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 w87BDnYw023192 for ; Fri, 7 Sep 2018 13:13:52 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fyEdA-0003Vy-FO for rs_out_1@blacksheep.org; Fri, 07 Sep 2018 12:08:52 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fyEd8-0003Vp-3o for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 12:08:50 +0100 Received: from out1-22.antispamcloud.com ([185.201.16.22]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fyEd3-0000W4-P3 for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 12:08:49 +0100 Received: from 132.178.216.87.static.jazztel.es ([87.216.178.132] helo=servigilant.vigilant.es) by mx64.antispamcloud.com with esmtpsa (TLSv1:ECDHE-RSA-AES128-SHA:128) (Exim 4.89) (envelope-from ) id 1fyEaX-0004Qi-LK for rsgb_lf_group@blacksheep.org; Fri, 07 Sep 2018 13:08:39 +0200 Received: from servigilant.vigilant.local ([fe80::c40d:8140:d722:5448]) by servigilant.vigilant.local ([fe80::c40d:8140:d722:5448%13]) with mapi id 14.03.0123.003; Fri, 7 Sep 2018 13:03:47 +0200 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: EbNaut transmission test in LF Thread-Index: AdRGi/jOU9uSWjrLSayXBc2Wbfptkf//9fOA///bxfA= Date: Fri, 7 Sep 2018 11:03:46 +0000 Message-ID: <6DB8451D7F3D3947A5918808A59621EA0860562D@servigilant.vigilant.local> References: <6DB8451D7F3D3947A5918808A59621EA0860552F@servigilant.vigilant.local> <5B92567B.2030206@posteo.de> In-Reply-To: <5B92567B.2030206@posteo.de> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.22] MIME-Version: 1.0 X-Originating-IP: 87.216.178.132 X-MailAssure-Domain: vigilant.es X-MailAssure-Username: smtpsolarwinds Authentication-Results: antispamcloud.com; auth=pass (login) smtp.auth=smtpsolarwinds@vigilant.es X-MailAssure-Outgoing-Class: ham X-MailAssure-Outgoing-Evidence: Combined (0.23) X-Recommended-Action: accept X-Filter-ID: EX5BVjFpneJeBchSMxfU5qMBvZ/d3ReESKBFKFeLWp1602E9L7XzfQH6nu9C/Fh9KJzpNe6xgvOx q3u0UDjvOw5j2C7YKailx2Uop+U2Gs8m9etQhNgzEtWqBtUXOJSHVTGbEWWnE2yTxqfzAQugcZZP lX6Xt82ZjfmHXHK5aJFIeZjZv1oz6oWKgngYgisM8DZztKGImYzpwtV2u5Ajton/Eqyk9Htj+avx kUvxcoD70WuzEeIYESIPDdUJWOBuPxO0jJAHsPdj1H6RNuBO6wRQ9YofvcbjcR4EECU4TAHOXBLx 0a60v73FZCXh5nEVACQHwPTDFXEPVlYw9avkW2Q7hh4wb2KKVjg9stRYt+koEiwpocbVu0nnL/Ni 3pdFfNIIfXXHaPnmTS9BbIiM1U5lBnskkphd4sLN8tb0FI4YH6QrpfZiTMRk4xXw0fBcC3Nqbc+E pNDuMMXgyD7p2tYLAvKC1zHldj/T9Lzwwpkgr/U0flMcy2Vi/IcBgY4aV9RsXK5hbay6GIP6nWYE /hd7JAtl5tG50h1ePb8uOfrKWI8N0qcImQqSeb6nSlZ9A50/1jpzB0UrpF4jS0uRf9PpDvje3Bwt hwofpGug0l9SlfBvgqrSE9cq+LB4DwkHcgheOSsogAVKfjX2v8XmmrjYAcbCi8FtYiieeyBiEdLx PrWMDeKnm08o/HZlcKZ/BBJ9tYvX5adsNW+kkNPsA29Gl1D47SRezCxR4i0JWtYNtjbohvEBQL0T wqb81mqDwgi6lCYP8iQnGa6SXEeVrAQj2ILh0vd/W/tgJeuTtlVm4zuNRcgRKiGg7nXFaZTxzxBW grznkIq8e5nuTRwXlnr34BgzWI1YPfm4MaGtbGDY/v3mrFW5c8sA9ysLUU1NwqRDrXjnlbKxiZlo lOd/O1Zh+UlCA/FZtZnaTLsgK5KPx3MdA8s7VYLZOgbj6KZdkVWClPVvbW5lVyQanRxw5nS7vjsc SPEFPdhcWrmN1CHAqkOfCEirYNMutG8siqxgMS+4ayUpOtEhdxekWDmK9g== X-Report-Abuse-To: spam@quarantine3.antispamcloud.com X-Spam-Score: 0.3 (/) 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: Hi Stefan, EbNaut Not sure if the phase is exactly shifted 180º but should be. I pass the 137KHz signal trought an XOR gate, the other input of the XOR is controlled by the DTR level of a COM port under windows. I use Paul's "ebnaut-tx.exe" for windows http://abelian.org/ebnaut/win32/ebnaut-tx.exe [...] Content analysis details: (0.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [185.201.16.22 listed in list.dnswl.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 T_KAM_HTML_FONT_INVALID BODY: Test for Invalidly Named or Formatted Colors in HTML 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: d7e11363ac319cfd7f6e42df098e1b8e Subject: RE: LF: EbNaut transmission test in LF Content-Type: multipart/alternative; boundary="_000_6DB8451D7F3D3947A5918808A59621EA0860562Dservigilantvigi_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_40_50,HTML_MESSAGE, TO_ADDRESS_EQ_REAL 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 --_000_6DB8451D7F3D3947A5918808A59621EA0860562Dservigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan, EbNaut Not sure if the phase is exactly shifted 180=BA but should be. I pass the 1= 37KHz signal trought an XOR gate, the other input of the XOR is controlled by the DTR level of a COM port under windows. I use Paul's "e= bnaut-tx.exe" for windows http://abelian.org/ebnaut/win32/ebnaut-tx.exe Yes. The carrier is transmitted permanently and then there is phase modulat= ion for the transmission periods Not using SpecLab for Tx. Just for Rx The message is my callsign. Six characters. EA5DOM Thank you for the tips. Sure there are other message configurations which s= hould be more apropiate for a first test Unfortunately this weekend we have a lot of storms and thunders. So can not= keep transmitting, but may be a local signal should work close to the Rx 73 de Luis EA5DOM De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blackshe= ep.org] En nombre de DK7FC Enviado el: viernes, 07 de septiembre de 2018 12:44 Para: rsgb_lf_group@blacksheep.org Asunto: Re: LF: EbNaut transmission test in LF Hi Luis, Are you sure that the phase shift is 180 deg? At 180 deg there should be no= peak in the red spectrum (Markus' tool show_rawsyms3b). Are you transmitti= ng the carrier permanently and just do the keying for those 9.3 minutes? Th= en maybe there is just a timing problem. Do you generate the RS232 keying with SpecLab? If so, do you consider SpecL= ab's internal time offset of 0.3 seconds + 4/samplerate? Here it is 0.812 s= econds, which is a very significant part of the symbol length and thus most= important to consider. However i'm not sure if this also applies when usin= g the serial interface... Can you tell me the message? It is easier to find the reason when already k= nowing the message. 73, Stefan Am 07.09.2018 11:28, schrieb VIGILANT Luis Fern=E1ndez: Hi LF EbNauters I have been building a disciplined Rx for LF, based in a GPS LO at 120KHz a= nd a NE602 downconverter to 17KHz Then feeding the signal to the soundcard, also disciplined with 1pps from t= he 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 7Km = away Stability looks pretty good and also phase modulation as seen in SL spectro= gram. Also monitoring phase changes with the SL plot display window. So, yesterday I tried an EbNaut transmissi= on 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 configurat= ion 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 transmiss= ion started at 16:30 untill about 16:40 The rawsym graphic shows a clear peak centered in frequency, but I haven't = been able to get a decode other than "******" At least the decoder is detecting the carrier but may be there is no proper= phase modulation or probably other failures What I'm doing wrong ? Can anybody decode the message from the file ? BTW, I have used a list length of 47274 and also 141823, but nill :( 73 de Luis EA5DOM --_000_6DB8451D7F3D3947A5918808A59621EA0860562Dservigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Stefan, EbNaut=

