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 x0NDRh2H017865 for ; Wed, 23 Jan 2019 14:27:45 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gmIRv-000836-QR for rs_out_1@blacksheep.org; Wed, 23 Jan 2019 13:20:11 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gmIRm-00082w-0U for rsgb_lf_group@blacksheep.org; Wed, 23 Jan 2019 13:20:02 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1gmIRj-0004Gg-OB for rsgb_lf_group@blacksheep.org; Wed, 23 Jan 2019 13:20:00 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id AA1BF2400E5 for ; Wed, 23 Jan 2019 14:19:54 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1548249596; bh=a8NgL3qgPvevRNxpvUNwJccJxmbZvJmeodVShkgxBrM=; h=Date:From:To:Subject:From; b=SnwsZ9VjSiF0rAIK7Ew8HVm5n73dhuXXE5f5579cwzOMxCjEWTcOtQcDL8dYFGp2Q YfkzrimxuqsFyM142u0aIMSw5KdvmsK8W68/AJWzI5wpEHAzzmQxSkMNZMwwOlt2Mq iXgAxsf1H3XIabeLUkgjJPrOwqgvIky38bHRKfIKuj8u04Zu1g++1/AW9HeTBkAJ0F SMeGlTUmfODDxpnyCUcjdSsiidcKOxWAoICudxuXJkWAeMX3iqW5xS/sIOdMT5sMpB 9ARktOFgm9fuc924BUq0j81ecufHLExJYkx246RMzmjZqT5nOiuLmwpI+pFrXFtD/l 5u3WJARJYZVXQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 43l5Vd5SJ9z9rxY for ; Wed, 23 Jan 2019 14:19:52 +0100 (CET) Message-ID: <5C4869F8.5060703@posteo.de> Date: Wed, 23 Jan 2019 14:19:52 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <1541712573053.31739@kuleuven.be> <5C3F2E54.1080204@posteo.de> <5C44B472.9090901@posteo.de> <1UTCP1TTXz.GTBnkuWTAJs@optiplex980-pc> <1UTCP1tymN.HCrj4Hc5Ogz@optiplex980-pc> <8B74554DD9CC447AA7826347ACFA2369@DELL4> <1UTCRCaEyH.MEMhnQf8VB0@optiplex980-pc> <39F4B622-3145-438E-A048-FBABC6A174A1@md.metrocast.net> In-Reply-To: <39F4B622-3145-438E-A048-FBABC6A174A1@md.metrocast.net> X-Spam-Score: -2.3 (--) 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 Rob, Jay, You need to select a lower list length if CRC8 is used together with 8 characters. See http://abelian.org/ebnaut/calc.php?sndb=20&snbws=&snmps=1776&code=8K19&sp=3&crc=8&nc=8&submit=Calculate to calcul [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.66 listed in list.dnswl.org] -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: ca106b06b6ccff7e79a253db5c71bd8f Subject: Re: LF: EbNaut tonite Content-Type: multipart/alternative; boundary="------------050500000903040609090908" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=HTML_30_40,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 This is a multi-part message in MIME format. --------------050500000903040609090908 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi Rob, Jay, You need to select a lower list length if CRC8 is used together with 8 characters. See http://abelian.org/ebnaut/calc.php?sndb=20&snbws=&snmps=1776&code=8K19&sp=3&crc=8&nc=8&submit=Calculate to calculate the optimum list length. It is 280 for a full phase search. If you keep the default 20000, then a number of false decodes are highly likely. 73, Stefan Am 23.01.2019 13:31, schrieb Rob Renoud: > Riccardo and Jay, > > No decodes here either. Had a number of low Rank false decodes also. > Suspect the low CRC may have allowed the false decodes. I had > similar results during the previous run. > > Suggest a shorter character message with a higher CRC with a similar > duration. Also, if possible, suggest transmitting the message on the > hour and running an unmodulated carrier during the idle period to > enable monitoring with ARGO or a similar app. I have found this very > useful tool with EbNaut transmissions from VO1NA and K3SIW on 2200m > and 