for message 1:

Am 11= .10.2016 19:04, schrieb IZ7SLZ:

Hello LF,
Riccardo IW4DXW infor= ms that he also will be QRV EbNaut tonight on
137485.0006 Hz
Messag= e contains 31 characters transmitted at 0.5 s/sym, coding 8K19A,
durati= on 14'40'' each hour starting 19.00Z till 23.00Z .

GL.
73, Dom= enico iz7slz


My file contains the 19:00 UTC transmission.
I= nfo for message 2:









Hello Group,
<= br> considering the Stefan's request, i'm pleased to test again EbNaut
= today on LF with a 51 characters message, 8K19A code, 0.5 s/symbol,
dur= ation 22' 40''.
QRG =3D 137495.000 Hz

Scheduled UT: at hour, st= arting from 19.00 'till 01.00 of 12-10-2016
(included). Carrier will be= "on" 5 minutes before the transmissions.

Now use the EbNaut decod= er and select the wav file. For the first
message you can choose 31 cha= racters, and 0.5 for the symbol period.
Then press start, just for a fe= w seconds, then stop again. You will now
see some more informations: Th= e RX freqency and the file start time.
Now you can select the frequency= offset, which is -15 Hz. Type that
into the field.
The next thing = is the timing offset. The start time is 18:54:22.340
and the message st= arted 19:00:00. You need to know the timing offset
precisely! If you do= n't get a decode, it is worth to vary the time
offset a bit. A timing o= ffset could of course also come from the TX
stn, sometimes unknown. Spe= cLab causes a time offset of 4 samples. You
can also see the samplerate= 117.19/sec. So the timing offset is: (4S)/
(117.19S/sec)+0.66sec+37sec+= 300sec =3D 337.69 seconds. Type that into the
start offset field.
N= ow you can start the decoder and should get a decode quite quickly,
dep= ending on your PC power.

By changing just the number of characters = and the frequency offset,
you should receive the other message.

= Fine, that was part 1 :-)
I need to get a feedback now if YOU got a suc= cessful decode or if
there are problems. Depending on that feedback i w= ould then continue
with part 2.
Can someone of the 'newcomers' deco= de both messages?

73, Stefan



------=_Part_39696_956196780.1476634951762--