Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w9FM7ISS010233 for ; Tue, 16 Oct 2018 00:07:26 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gCAoF-0001zS-VB for rs_out_1@blacksheep.org; Mon, 15 Oct 2018 22:53:55 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gCAiX-0001ys-J4 for rsgb_lf_group@blacksheep.org; Mon, 15 Oct 2018 22:48:01 +0100 Received: from sonic305-4.consmr.mail.bf2.yahoo.com ([74.6.133.43]) by relay1.thorcom.net with esmtp (Exim 4.91_59-0488984) (envelope-from ) id 1gCAiU-0001jT-Cv for rsgb_lf_group@blacksheep.org; Mon, 15 Oct 2018 22:48:00 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aol.com; s=a2048; t=1539640074; bh=lBTgPvwHIwbur5x9j0Bk42Rl2K+fozHhMgXOrh7ktpk=; h=Date:From:To:Subject:References:From:Subject; b=TsqDzSahy9GO2mGRFhgvLjqm+4fKG53ANA/iEhALCfSFtvPuRBRiPmxWSvzSg/k7C5uv2yljsxBMkh61hEJw4JGjezFEaOUV0CMB3940UkO92Wb8/cRSYONau9gzGWABOyCrtBw9sFYUEASxTuIo6oNm+lRXF0+t/kDZ7sGnpGX+xRYoRj+83EnbqgGf2o0luBwxrMHqF+nSIJ5yX1WJ4OBJHe/Lu6xgTIkfXg1COtREQTSWXbQihSzlKa0V8vrVXyZcjJ6EB+Eq+0t4gEX1tmSuPuzSGzEkqUSxHriUta9DP4uJSPAiRVqVQJPpvGXxlqKWYP7DNl9RkFeaNOFGcA== X-YMail-OSG: OI9am3gVM1k_.tszpOngCEway9iyX9hvcArrZ3pGbuYDfXs7WWyAfVry1hSyVHB V1jdsR1IAqmKnuf1sVUSbbPaT0SIEk3IJqUbLDbJixUn2hNCJx9trzEcctHzhYECYpGLQ0gV1SNp pszHatbuOU2jNu2NKlc4JFX6cD1pUopHfaBXu_tBFqjUVLpN1_yuppb6SCa6qQl_qph2sna5HhpE dJe0Q4a8cz8aD6S2aZtEGDqvhZETzfiJcwnX6pfB1q1qg9PacOwMPEoHGt._ebIfPwV9FRO515Ev ZLmfxZk3qEWlL.fEh02XtfHjS.M_rCAEJR4DT1Kb0.GHNEco9ThaVxsdFltceY4QQSknW3OzA7Tr eOC7et_UbORCVWArvjP2ZNVHU9RyEq1CLAip_yTMi.PdpFCmZAVX6OTSnB9AM07aAJ36vqWZxfoB dy1BVIT2onDOf.R5VLCaFXKZ9sZIG54wgIExY2gqBegxSUygGghbPZKovSvw4u4I1FCEu0QuvIyu tgRR4qxOqaTHlsN2bOWt85PuwHXfTVgsubg3q9WC1TXf6am2IBLdrURUkk0gwT4t7yTKpHp_ljaQ xepACaMEijv0abj73m0Daa5s7cLXV0JIrODxJCtuMT_8tOEsHHeJOPA7nIosPb8pSpAEqMoGdu_t 68oLXL_EUHsP3LJ7v5UYsHnwzniiAPUCzAZSHvxVk4R8yYcnSTVvrC16CD5W0k8k51XKqh6r2ypQ MyPGkPpEIHPLvA.ZuVNgSGDQtH30zr9qiE3OSKrejQ7XvauXuEfT4IGAjG5kR57wrM0rNwhw1l_Z QQrTGvUnHYM0S9wYi95GzvUW9ljPO4OEuCOJm1JB.wIHuAFTxCuw.MXhP0NAwuj_MRb.Qls8h1D6 37f2P321h.IMnTdef9MqB6wUqpv.EusUmDRwGeku3LhsG9SM1jvp2p8_YoIdCNna31jOZTl0wNyC s7yTn8vQU5oXd8vCBn7o73zrFb0yTJ4mh4inj082obxqLsl75DeCw3hXH0f4KE6A4B94dYTrKW0T tilpM Received: from sonic.gate.mail.ne1.yahoo.com by sonic305.consmr.mail.bf2.yahoo.com with HTTP; Mon, 15 Oct 2018 21:47:54 +0000 Date: Mon, 15 Oct 2018 21:47:51 +0000 (UTC) From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-ID: <262456988.10374595.1539640071739@mail.yahoo.com> Subject: Re: LF: EbNaut Autodecoder 137490 Hz MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_10374594_213518691.1539640071732" References: <262456988.10374595.1539640071739.ref@mail.yahoo.com> X-Mailer: WebService/1.1.12512 aolwebmail Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; Touch; rv:11.0) like Gecko X-Spam-Score: 1.6 (+) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Here are the Windows scripts which I am currently using for the EbNaut autodecoder. It is based on an already running opds-32 instance, providing a copy "fft.txt" of the current export file every 10 minutes. The "cleanup.bat" script, which is executed after each Opera correlation run, gets an extra line which creates a dummy file "do.txt" to invoke the Ebnaut decoder: [...] Content analysis details: (1.6 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [74.6.133.43 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 1.6 FORGED_MUA_MOZILLA Forged mail pretending to be from Mozilla X-Scan-Signature: 50066481ef8267c25c4bcbad351efa5e X-SA-Exim-Scanned: No; SA Timed out after 180 secs 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 ------=_Part_10374594_213518691.1539640071732 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Here are the Windows scripts which=C2=A0I