185.185... kHz (LoFER) respectively. > > 73, > Rob - K3RWR > > On Jan 23, 2019, at 06:17, "jrusgrove@comcast.net > " > wrote: > >> Riccardo >> Late start last night (0000z). Unfortunately no decodes. There were >> numerous low Rank false decodes ... not sure what's up with that! >> Jay W1VD >> >> *----- Original Message -----* >> *From:* Riccardo Zoli > > >> *Reply-To:* > > >> *To:* LF Group > > >> *Sent:* 1/22/2019 2:48:00 PM >> *Subject:* Re: LF: EbNaut tonite >> ------------------------------------------------------------------------ >> >> Sorry: message repeated *every 30 minutes*. >> >> 73, Riccardo IW4DXW >> >> Il giorno Mar 22 Gen 2019, 20:15 Riccardo Zoli >> > ha >> scritto: >> >> >> Jay, Rob, LF >> >> *QRG 137545 Hz* >> *Coding 8K19A* >> *CRC 8* >> *3 sec./sym.* >> *8 characters* >> *duration 29 min. 36 sec.* >> *no time delay* >> *(1st on 1930 UTC, last on 0700 UTC)* >> >> Reports are welcome >> >> >> All the best >> >> 73 de Riccardo IW4DXW >> >> >> >> Il giorno Lun 21 Gen 2019, 23:03 > > ha scritto: >> >> Riccardo >> Glad to hear you found the problem. Will await your >> announcement and look for your signal tomorrow night. >> Jay W1VD >> >> ----- Original Message ----- >> *From:* Riccardo Zoli >> *To:* LF Group >> *Sent:* Monday, January 21, 2019 4:13 PM >> *Subject:* Re: LF: EbNaut tonite >> >> >> Jay, Rob, Markus, Stefan, Joe, LF >> >> >> Jay, thanks again for the decode: congrats for your >> rx setup. >> And thank you so much for trying, Rob. >> >> Here, the TP2 reference signal (not sufficiently >> filtered) overshot sometimes the quadrature divider >> (x4) causing that phase jumps. The problem is now fixed. >> >> A new TX EbNaut session is scheduled for starting >> tomorrow evening. >> >> All the best >> >> >> 73 de Riccardo IW4DXW >> >> >> >> >> >> >> >> Il giorno Lun 21 Gen 2019, 13:20 >> jrusgrove@comcast.net >> > > ha scritto: >> >> Riccardo >> Corrected decode: >> 0300 Rank 0 car Eb/N0 2.3 Eb/N0 1.4 FBDECODE >> Jay W1VD >> >> *----- Original Message -----* >> *From:* > > >> *Reply-To:* > > >> *To:* > > >> *Sent:* 1/21/2019 6:53:39 AM >> *Subject:* Re: LF: EbNaut tonite >> ------------------------------------------------------------------------ >> Stefan, Riccardo & EbNaut-eers >> Stefan ... good copy throughout the night. >> Riccardo ... unfortunately only one decode to >> report. Markus noted a frequency error >> ... curious if propagation or NE0-M8T? >> 137545 >> 2200 Rank 0 car Eb/N0 9.5 Eb/N0 9.2 RADIO GAGA >> 2300 - >> 0000 Rank 0 car Eb/N0 9.2 Eb/N0 9.3 RADIO GAGA >> 0100 Rank 0 car Eb/N0 6.0 Eb/N0 6.0 RADIO GAGA >> 0200 Rank 0 car Eb/N0 5.3 Eb/N0 5.9 RADIO GAGA >> 0300 Rank 0 car Eb/N0 6.1 Eb/N0 6.8 RADIO GAGA >> 0400 Rank 0 car Eb/N0 11.3 Eb/N0 10.4 RADIO GAGA >> 0500 Rank 0 car Eb/N0 3.7 Eb/N0 4.6 RADIO GAGA >> 0600 Rank 0 car Eb/N0 10.6 Eb/N0 10.2 RADIO GAGA >> 137547 >> 0300 Rank 0 car Eb/N0 10.0 Eb/N0 FBDECODE >> Jay W1VD >> >> *----- Original Message -----* >> *From:* DK7FC > > >> *Reply-To:* > > >> *To:* > > >> *Sent:* 1/20/2019 12:48:34 PM >> *Subject:* LF: EbNaut tonite >> ------------------------------------------------------------------------ >> LF, >> >> Tonite: >> >> *f = 137.545 kHz >> Start time: 20.JAN.2019 22:00:00.3 UTC >> (hourly, including 6 UTC) >> Symbol period: 1 s >> Characters: 10 >> CRC bits: 12 >> Coding 16K21A >> Antenna current: 4 A >> Duration: 24:32 [mm:ss]* >> >> >> 73, Stefan >> --------------050500000903040609090908 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Rob, Jay,

