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 w87BMdt3023228 for ; Fri, 7 Sep 2018 13:22:41 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fyEmS-0003gV-NJ for rs_out_1@blacksheep.org; Fri, 07 Sep 2018 12:18:28 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fyEmS-0003gM-8T for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 12:18:28 +0100 Received: from mail-oi0-x22c.google.com ([2607:f8b0:4003:c06::22c]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fyEmQ-0000YW-Bu for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 12:18:27 +0100 Received: by mail-oi0-x22c.google.com with SMTP id y207-v6so26487649oie.13 for ; Fri, 07 Sep 2018 04:18:26 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=1ckfObtN9XVnhWC9KpcLE9BkERaFkn81MuahGvtlwdA=; b=St1pWa8Dmc/kODUatYb+iKIjrb8pIMkjpIqxhWFh2HOBrfbtkfKYGHnJSvw7JC+4S1 d8KgDLkhIRsEFSh3nW9dbZXj7DthbXw49ZhjG0ikeMNNYBWZDtyKbEWqzNVrsbvmQYxU JNczdqUExz+ESJaTIrUXP2A+xCKNu+mWWmkg0qSfBj7XQ0LqLNiwN1NmjVSx1WRc4DDS DnHalietW6b7QPsGsg28cniw+99QMTjV8IKCl4xtasehhRZzSuinfVBReQjjhv9EiukP lPTiBxPwU3lLm/WuJ4bEvr5VWKa2oeDaJTsmBi+9sdXkl9RcP9uAyfGpvV9gSSLuUgCZ RE+Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=1ckfObtN9XVnhWC9KpcLE9BkERaFkn81MuahGvtlwdA=; b=T5RDVY+BlyMeNXr4hi7uwxm7uS+7u8Diajl4R4TTpwPSRPx4xOJO3wZEi05LnHSO2E VLsxAD19Sdw5Huj6PnzxHddCeaBJMXLwN/Ydv1XgCmD1+1eBBFm+CyVtQlPLNrVpspFd RS5Mvaept7wJexB+AL/VlReeL896t2otKgYTJ/J8ippRKB3RRCMOfA2ayZWgxlB5hn1d KrDyycxnouFaNceTEAUCGuwdTB5uBnaypb/3zjIHaUMAiAysCqr/nRsnkNIFShHYVJYV A0+BhbEej500EJUjG+JN1Irv5Rxvrnste6Ez6BEmx+7pcmtbPi07fgte3Tsm12AmpG5/ GYpw== X-Gm-Message-State: APzg51BUoQu4JFodGtgAXVFoR1ZJdgyZkEoU5HIFj22Cz4zMjITRsLAX aH0+UcG+r6J+1kX13gTR5qR045SlDCYcRn00miA+qw== X-Google-Smtp-Source: ANB0VdYy8WFbWBv+fp5aoSUgWvu5suEKUtj6r2K7HNM+ILjaYncVPneHQjA+jXnYbzTQ8ACq9ptndylZGcHaOXelZHs= X-Received: by 2002:aca:4784:: with SMTP id u126-v6mr7684030oia.229.1536319103697; Fri, 07 Sep 2018 04:18:23 -0700 (PDT) MIME-Version: 1.0 References: <6DB8451D7F3D3947A5918808A59621EA0860552F@servigilant.vigilant.local> In-Reply-To: <6DB8451D7F3D3947A5918808A59621EA0860552F@servigilant.vigilant.local> From: Domenico IZ7SLZ Date: Fri, 7 Sep 2018 13:17:43 +0200 Message-ID: To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) 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: Hello Luis, thanks for sharing your experiment. My auto-decoder https://www.qsl.net/iz7slz/ is already retuned for your transmissions. BTW QRM is large here in the morning time (urban location). I will try to catch your signal later in the night. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [2607:f8b0:4003:c06:0:0:0:22c listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (iz7slz.domenico[at]gmail.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 X-Scan-Signature: 58ba09640deeac370be75328ed1b0fef Subject: Re: LF: EbNaut transmission test in LF Content-Type: multipart/alternative; boundary="00000000000070054c0575462ad4" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE autolearn=no version=2.63 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 --00000000000070054c0575462ad4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello Luis, thanks for sharing your experiment. My auto-decoder https://www.qsl.net/iz7slz/ is already retuned for your transmissions. BTW QRM is large here in the morning time (urban location). I will try to catch your signal later in the night. *At least the decoder is detecting the carrier but may be there is no proper phase modulation or probably other failures* *What I=E2=80=99m doing wrong ? Can anybody decode the message from the fil= e ?* I also suspect some issues on modulator circuit. Of course the XOR gate is following the /10 divider, is it? Good luck. 73 all, Domenico/IZ7SLZ On Fri, 7 Sep 2018 at 11:38, VIGILANT Luis Fern=C3=A1ndez wrote: > Hi LF EbNauters > > > > I have been building a disciplined Rx for LF, based in a GPS LO at 120KHz > and a NE602 downconverter to 17KHz > > Then feeding the signal to the soundcard, also disciplined with 1pps from > the same GPS > > > > At Tx side a GPS LO at 1374850 Hz divided by 10 provides 0.1Hz steps at > LF. Then an XOR gate is used for > > EbNaut modulation from the DTR of a COM port under Windows. The PA is > just a mosfet driver (mic4452 AT 12v) > > Just about 100mW to antenna but good enough to get a 20dB S/N in my Rx 7K= m > away > > > > Stability looks pretty good and also phase modulation as seen in SL > spectrogram. Also monitoring phase changes > > with the SL plot display window. So, yesterday I tried an EbNaut > transmission with the following setup > > > > Coding: 8K19A > > CRC 16 > > Symbol period: 1s > > Characters: 6 Transmission time: 9.3 minutes > > Transmitting at minute 00 and 30 every hour > > > > I got the FFT files from SL and converted them to WAV files. The > configuration file (SR) included the corrected sample rate > > of the soundcard as well as decimation , FFT length and center frequency > > > > Attached is a WAV file starting at 16:22 which should contain the > transmission started at 16:30 untill about 16:40 > > > > The rawsym graphic shows a clear peak centered in frequency, but I haven= =E2=80=99t > been able to get a decode other than =E2=80=9C******=E2=80=9D > > At least the decoder is detecting the carrier but may be there is no > proper phase modulation or probably other failures > > What I=E2=80=99m doing wrong ? Can anybody decode the message from the fi= le ? > > BTW, I have used a list length of 47274 and also 141823, but nill L > > > > 73 de Luis > > EA5DOM > --00000000000070054c0575462ad4 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hello Luis,

