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 w2VC9ZoN008382 for ; Sat, 31 Mar 2018 14:09:38 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1f2FBQ-0005Xu-7A for rs_out_1@blacksheep.org; Sat, 31 Mar 2018 13:00:32 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1f2FBF-0005Xj-Js for rsgb_lf_group@blacksheep.org; Sat, 31 Mar 2018 13:00:21 +0100 Received: from omr-a004e.mx.aol.com ([204.29.186.52]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1f2FBC-0006ws-86 for rsgb_lf_group@blacksheep.org; Sat, 31 Mar 2018 13:00:20 +0100 Received: from mtaomg-mbc02.mx.aol.com (mtaomg-mbc02.mx.aol.com [172.26.221.144]) by omr-a004e.mx.aol.com (Outbound Mail Relay) with ESMTP id 0573038000A1; Sat, 31 Mar 2018 08:00:16 -0400 (EDT) Received: from core-acd05f.mail.aol.com (core-acd05.mail.aol.com [172.27.22.15]) by mtaomg-mbc02.mx.aol.com (OMAG/Core Interface) with ESMTP id AC18D38000081; Sat, 31 Mar 2018 08:00:15 -0400 (EDT) Received: from 188.194.222.230 by webjasstg-vaa29.srv.aolmail.net (10.96.25.32) with HTTP (WebMailUI); Sat, 31 Mar 2018 08:00:14 -0400 Date: Sat, 31 Mar 2018 08:00:15 -0400 From: Markus Vester To: markusvester@aol.com, rsgb_lf_group@blacksheep.org Message-Id: <1627bedf2dc-1795-3ce@webjasstg-vaa29.srv.aolmail.net> In-Reply-To: <16278b89bdd-1795-85@webjasstg-vaa04.srv.aolmail.net> References: <16278b89bdd-1795-85@webjasstg-vaa04.srv.aolmail.net> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.194.222.230] x-aol-global-disposition: G X-AOL-VSS-INFO: 5800.7501/127996 X-AOL-VSS-CODE: clean DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1522497616; bh=JXTf5AIzBg9VJfJgMERdrPAHnAExfECBhTJt7se5GyU=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=2NsWwcF7cyDMJY9NOdwk4T5XL+5YAABEo68SXv/Gj2+Xi8DVD60ZsxGu0FsvfmD5F 4csuc/ra2rGD8Q1VNKjnSkdw5Ln+h1OFxDy4boBhzErCFPLZ2DfvNw8wGB3ZVUQ2sh cx/icYOR/ejchy3edLMNPc1WZKWDpzDMouVgCnpQ= x-aol-sid: 3039ac1add905abf784f54cb 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 the administrator of that system for details. Content preview: Again a strong signal with some error-free decodes from IW4DXW. Also found K3RWR finally on 137490 Hz, but only once after 4:00, and another near-miss around sunrise after 4:30 (logs attached). Rethinking my frequency suggestion, it may not be ideal to place simultaneous signals from both sides of the pond so near to each other. EbNaut employs hard-keyed phase switching both for the transmitter and for the matched filter in the receive software, so keying sidebands or aliasing from a near station may spill over an adjacent weak signal (although in principle this could be minimized by orthogonal modulation, using identical symbol timing for all stations, and frequencies spaced by an exact integer multiple of the common clockrate). But there are also other disadvantages, like noise-blanker induced crossmodulation and threshold increase. So in the end it may be better to use either separate timeslots or separate subbands, in analogy to our TA- and Eu-QRSS slots. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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: 16a6530e4735ccb856cf9bc7c6cb9773 Subject: Re: LF: EbNaut March 30/31 Content-Type: multipart/mixed; boundary="----=_Part_1148_847293570.1522497614555" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=HTML_MESSAGE, MAILTO_TO_SPAM_ADDR 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 ------=_Part_1148_847293570.1522497614555 Content-Type: multipart/alternative; boundary="----=_Part_1147_88189125.1522497614555" ------=_Part_1147_88189125.1522497614555 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Again a strong signal with some error-free decodes from IW4DXW. Also found = K3RWR finally on 137490 Hz, but only once after 4:00, and another near-miss= around sunrise after 4:30 (logs attached). Rethinking my frequency suggestion, it may not be ideal to place simultaneo= us signals from both sides of the pond so near to each other. EbNaut employ= s hard-keyed phase switching both for the transmitter and for the matched f= ilter in the receive software, so keying sidebands or aliasing from a near = station may spill over an adjacent weak signal (although in principle this = could be minimized by orthogonal modulation, using identical symbol timing = for all stations, and frequencies spaced by an exact integer multiple of th= e common clockrate). But there are also other disadvantages, like noise-bla= nker induced crossmodulation and threshold increase. So in the end it may b= e better to use either separate timeslots or separate subbands, in analogy = to our TA- and Eu-QRSS slots. Best 73,=20 Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Markus Vester An: rsgb_lf_group Verschickt: Fr, 30. Mrz 2018 23:03 Betreff: LF: EbNaut March 29/30 Last night Mar 29/30, I got excellent decodes from IW4DXW, but unfortunatel= y not a single one from K3RWR on 137490 Hz. Best 73,=20 Markus (DF6NM) ______________________________________ LF: EbNaut attempt at 137495 kHz =20 Von: Riccardo Zoli =20 An: LF Group =20 Datum: Do, 29. Mrz 2018 19:53=20 Hi LF This night, I have scheduled some transmissions every hour (start at xx:00)= . QRG: 137494.99988 8K19A CRC 20 3 sec./sym. 6 char duration: 29 min. 36 sec. Reports are welcome. All the best 73 de Riccardo IW4DXW ______________________________________ Re: LF: K3RWR LF EbNaut Trial #2 =20 Von: Rob Renoud =20 An: rsgb_lf_group =20 Datum: Do, 29. Mrz 2018 21:22=20 TU all for LF EbNaut reception reports for my 28/29 March 2018 trial of a 1= 2 char, CRC 15, 2 sec symbol 8K19 transmission. The first night results of= this format are very positive! I will transmit this format again this evening (29/30 Mar) and tomorrow (30= /31 Mar) on frequency 137.490 KHz. Reports and comments welcome. Work is starting this weekend on EbNaut RX = capability for my station. 73, Rob - K3RWR ------=_Part_1147_88189125.1522497614555 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Again a strong signal with some error-free decodes from = IW4DXW. Also found K3RWR finally on 137490 Hz, but only once after 4:00, an= d another near-miss around sunrise after 4:30 (logs attached).