am currently using=C2=A0for the E= bNaut autodecoder. It=C2=A0is based on=C2=A0an already running opds-32 inst= ance, providing=C2=A0a copy "fft.txt" of the current export file every 10 m= inutes. The=C2=A0"cleanup.bat" script, which is executed after each Opera c= orrelation run,=C2=A0gets an extra line which creates a dummy file "do.txt"= to invoke the Ebnaut decoder: cleanup.bat: @echo DF6NM JN59nj=C2=A0 Opera-32 Deep Search=C2=A0 137.45 - 137.55 kHz=C2= =A0 %date% %time:~0,5% >time.txt @copy time.txt + headline.txt + detected.txt + detecold.txt opds32.txt >nul @::copy c:\spectrum\data\*.txt c:\spectrum\data\saved\ 1>nul 2>nul @del c:\spectrum\data\*.txt 1>nul 2>nul @copy dirw.txt dirdone.txt >nul @ftp -s:ftp_opds.txt >ftp_log.txt @echo >do.txt Here opds is running on my LF-grabber PC (called "SILVER") which is an old = laptop under 32-bit Win-XP. The EbNaut=C2=A0decoder is on a different 64-bi= t machine,=C2=A0and it accesses the=C2=A0opds folder through Windows filesh= ares. Note that for some reason, the 32-bit Version of ebnaut-rx=C2=A0won't= autostart using the=C2=A0-a option. This is the autodecoder script which b= ecomes active after each half hour: autodecodehalfhour.bat: :loop if exist \\SILVER\SharedDocs\Funk\Opera\opds\do.txt goto cont1 sleep 30 goto loop :cont1 del \\SILVER\SharedDocs\Funk\Opera\opds\do.txt if %time:~3,1% EQU 0 goto cont2 if %time:~3,1% EQU 3 goto cont2 :: files should be ready within 5 minutes after half hour goto loop :cont2 copy \\SILVER\SharedDocs\Funk\Opera\opds\fft.txt fft.txt /y ebnaut_ifft3b fft.txt del fft.dat findoffset 0 set /p startoffset=3D>ebnautresults.txt echo --------------------------------------- >>ebnautresults.txtftp -s:ftp_= ebnaut.txt >ftp_ebnaut_log.txt goto loop As usual, you will need ebnaut_ifft3b.exe, ebnaut-rx.exe and the appropriat= e sr.txt in the decoder folder. Invoking show_rawsyms could=C2=A0just as we= ll be omitted=C2=A0for unattended operation. Taskkill is=C2=A0a workaround as neither ebnaut-rx nor showrawsyms will ter= minate itself. The decoder runtime has been limited to 40 seconds, which tu= rned out to be long=C2=A0enough to run through all flat-phase decode attemp= ts (on this machine). The findoffset.exe=C2=A0utility is at=20 http://df6nm.bplaced.net/VLF/fec_tests/findoffset.zip It calculates the startoffset to the next=C2=A010 minute boundary and write= s it to=C2=A0startoffset.txt. To accomodate possible latencies (e.g. from a= virtual audio cable), it can be called with an extra delay (in seconds). For this to work, you should make sure that one=C2=A0export file starts bef= ore a half hour, and=C2=A0ends within a few minutes after the next half hou= r. For the usual 478 uHz=C2=A035-minute FFT , this can=C2=A0be achieved by= =C2=A0starting the opds SpecLab instance in the second half of any=C2=A010-= minute interval (e.g. between=C2=A0hh:55:00 and hh:59:50, but not between h= h:49:50 and hh:55:00)=C2=A0 The findstr command appends some selected lines from the log file to the en= d of ebnautresults.txt. You will also need another copy of sleep.exe http://df6nm.bplaced.net/VLF/fec_tests/sleep.zip and your own FTP control=C2=A0file which might look similar to this: ftp_ebnnaut.txt: open *Server* *Login* *Password* cd *Remote Folder* bin put ebnautresults.txt bye Hope this may be useful... Best 73,=20 Markus (DF6NM) Stefan wrote: PS: I try to set up that auto-decoder as well. And maybe i'll be back on LF= ... -----Urspr=C3=BCngliche Mitteilung----- Von: Markus Vester An: rsgb_lf_group Verschickt: Sa, 13. Okt 2018 13:32 Betreff: Re: LF: EbNaut Autodecoder 137490 Hz Ric now running 30 characters 0.1 s symbols - Gotcha ;-) 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung----- Von: Domenico IZ7SLZ An: rsgb_lf_group Verschickt: So, 7. Okt 2018 12:17 Betreff: Re: LF: EbNaut Autodecoder 137490 Hz I ran an EbNaut beacon for almost 24h, since 10.00 UT of yesterday,=C2=A0 f= or testing the repaired Tx antenna and ground system. I have monitored Both 'D' grabbers and they worked fine. I have obtained a = lot of decodes. So very good job Markus with the integration of Window's pr= ograms SL and EbNaut-rx. I supposed you made some modifications at your pre= vious EbNaut tools . Thanks for the new grabbers. Tx setup here : SSB exciter frequency controlled by the old Jupiter GPS, 10= 0 W PA, a small inv-L antenna (8 + 8 meters)=C2=A0 and linux program EbSynt= h by P.Nicholson. Time reference given by the same GPS using 'gdps' and 'ch= ronyc' programs. In the night i have also received, in the other 30-minutes time slot,=C2=A0= Ebnaut messages from Riccardo IW4DXW. Thanks Rick. Luis wrote:=C2=A0Similar grabber for JT9 MF would be a great idea. =C2=A0Yes. It is a good idea. So based on similar job already running (auto= - wspr) , i have added such auto-decoder in my Website: https://www.qsl.net/iz7slz/WSPR/JT9DECODED.TXT It uses the same RX setup (RECEIVER JRC NRD-92M GPS referenced and miniwhip= antenna) for recording the wspr band. Reception is very bad during the day= but in nightime there is possibility to pick up signals from Central Europ= e. So i invite the MF operators to test this grabber. Thanks in Advance. 73, Domenico IZ7SLZ =C2=A0On Sat, 6 Oct 2018 at 12:13, VIGILANT Luis Fern=C3=A1ndez wrote: Hi EbNaut Congratulations to both ! :-) This will be a funny tool and a great help for newcomers to EbNaut, as Tx i= s the easy part of the gameWill be joining the "grabbepeater" as soon as I = modify my D class PA for true 180=C2=BA phase modulation Similar grabber for JT9 MF would be a great idea. I can reach easily centra= l EU in MF but can not receivemany of the stations. Last time I tried a CW = activity night it was frustrating to receive in remote SDRscentral EU stati= ons answering back and nothing here. Not just a matter of Rx noise. Many st= ations donot have enought ERP to reach. So finally decided to use the SDR f= or QSO and it was fun Yes, of course, this are not IARU blessed QSOs, but real FUN QSOs. And FUN = is a must to increaseinterest in this bands. We are in 21 century and ham r= adio also changed. We shouldn't be so squareminded to just think in therms = of awards and standar QSOs. This is not HF. Same standards shouln't applyEx= perimental bands are to experiment and try different aproaches with differe= nt rules. Not to run the sameold style HF QSOs,=C2=A0contests, awards and a= ll that stuff My two cents ! ;-) 73 de LuisEA5DOM De: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org]= en nombre de Markus Vester [markusvester@aol.com] Enviado: s=C3=A1bado, 6 de octubre de 2018 9:17 Para: rsgb_lf_group@blacksheep.org Asunto: Re: LF: EbNaut Autodecoder 137490 Hz Last night, Domenico IZ7SLZ=C2=A0and=C2=A0myself had=C2=A0an unscheduled Eb= Naut two-way contact ;-) Well not quite a QSO, as we didn't exchange report= s etc. I had sent a couple of 6-character messages into the blue before goi= ng to bed, and=C2=A0was pleasantly surprised this morning to find Dom's=C2= =A0replies on all three automatic decoders.