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 w2VLc23m010146 for ; Sat, 31 Mar 2018 23:38:03 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1f2O67-00005Q-0X for rs_out_1@blacksheep.org; Sat, 31 Mar 2018 22:31:39 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1f2O5z-00005H-Gw for rsgb_lf_group@blacksheep.org; Sat, 31 Mar 2018 22:31:31 +0100 Received: from proofpoint-cluster.metrocast.net ([65.175.128.136]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1f2O5w-0000JW-70 for rsgb_lf_group@blacksheep.org; Sat, 31 Mar 2018 22:31:30 +0100 Received: from [192.168.2.10] (d-208-90-143-11.cpe.metrocast.net [208.90.143.11]) (authenticated bits=0) by huckleberry.metrocast.net (8.14.7/8.14.4) with ESMTP id w2VLVNvB053833 for ; Sat, 31 Mar 2018 21:31:24 GMT From: Rob Renoud Mime-Version: 1.0 (1.0) Date: Sat, 31 Mar 2018 17:31:23 -0400 Message-Id: <78190A86-BDB9-4459-8BB9-8FDEF5C2B204@md.metrocast.net> References: <16278b89bdd-1795-85@webjasstg-vaa04.srv.aolmail.net> <1627bedf2dc-1795-3ce@webjasstg-vaa29.srv.aolmail.net> In-Reply-To: To: rsgb_lf_group@blacksheep.org X-Mailer: iPad Mail (15D100) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.19.17,1.0.8,0.0.0000 definitions=2018-03-31_10:2018-03-30,2018-03-31,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=1 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1603290000 definitions=main-1803310225 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: Hi LF EbNauteers, Thank you all for the LF EbNaut reports, analyses, recommendations and comments. All were most excellent and certainly show the promise of EbNaut for amateur contacts on LF. Well done by all! [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 MIME_QP_LONG_LINE RAW: Quoted-printable line longer than 76 chars X-Scan-Signature: caa2bbf6eb61e70e03599bec833fb637 Content-Type: multipart/alternative; boundary=Apple-Mail-E34DCF78-9057-4DF2-8FE9-B92EE1ABF300 Content-Transfer-Encoding: 7bit Subject: Re: LF: EbNaut March 30/31 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_20_30,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 --Apple-Mail-E34DCF78-9057-4DF2-8FE9-B92EE1ABF300 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi LF EbNauteers, Thank you all for the LF EbNaut reports, analyses, recommendations and comme= nts. All were most excellent and certainly show the promise of EbNaut for a= mateur contacts on LF. Well done by all! 73, Rob - K3RWR > On Mar 31, 2018, at 15:31, Riccardo Zoli wrote:= >=20 >=20 > Hi LF, >=20 > Congrats, it's a great achievement, Domenico! > You have a perfect setup and an outstanding RX performance. >=20 > Happy Easter! >=20 > All the best >=20 >=20 > 73 de Riccardo IW4DXW >=20 >=20 >=20 >=20 >=20 >=20 > Il Sab 31 Mar 2018, 18:17 Domenico IZ7SLZ ha s= critto: >> Hello Markus, Riccardo and all, >>=20 >> all last Riccardo's EbNaut transmissions have been copied here in JN80nu (= QRB 630 km) by the 'autodecode' program (log attached). >>=20 >> Thanks to your today's report Markus, i have noted the time offset (about= +0.005 s) to apply at the recordings in order to decode Rob K3RWR (QRB 761= 2 km) and i found only one decode at 03.00 UT of 31-03-2018 ! >> Very very weak signal as shown in the attached plot. >>=20 >> phase 0 0 0 0 0 >> carrier phase: -4.1 deg >> carrier Eb/N0: -0.4 dB >> carrier Es/N0: -11.31 dB >> carrier S/N: 17.93 dB in 595.2 uHz, -14.32 dB in 1Hz, -48.30 dB in 2.5kHz= >> elapsed 75 >> found rank 4467 ber 3.4762e-01 Eb/N0 -0.2 M -1.222081757e+01 ph 0 0,0,0,0= [K3RWR_FM18QI] >>=20 >>=20 >> Setup used here: miniwhip antenna, JRC NRD-92N receiver, 10 MHz reference= oscillator with GPS NEO-8 and Program 'vlfrx-tools'. I made several attempt= s to improve the report by changing -a and -t parameters of 'vtblank' but th= is seems to be the best report. >>=20 >> Many thanks for to Rob and Riccardo for the signals and to Paul Nicholson= for FB vlfrx-tools. >>=20 >> 73 and best wishes for Easter ! >>=20 >> Domenico, IZ7SLZ =20 >>=20 >>=20 >>=20 >>=20 >>=20 >> Thanks to =20 >>=20 >>=20 >>> On 31 March 2018 at 14:00, Markus Vester wrote: >>> Again a strong signal with some error-free decodes from IW4DXW. Also fou= nd K3RWR finally on 137490 Hz, but only once after 4:00, and another near-mi= ss around sunrise after 4:30 (logs attached). >>>=20 >>> Rethinking my frequency suggestion, it may not be ideal to place simulta= neous signals from both sides of the pond so near to each other. EbNaut empl= oys 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 s= tation may spill over an adjacent weak signal (although in principle this co= uld be minimized by orthogonal modulation, using identical symbol timing for= all stations, and frequencies spaced by an exact integer multiple of the co= mmon clockrate). But there are also other disadvantages, like noise-blanker i= nduced crossmodulation and threshold increase. So in the end it may be bette= r to use either separate timeslots or separate subbands, in analogy to our T= A- and Eu-QRSS slots. >>>=20 >>> Best 73,=20 >>> Markus (DF6NM) >>>=20 >>>=20 >>> -----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 >>>=20 >>> Last night Mar 29/30, I got excellent decodes from IW4DXW, but unfortuna= tely not a single one from K3RWR on 137490 Hz. >>>=20 >>> 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 >>>=20 >>> This night, I have scheduled some transmissions every hour (start at xx:= 00). >>>=20 >>> QRG: 137494.99988 >>> 8K19A >>> CRC 20 >>> 3 sec./sym. >>> 6 char >>> duration: 29 min. 36 sec. >>>=20 >>> Reports are welcome. >>>=20 >>> All the best >>>=20 >>> 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= 12 char, CRC 15, 2 sec symbol 8K19 transmission. The first night results o= f this format are very positive! >>>=20 >>> I will transmit this format again this evening (29/30 Mar) and tomorrow (= 30/31 Mar) on frequency 137.490 KHz. >>>=20 >>> Reports and comments welcome. Work is starting this weekend on EbNaut R= X capability for my station. >>>=20 >>> 73, >>> Rob - K3RWR >>>=20 >>>=20 >>=20 --Apple-Mail-E34DCF78-9057-4DF2-8FE9-B92EE1ABF300 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi LF EbNauteers,