Rethinking my frequency suggestion, it may not be ideal to place s= imultaneous signals from both sides of the pond so near to each other. EbNa= ut employs hard-keyed phase switching both for the transmitter and for the = matched filter in the receive software, so keying sidebands or aliasing fro= m a near station may spill over an adjacent weak signal (although in princi= ple this could be minimized by orthogonal modulation, using identical symbo= l timing for all stations, and frequencies spaced by an exact integer = multiple of the common clockrate). But there are also other disadvantages, = like noise-blanker induced crossmodulation and threshold increase. So in th= e end it may be better to use either separate timeslots or separate subband= s, in analogy to our TA- and Eu-QRSS slots.

Best 73, <= br>Markus (DF6NM)


-----Urspr=C3=BCngliche Mitteilung-----
Vo= n: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb= _lf_group@blacksheep.org>
Verschickt: Fr, 30. Mrz 2018 23:03
Betre= ff: LF: EbNaut March 29/30

Last night Mar 29/30, I got e= xcellent decodes from IW4DXW, but unfortunately not a single one from K3RWR= on 137490 Hz.

Best 73,
Markus (DF6NM)
_______________________= _______________
LF: EbNaut attempt at 137495 kHz 
Von: Riccardo= Zoli <riccardozoli80@gmail.= com>
An: LF Group <rsgb_lf_group@blacksheep.org>
Datum: Do, 29. Mrz 2018 19:5= 3

Hi LF

This night, I have scheduled some transmissions every = hour (start at xx:00).