=20 Attached 477 uHz spectrogram from DL0AO shows both EbNaut signals, along wi= th a few other WSPR and Opera transmissions, and 6.25 Hz spaced Loran lines= from Slonim. Note that=C2=A0the receive level of=C2=A0nearby stations (DK1= IS and DF6NM)=C2=A0is being reduced by SpecLab's frequency-selective limite= r to avoid overloading and noiseblanker artifacts. Thank you very much Dom! Now we're hoping for more and distant signals, lik= e from Spain or U.S. ;-) 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: Mi, 3. Okt 2018 14:46 Betreff: LF: EbNaut Autodecoder 137490 Hz After some playing around, we are=C2=A0running an experimental EbNaut autod= ecoder at DL0AO and DF6NM=C2=A0under=C2=A0Windows. Receive parameters are c= urrently =C2=A0137490.000 Hz, 6 char, 3 s, 8K19A crc 16, start hh:00 and hh:30 and preliminary results can be found=C2=A0here (scroll to bottom): DL0AO: https://vlf.u01.de/LF/LFgrabber/ebnautresults.txt DF6NM: http://df6nm.darc.de/opds/ebnautresults.txt This is nowhere near as perfect as Domenico's Linux solution, and our softw= are contraption is=C2=A0nowhere=C2=A0near a stable state.=C2=A0Anyhow a=C2= =A0few test transmissions=C2=A0with=C2=A0a couple of microwatts radiated po= wer lead to useful decodes, and a trace also appeared in the opds spectrogr= am at DK7FC.=C2=A0It would be nice to=C2=A0find some more signals later... Best 73, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Domenico IZ7SLZ An: rsgb_lf_group Verschickt: Di, 2. Okt 2018 1:18 Betreff: Re: LF: 2200M EbNaut Beacon LF EbNauters, thanks to Markus and Stefan for the comments and to Rob for putting on air = a very good signal. I was also surprised to see the decode achieved by the auto-decoder without= any time and frequency offset !Propagation conditions are becoming better,= but noise here is still high.I tried a deep investigation: no further deco= de,=C2=A0 but with an offset of -0.0001 Hz and=C2=A0+0.005s (ooops !) i hav= e improved the 2018-09-30_03:00 UT decode: initial reference phase -62.3 amplitude 2.049e-01 phase=C2=A0=C2=A0 0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=A0=C2= =A0 0=C2=A0=C2=A0=C2=A0 0 carrier phase: -6.9 deg carrier Eb/N0: 0.5 dB carrier Es/N0: -10.10 dB carrier S/N: 19.87 dB in 672.0 uHz, -11.86 dB in 1Hz, -45.84 dB in 2.5kHz elapsed 58 found rank 43 ber 3.4980e-01 Eb/N0 -0.6 M -7.389708042e+00 ph 0 0,0,0,0 [K3= RWR_FM18QI_73] Looking on the October 1st recordings, with these offsets,=C2=A0 i got anot= her decode at 02:30 UT: initial reference phase -6.6 amplitude 2.356e-01 phase=C2=A0=C2=A0 0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=A0=C2=A0 0=C2=A0=C2=A0=C2= =A0 0=C2=A0=C2=A0=C2=A0 0 carrier phase: -1.2 deg carrier Eb/N0: 0.4 dB carrier Es/N0: -10.23 dB carrier S/N: 19.74 dB in 672.0 uHz, -11.99 dB in 1Hz, -45.97 dB in 2.5kHz elapsed 58 found rank 84 ber 3.6694e-01 Eb/N0 -1.7 M -7.504411221e+00 ph 0 0,0,0,0 [K3= RWR_FM18QI_73] QRB=C2=A0 is about 7600 km. Working conditions here, (vintage =F0=9F=98=80) as usual:- miniwhip (a modi= fied ex-Navtex antenna from Furuno ; see attachment)- receiver JRC NRD-92M = with external 10 MHz reference signal steered by=C2=A0 GPS- a modest PC (In= tel P4 CPU 3.50GHz x2) from scrap with Ubuntu 14.04LTS - software vlfrx-tool from Paul Nicholson. I have attached also the latest version of=C2=A0 the bash './autoebnaut' i.= e. the list of the commands that recall vlfrx-tool programs to start the de= coder each 30 minutes.Other linux programs are running in background:- vtca= rd and vttime to manage and calibrate the audio card- vtwrite to store audi= o coming from receiver- gpsd and chrony to manage the nmea and 1pps from ne= o8 gps (connected at serial COM1) and adjusting the PC Clock. 73, Domenico IZ7SLZ=20 =C2=A0 ------=_Part_10374594_213518691.1539640071732 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Here are the Windows scripts which I am= currently using for the EbNaut autodecoder. It is based on = an already running opds-32 instance, providing a copy "fft.txt" of the= current export file every 10 minutes. The "cleanup.bat" script, which= is executed after each Opera correlation run, gets an extra line whic= h creates a dummy file "do.txt" to invoke the Ebnaut decoder:

cleanup.bat:

@echo DF6NM JN59nj  Ope= ra-32 Deep Search  137.45 - 137.55 kHz  %date% %time:~0,5% >ti= me.txt
@copy time.txt + headline.txt + detect= ed.txt + detecold.txt opds32.txt >nul
@::c= opy c:\spectrum\data\*.txt c:\spectrum\data\saved\ 1>nul 2>nul
@del c:\spectrum\data\*.txt 1>nul 2>nul
@copy dirw.txt dirdone.txt >nul
@ftp -s:ftp_opds.txt >ftp_log.txt
@echo >do.txt

Here opds is running on my LF-grabber PC (called "SILVER") whic= h is an old laptop under 32-bit Win-XP. The EbNaut decoder is on a dif= ferent 64-bit machine, and it accesses the opds folder through Wi= ndows fileshares. Note that for some reason, the 32-bit Version of ebnaut-r= x won't autostart using the -a option. This is the autodecoder sc= ript which becomes active after each half hour:

autodecodehalfhour.bat:
:loop
if exist \\SILVER\SharedD= ocs\Funk\Opera\opds\do.txt goto cont1
sleep 3= 0
goto loop
:co= nt1
del \\SILVER\SharedDocs\Funk\Opera\opds\d= o.txt
if %time:~3,1% EQU 0 goto cont2
if %time:~3,1% EQU 3 goto cont2
:: files should be ready within 5 minutes after half hour
goto loop
:cont2
copy \\SILVER\SharedDocs\Funk\Opera\opds\fft.txt f= ft.txt /y
ebnaut_ifft3b fft.txt
del fft.dat
findoffset 0
set /p startoffset=3D<startoffset.txt
start /belownormal ebnaut-rx.exe -f fft.wav -N6 -p8K= 19A -k16 -L1000 -S3 -c2 -F-10 -T%startoffset% -a
sleep 2
start show_rawsyms3b.exe
sleep 38
taskkill /im e= bnaut-rx.exe
taskkill /im show_rawsyms3b.exe<= /div>
=
findstr "time found rank Eb/N0" fft-log.txt >&= gt;ebnautresults.txt
echo -------------------= -------------------- >>ebnautresults.txt
ftp -s:ftp_ebnaut.txt >ftp_ebnaut_log.txt
goto loop