Thank you all for the LF EbNaut reports, analyses, recommend= ations and comments.  All were most excellent and certainly show the pr= omise of EbNaut for amateur contacts on LF.

Well do= ne by all!

73,
Rob - K3RWR

= On Mar 31, 2018, at 15:31, Riccardo Zoli <riccardozoli80@gmail.com> wrote:


Hi LF,

Congrats, i= t's a great achievement, Domenico!
You have a perfect= setup and an outstanding RX performance.

<= div dir=3D"auto">Happy Easter!

All the best


73 de Riccardo IW4DXW



<= br>


Il= Sab 31 Mar 2018, 18:17 Domenico IZ7SLZ <iz7slz.domenico@gmail.com<= /a>> ha scritto:
=
Hello Markus, Riccardo  and all,

all l= ast Riccardo's EbNaut transmissions have been copied here in JN80nu (QRB 630= km) by the 'autodecode' program (log attached).

Thanks to your= today's report Markus, i have noted the time offset (about +0.005 s) to app= ly at the recordings  in order to decode Rob K3RWR (QRB 7612 km) and i f= ound only one decode at 03.00 UT of 31-03-2018 !
Very very weak sig= nal as shown in the attached plot.

phase   0  &nb= sp; 0    0    0    0
carrier= phase: -4.1 deg
carrier Eb/N0: -0.4 dB
carrier Es/N0: -11.31 dB
ca= rrier S/N: 17.93 dB in 595.2 uHz, -14.32 dB in 1Hz, -48.30 dB in 2.5kHz
e= lapsed 75
found rank 4467 ber 3.4762e-01 Eb/N0 -0.2 M -1.222081757e+01 ph= 0 0,0,0,0 [K3RWR_FM18QI]


Setup used here: miniwhip an= tenna, JRC NRD-92N receiver, 10 MHz reference oscillator with GPS NEO-8 and P= rogram 'vlfrx-tools'. I made several attempts to improve the report by chang= ing -a and -t parameters of 'vtblank' but this seems to be the best report.<= br>
Many thanks for to Rob and Riccardo for the signals and to= Paul Nicholson for FB vlfrx-tools.

73 and best wishes for= Easter !

Domenico, IZ7SLZ  


<= br>

Thanks to 


On 31 March 2018 at 14:00= , Markus Vester <markusvester@aol.com&g= t; wrote:
Again a strong si= gnal with some error-free decodes from IW4DXW. Also found K3RWR finally on 1= 37490 Hz, but only once after 4:00, and another near-miss around sunrise aft= er 4:30 (logs attached).

Rethinking my frequency suggestion, i= t 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 t= he 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 s= ignal (although in principle this could be minimized by orthogonal modulatio= n, using identical symbol timing for all stations, and frequencies spac= ed by an exact integer multiple of the common clockrate). But there are also= other disadvantages, like noise-blanker induced crossmodulation and thresho= ld 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.
Best 73,
Markus (DF6NM)


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

Last night Mar 29/30, I got excellent decodes fr= om 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 19:53

=

Hi LF

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

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

Reports are welcome.

All th= e best

73 de Riccardo IW4DXW
______________________________________=
Re: LF: K3RWR LF EbNaut Trial #2 
Von: Rob Renoud <k3rwr@md.metrocast.net>
An: rsgb_lf_group <rsgb_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 o= f a 12 char, CRC 15, 2 sec symbol 8K19 transmission.  The first night r= esults of this format are very positive!

I will transmit this format a= gain this evening (29/30 Mar) and tomorrow (30/31 Mar) on frequency 137.490 K= Hz.

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

73,
Rob - K3RWR



= --Apple-Mail-E34DCF78-9057-4DF2-8FE9-B92EE1ABF300--