thanks for sharing your experiment. My auto-decoder=C2=A0 https://www.qsl.net/iz7slz/= =C2=A0 is already retuned for your transmissions.

= BTW QRM is large here in the morning time (urban location). I will try to c= atch your signal later in the night.

At least the decoder is dete= cting the carrier but may be there is no proper phase modulation or probabl= y other failures

What I=E2=80=99m doing w= rong ? Can anybody decode the message from the file ?


=C2=A0I also suspect = some issues on modulator circuit. Of course the XOR gate is following the /= 10 divider, is it?

Good luck.

73 all,
Domenico/IZ7SLZ



On Fri, 7 Sep 2018 at 11:38, VIGILANT Luis Fern=C3= =A1ndez <luis@vigi= lant.es> wrote:

Hi LF EbNauters

=C2=A0

I have been building a discipli= ned Rx for LF, based in a GPS LO at 120KHz and a NE602 downconverter to 17K= Hz

Then feeding the signal to the = soundcard, also disciplined with 1pps from the same GPS

=C2=A0

At Tx side a GPS LO at 1374850 = Hz divided by 10 provides 0.1Hz steps at LF. Then an XOR gate is used for

EbNaut modulation from the DTR = of=C2=A0 a COM port under Windows. The PA is just a mosfet driver (mic4452 = AT 12v)

Just about 100mW to antenna but= good enough to get a 20dB S/N in my Rx 7Km away

=C2=A0

Stability looks pretty good and= also phase modulation as seen in SL spectrogram. Also monitoring phase cha= nges

with the SL plot display window= . So, yesterday I tried an EbNaut transmission with the following setup<= /u>

=C2=A0

Coding: 8K19A

CRC 16

Symbol period: 1s=

Characters: 6=C2=A0 =C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Transmission time: 9.3 minutes

Transmitting at minute 00 and 3= 0 every hour

=C2=A0

I got the FFT files from SL and= converted them to WAV files. The configuration file (SR) included the corr= ected sample rate

of the soundcard as well as dec= imation , FFT length and center frequency

=C2=A0

Attached is a WAV file starting= at 16:22 which should contain the transmission started at 16:30 untill abo= ut 16:40

=C2=A0

The rawsym graphic shows a clea= r peak centered in frequency, but I haven=E2=80=99t been able to get a deco= de other than =E2=80=9C******=E2=80=9D

At least the decoder is detecti= ng the carrier but may be there is no proper phase modulation or probably o= ther failures

What I=E2=80=99m doing wrong ? = Can anybody decode the message from the file ?

BTW, I have used a list length = of 47274 and also 141823, but nill L

=C2=A0

73 de Luis=

EA5DOM

--00000000000070054c0575462ad4--