As usual, you will need ebnaut_ifft3b.exe, ebnaut-rx.exe and the appropri= ate sr.txt in the decoder folder. Invoking show_rawsyms could just as = well be omitted for unattended operation.

Taskkill is a workaround as neither ebnaut-rx nor showrawsyms will = terminate itself. The decoder runtime has been limited to 40 seconds, which= turned out to be long enough to run through all flat-phase decode att= empts (on this machine).

The = findoffset.exe utility is at
http://df6= nm.bplaced.net/VLF/fec_tests/findoffset.zip
I= t calculates the startoffset to the next 10 minute boundary and writes= it to startoffset.txt. To accomodate possible latencies (e.g. from a = virtual audio cable), it can be called with an extra delay (in seconds).For this to work, you should make sure that one export fi= le starts before a half hour, and ends within a few minutes after the = next half hour. For the usual 478 uHz 35-minute FFT , this can be= achieved by starting the opds SpecLab instance in the second half of = any 10-minute interval (e.g. between hh:55:00 and hh:59:50, but n= ot between hh:49:50 and hh:55:00) 

The = findstr command appends some selected lines from the log file to the end of= ebnautresults.txt.

You will also need anoth= er copy of sleep.exe
http://df6nm.bplaced.net/VLF/fec_tests/= sleep.zip
and your own FTP control file which might loo= k similar to this:

ftp_ebnnaut.txt:

open *Server*
*Login*
*Password*
cd *Remote Folder*
bin
put ebnautresults.txt
bye


Hope this may be useful...

Best 73,
Markus (DF6NM)


Stefan wrote:

PS: I try to set up that auto-d= ecoder as well. And maybe i'll be back on LF...