QRG: 137494.99988
8K19A
CRC 20
3 sec.= /sym.
6 char
duration: 29 min. 36 sec.

Reports are welcome.

=

All the best

73 de Riccardo IW4DXW
____________________________= __________
Re: LF: K3RWR LF EbNaut Trial #2 
Von: Rob Renoud &l= t;k3rwr@md.metrocast.net> =
An: rsgb_lf_group <r= sgb_lf_group@blacksheep.org>
Datum: Do, 29. Mrz 2018 21:22

<= p>TU all for LF EbNaut reception reports for my 28/29 March 2018 trial of a= 12 char, CRC 15, 2 sec symbol 8K19 transmission.  The first night res= ults of this format are very positive!

I will transmit this format ag= ain this evening (29/30 Mar) and tomorrow (30/31 Mar) on frequency 137.490 = KHz.

Reports and comments welcome.   Work is starting this = weekend on EbNaut RX capability for my station.

73,
Rob - K3RWR


------=_Part_1147_88189125.1522497614555-- ------=_Part_1148_847293570.1522497614555 Content-Type: text/plain; charset=us-ascii; name=k3rwr_df6nm_180331_logs.txt Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=k3rwr_df6nm_180331_logs.txt ebnaut-rx V0.8 input file 03310416.wav sample rate 114.855200 per second rx frequency 137499.9825 file start time 2018-03-31 03:57:13.810 polynomial 8K19A crc size 15 number of chars 12 block size 87 symbol period 2.000 number of symbols 840 start offset 166.200 freq offset -9.982500 cores 2 list length 20000 skipped 166.200573 seconds to start initial reference phase -34.4 --------------------------------------------- found K3RWR_FM18QI list rank 0 reference phase 0,0,0,0 carrier S/N 18.65 dB in 595.2 uHz, -13.60 dB in 1Hz, -47.58 dB in 2.5kHz carrier Es/N0 -10.59 dB carrier Eb/N0 0.30 dB info bit period 24.56 seconds symbol error rate 259/840 = 30.833 % Es/N0 from symbol errors -9.0 dB Eb/N0 from symbol errors 1.9 dB Shannon capacity 217.2 bits/hour Shannon efficiency 67.5 % symbols file 03310416-symbols.csv elapsed 1 seconds --------------------------------------------- found K3RWR_FM18QI list rank 0 reference phase -30,-30,0,0 carrier S/N 19.13 dB in 595.2 uHz, -13.12 dB in 1Hz, -47.10 dB in 2.5kHz carrier Es/N0 -10.11 dB carrier Eb/N0 0.78 dB info bit period 24.56 seconds symbol error rate 249/840 = 29.643 % Es/N0 from symbol errors -8.4 dB Eb/N0 from symbol errors 2.5 dB Shannon capacity 241.6 bits/hour Shannon efficiency 60.7 % symbols file 03310416-symbols.csv elapsed 43 seconds ebnaut-rx V0.8 input file 03310446.wav sample rate 114.855200 per second rx frequency 137499.9825 file start time 2018-03-31 04:27:13.810 polynomial 8K19A crc size 15 number of chars 12 block size 87 symbol period 2.000 number of symbols 840 start offset 166.200 freq offset -9.982500 cores 2 list length 20000 skipped 166.200573 seconds to start initial reference phase 88.7 --------------------------------------------- found K3RORN2M? EC list rank 1703 reference phase -150,-150,-150,-150 carrier S/N 17.05 dB in 595.2 uHz, -15.20 dB in 1Hz, -49.18 dB in 2.5kHz carrier Es/N0 -12.19 dB carrier Eb/N0 -1.30 dB info bit period 24.56 seconds symbol error rate 308/840 = 36.667 % Es/N0 from symbol errors -12.3 dB Eb/N0 from symbol errors -1.4 dB Shannon capacity 152.3 bits/hour Shannon efficiency 96.2 % symbols file 03310446-symbols.csv elapsed 8 seconds ------=_Part_1148_847293570.1522497614555--