You need to select a lower list length if CRC8 is used together with 8 characters.
See http://abelian.org/ebnaut/calc.php?sndb=20&snbws=&snmps=1776&code=8K19&sp=3&crc=8&nc=8&submit=Calculate to calculate the optimum list length. It is 280 for a full phase search. If you keep the default 20000, then a number of false decodes are highly likely.

73, Stefan

Am 23.01.2019 13:31, schrieb Rob Renoud:
Riccardo and Jay,

No decodes here either.  Had a number of low Rank false decodes also.  Suspect the low CRC  may have allowed the false decodes.  I had similar results during the previous run.

Suggest a shorter character message with a higher CRC with a similar duration.  Also, if possible,  suggest transmitting the message on the hour and running an unmodulated carrier during the idle period to enable monitoring with ARGO or a similar app.  I have found this very useful tool with EbNaut transmissions from VO1NA and K3SIW on 2200m and 185.185... kHz (LoFER) respectively.

73,
Rob - K3RWR

On Jan 23, 2019, at 06:17, "jrusgrove@comcast.net" <jrusgrove@comcast.net> wrote:

Riccardo
 
Late start last night (0000z). Unfortunately no decodes. There were numerous low Rank false decodes ... not sure what's up with that!
 
Jay W1VD
 
 
----- Original Message -----
From: Riccardo Zoli <riccardozoli80@gmail.com>
Sent: 1/22/2019 2:48:00 PM
Subject: Re: LF: EbNaut tonite

Sorry: message repeated every 30 minutes.

73, Riccardo IW4DXW

Il giorno Mar 22 Gen 2019, 20:15 Riccardo Zoli <riccardozoli80@gmail.com> ha scritto:

Jay, Rob, LF

QRG 137545 Hz
Coding 8K19A
CRC 8
3 sec./sym.
8 characters
duration 29 min. 36 sec.
no time delay
(1st on 1930 UTC, last on 0700 UTC)

Reports are welcome


All the best

73 de Riccardo IW4DXW



Il giorno Lun 21 Gen 2019, 23:03 <jrusgrove@comcast.net> ha scritto:
Riccardo
 
Glad to hear you found the problem. Will await your announcement and look for your signal tomorrow night.
 
Jay W1VD
----- Original Message -----
Sent: Monday, January 21, 2019 4:13 PM
Subject: Re: LF: EbNaut tonite


Jay, Rob, Markus, Stefan, Joe, LF


Jay, thanks again for the decode: congrats for your rx setup.
And thank you so much for trying, Rob.

Here, the TP2 reference signal (not sufficiently filtered) overshot sometimes the quadrature divider (x4) causing that phase jumps. The problem is now fixed.

A new TX EbNaut session is scheduled for starting tomorrow evening.

All the best


73 de Riccardo IW4DXW







Il giorno Lun 21 Gen 2019, 13:20 jrusgrove@comcast.net <jrusgrove@comcast.net> ha scritto:
Riccardo
 
Corrected decode:
 
0300 Rank 0 car Eb/N0 2.3 Eb/N0 1.4 FBDECODE
 
Jay W1VD
 
 
 
----- Original Message -----
Sent: 1/21/2019 6:53:39 AM
Subject: Re: LF: EbNaut tonite
Stefan, Riccardo & EbNaut-eers
 
 
Stefan ... good copy throughout the night. Riccardo ... unfortunately only one decode to report. Markus noted a frequency error ... curious if propagation or NE0-M8T?
 
 
137545
 
2200 Rank 0 car Eb/N0 9.5 Eb/N0 9.2 RADIO GAGA
2300 -
0000 Rank 0 car Eb/N0 9.2 Eb/N0 9.3 RADIO GAGA
0100 Rank 0 car Eb/N0 6.0 Eb/N0 6.0 RADIO GAGA
0200 Rank 0 car Eb/N0 5.3 Eb/N0 5.9 RADIO GAGA
0300 Rank 0 car Eb/N0 6.1 Eb/N0 6.8 RADIO GAGA
0400 Rank 0 car Eb/N0 11.3 Eb/N0 10.4 RADIO GAGA
0500 Rank 0 car Eb/N0 3.7 Eb/N0 4.6 RADIO GAGA
0600 Rank 0 car Eb/N0 10.6 Eb/N0 10.2 RADIO GAGA
 
 
137547
 
0300 Rank 0 car Eb/N0 10.0 Eb/N0  FBDECODE
 
Jay W1VD
 
 
 
 
 
 
----- Original Message -----
Sent: 1/20/2019 12:48:34 PM
Subject: LF: EbNaut tonite
LF,

Tonite:

f = 137.545 kHz
Start time: 20.JAN.2019  22:00:00.3 UTC (hourly, including 6 UTC)
Symbol period: 1 s
Characters: 10
CRC bits: 12
Coding 16K21A
Antenna current: 4 A
Duration: 24:32 [mm:ss]


73, Stefan
--------------050500000903040609090908--