-----Urspr= =C3=BCngliche Mitteilung-----
Von: Markus Ves= ter <markusvester@aol.com>
An: rsgb_lf_= group <rsgb_lf_group@blacksheep.org>
Ve= rschickt: Sa, 13. Okt 2018 13:32
Betreff: Re:= LF: EbNaut Autodecoder 137490 Hz

<= div abp=3D"468">
Ric now= running 30 characters 0.1 s symbols - Gotcha ;-)

73, Markus (DF6NM)


---= --Urspr=C3=BCngliche Mitteilung-----
Von: Dom= enico IZ7SLZ <iz7slz.domenico@gmail.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 7. Okt 2018 12:17
Betreff: Re: LF: EbNaut Autodecoder 137490 Hz

I ran an EbNaut beacon for almost 24h, since 10.= 00 UT of yesterday,  for testing the repaired Tx antenna and ground sy= stem.
I have monitored= Both 'D' grabbers and they worked fine. I have obtained a lot of decodes. = So very good job Markus with the integration of Window's programs SL and Eb= Naut-rx. I supposed you made some modifications at your previous EbNaut too= ls . Thanks for the new grabbers.

Tx setup here : SSB exciter frequency controlled by t= he old Jupiter GPS, 100 W PA, a small inv-L antenna (8 + 8 meters)  an= d linux program EbSynth by P.Nicholson. Time reference given by the same GP= S using 'gdps' and 'chronyc' programs.
=
In the night i have also received, in the other 30-minutes= time slot,  Ebnaut messages from Riccardo IW4DXW. Thanks Rick.
<= div abp=3D"499">
Luis wrote:
  Similar grabber for JT9 MF wou= ld be a great idea.

 
Yes. It is a good idea. So based on similar job already running (a= uto- wspr) , i have added such auto-decoder in my Website:
It uses the same RX setup = (RECEIVER JRC NRD-92M GPS referenced and miniwhip antenna) for recording th= e wspr band. Reception is very bad during the day but in nightime there is = possibility to pick up signals from Central Europe.
So i invite the MF operators to test this g= rabber.
Thanks in Adva= nce.
73, Domenico IZ7S= LZ

 
On Sat, 6 Oct 2018 at 12:= 13, VIGILANT Luis Fern=C3=A1ndez <luis@vigilant.es> wrote:
Hi EbNaut
Congratulations to both ! :-)
This will be a funny tool and a great help for newcomers t= o EbNaut, as Tx is the easy part of the game
Will be joini= ng the "grabbepeater" as soon as I modify my D class PA for true 180=C2=BA = phase modulation
Similar grabb= er for JT9 MF would be a great idea. I can reach easily central EU in MF bu= t can not receive
many of the s= tations. Last time I tried a CW activity night it was frustrating to receiv= e in remote SDRs
central EU stations answering back and nothing here. Not j= ust a matter of Rx noise. Many stations do
not have enought ERP to reach. So finally decided to use t= he SDR for QSO and it was fun<= br clear=3D"none" abp=3D"565">
Yes, of cours= e, this are not IARU blessed QSOs, but real FUN QSOs. And FUN is a must to = increase
interest in t= his bands. We are in 21 century and ham radio also changed. We shouldn't be= so square
minded to jus= t think in therms of awards and standar QSOs. This is not HF. Same standard= s shouln't apply
Experimental bands are to experiment and try different apr= oaches with different rules. Not to run the same
old style HF QSOs, contests, awards and all that stuff
My two cents ! ;-)
73 de Luis
EA5DOM

Last night, Domenico IZ7SLZ and myself = had an unscheduled EbNaut two-way contact ;-) Well not quite a QSO, as= we didn't exchange reports etc. I had sent a couple of 6-character message= s into the blue before going to bed, and was pleasantly surprised this= morning to find Dom's replies on all three automatic decoders.

Attached 477 uHz spectrogram from DL0AO shows both EbNaut signals, along wi= th a few other WSPR and Opera transmissions, and 6.25 Hz spaced Loran lines= from Slonim. Note that the receive level of nearby stations (DK1= IS and DF6NM) is being reduced by SpecLab's frequency-selective limiter to avoid overloading and noiseblanker artifact= s.