 

Not sur= e if the phase is exactly shifted 180=BA but should be. I pass the 137KHz s= ignal trought an XOR gate, the other input of the XOR

is cont= rolled by the DTR level of a COM port under windows. I use Paul’s = 220;ebnaut-tx.exe” for windows

http://abelian.org/ebnau= t/win32/ebnaut-tx.exe

&n= bsp;

Yes. Th= e carrier is transmitted permanently and then there is phase modulation for= the transmission periods

&n= bsp;

Not usi= ng SpecLab for Tx. Just for Rx

&n= bsp;

The mes= sage is my callsign. Six characters. EA5DOM

&n= bsp;

Thank y= ou for the tips. Sure there are other message configurations which should b= e more apropiate for a first test

Unfortu= nately this weekend we have a lot of storms and thunders. So can not keep t= ransmitting, but may be a local signal

should = work close to the Rx

&n= bsp;

73 de L= uis

EA5DOM<= o:p>

&n= bsp;

De: owner-rsgb_lf_group@blacksheep.org [mail= to:owner-rsgb_lf_group@blacksheep.org] En nombre de DK7FC
Enviado = el: vie= rnes, 07 de septiembre de 2018 12:44
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: LF: EbNaut transmission test in LF

 

Hi Luis,

Are you sure that the phase shift is 180 deg? At 180 deg there should be no= peak in the red spectrum (Markus' tool show_rawsyms3b). Are you transmitti= ng the carrier permanently and just do the keying for those 9.3 minutes? Th= en maybe there is just a timing problem.

Do you generate the RS232 keying with SpecLab? If so, do you consider SpecL= ab's internal time offset of 0.3 seconds + 4/samplerate? Here it is 0.8= 12 seconds, which is a very significant part of the symbol length and thus = most important to consider. However i'm not sure if this also applies when using the serial interface...

Can you tell me the message? It is easier to find the reason when already k= nowing the message.

73, Stefan

Am 07.09.2018 11:28, schrieb VIGILANT Luis Fern=E1ndez:

Hi LF EbNauters

 

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

 

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 7Km away

 

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

 

Coding: 8K19A=

CRC 16

Symbol period: 1s

Characters: 6    = ;      Transmission time: 9.3 minutes<= o:p>

Transmitting at minute 00 and 3= 0 every hour

 

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

 

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

 

The rawsym graphic shows a clea= r peak centered in frequency, but I haven’t been able to get a decode= other than “******”

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’m doing wrong ? Ca= n anybody decode the message from the file ?

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

 

73 de Luis

EA5DOM

--_000_6DB8451D7F3D3947A5918808A59621EA0860562Dservigilantvigi_--