Thank you very much Dom! Now we're hoping for more and distant signals, lik= e from Spain or U.S. ;-)

73, Markus (DF6NM)


-----Urspr=C3=BCngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org&g= t;
Verschickt: Mi, 3. Okt 2018 14:46
Betreff: LF: EbNaut Autodecoder 137490 Hz

After some playing around, we are running an experimental EbNaut autod= ecoder at DL0AO and DF6NM under Windows. Receive parameters are c= urrently
 137490.000 Hz, 6 char, 3 s, 8K19A crc 16, start hh:00 and hh:30
and preliminary results can be found here (scroll to bottom):
DL0AO: https://vlf.u01.de/LF/LFgrabber/ebnautresults.txt<= br clear=3D"none" abp=3D"636"> DF6NM: http://df6nm.darc.de/opds/ebnautresults.txt

This is nowhere near as perfect as Domenico's Linux solution, and our softw= are contraption is nowhere near a stable state. Anyhow a&nbs= p;few test transmissions with a couple of microwatts radiated pow= er lead to useful decodes, and a trace also appeared in the opds spectrogram at DK7FC. It would be nice to find some more signals= later...

Best 73,
Markus (DF6NM)


-----Urspr=C3=BCngliche Mitteilung-----
Von: Domenico IZ7SLZ <iz7slz.domenico@gmail.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org&g= t;
Verschickt: Di, 2. Okt 2018 1:18
Betreff: Re: LF: 2200M EbNaut Beacon

LF EbNauters,
=
thanks to Markus and Stefan for the comments and to Rob fo= r putting on air a very good signal.
I was also surprised to see the decode achieved by the aut= o-decoder without any time and frequency offset !
Propagation conditions are becoming better, but noise here= is still high.
I tried a deep investigation: no further decode,  but= with an offset of -0.0001 Hz and +0.005s (ooops !) i have improved th= e 2018-09-30_03:00 UT decode:
initial reference phase -62.3 amplitude 2.049e-01
phase   0    0    0  &nbs= p; 0    0
carrier phase: -6.9 deg
carrier Eb/N0: 0.5 dB
carrier Es/N0: -10.10 dB
carrier S/N: 19.87 dB in 672.0 uHz, -11.86 dB in 1Hz, -45.84 dB in 2.5kHz elapsed 58
found rank 43 ber 3.4980e-01 Eb/N0 -0.6 M -7.389708042e+00 ph 0 0,0,0,0 [K3= RWR_FM18QI_73]

Looking on the October 1st recordings, with these offsets,  i got anot= her decode at 02:30 UT:
initial reference phase -6.6 amplitude 2.356e-01
phase   0    0    0  &nbs= p; 0    0
carrier phase: -1.2 deg
carrier Eb/N0: 0.4 dB
carrier Es/N0: -10.23 dB
carrier S/N: 19.74 dB in 672.0 uHz, -11.99 dB in 1Hz, -45.97 dB in 2.5kHz elapsed 58
found rank 84 ber 3.6694e-01 Eb/N0 -1.7 M -7.504411221e+00 ph 0 0,0,0,0 [K3= RWR_FM18QI_73]

QRB  is about 7600 km.
Working conditions here, (vintage =F0=9F=98=80) as usual:<= /div>
- miniwhip (a modified ex-Navtex antenna from Furuno ; see= attachment)
- receiver JRC NRD-92M with external 10 MHz reference sign= al steered by  GPS
- a modest PC (Intel P4 CPU 3.50GHz x2) from scrap with Ub= untu 14.04LTS
- software vlfrx-tool from Paul Nicholson.

I have attached also the latest version of  the bash './autoebnaut' i.= e. the list of the commands that recall vlfrx-tool programs to start the de= coder each 30 minutes.
Other linux programs are running in background:
- vtcard and vttime to manage and calibrate the audio card=
- vtwrite to store audio coming from receiver
- gpsd and chrony to manage the nmea and 1pps from neo8 gp= s (connected at serial COM1) and adjusting the PC Clock.

73, Domenico IZ7SLZ
 

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