Return-Path: X-Spam-DCC: paranoid 1480; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u8SHG4rC005261 for ; Wed, 28 Sep 2016 19:16:05 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bpINz-0000Qt-3a for rs_out_1@blacksheep.org; Wed, 28 Sep 2016 18:11:11 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bpINy-0000Qk-4x for rsgb_lf_group@blacksheep.org; Wed, 28 Sep 2016 18:11:10 +0100 Received: from smtp10.smtpout.orange.fr ([80.12.242.132] helo=smtp.smtpout.orange.fr) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1bpINw-0002pa-Du for rsgb_lf_group@blacksheep.org; Wed, 28 Sep 2016 18:11:09 +0100 Received: from [10.199.124.57] ([10.163.22.94]) by mwinf5d45 with ME id p5B21t00h21o3qa035B32G; Wed, 28 Sep 2016 19:11:06 +0200 X-ME-Helo: [10.199.124.57] X-ME-Date: Wed, 28 Sep 2016 19:11:06 +0200 X-ME-IP: 10.163.22.94 Date: Wed, 28 Sep 2016 19:10:58 +0200 From: Michel Brunel X-Priority: 3 (Normal) Message-ID: <1544518546.20160928191058@mterrier.net> To: Domenico IZ7SLZ In-Reply-To: References: <1576890eb5c-1d99-6fb7@webprd-a102.mail.aol.com> <1576897e3c5-1d99-7020@webprd-a102.mail.aol.com> MIME-Version: 1.0 X-Scan-Signature: 29f1b43ee9e13e220716185d38bfb88c Subject: Re: LF: F5WK EbNaut Content-Type: multipart/alternative; boundary="----------02B1F01930FCEBD64" 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 X-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8868 ------------02B1F01930FCEBD64 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi, Big thanks to Domenico, Markus and Stefan for their successful decoding of = my EbNaut transmissions. Ebnaut decoding is not an easy task especially with weak signal. I fear my GPSDO frequency was not as accurate than expected. I had the bad = idea to use a low cost GPS antenna wich performed not as good as the professional grade antenna I used for tests at home. Thu= s some jitter and phase jumps depending on GPS constellation position. As a "proof of concept" I made Loran-C records during the day using the eb= naut setup and results are sometime good sometime not so good. The transmitter overcurrent was randomly triggered by the phase reversal. = Bpsk modulation is performed synchronously by exclusive OR gates, between t= he D flip-flop and the MOS drivers. Phase reversal is like changing the fre= quency for a very short time, which leads to a current pike due to the high= Q of the LF antenna. Decision was taken to bypass the overcurrent detectio= n. The good way to do bpsk modulation is with a suitable DDS such as AD9852.= =20 I found the antenna performs poorly at LF since the radials are burried in = a sandy soil, as time goes on. No big deal for ebnaut though. A lot of things to improve for my next LF campaign,=20 73, Michel - f5wk/P=20 Le mercredi 28 septembre 2016 =C3=A0 11:08:55, Domenico =C3=A9crivait : Hello LF, EbNaut test signals from Michel F5WK/P in Normandy has been received also = here in JN80NU (QRB =3D 1700 km). This is the list of my decodes: DATE TIME UT Time OFFSET [s] EbN0[dB] Carrier E= bN0[dB] Rk 26-09-2016 21:30 0 0.9 = 1.9 0 =20 message:F5WK JN18HP ---------------------------------------------------------------------------= --------------------------------------------------- 27-09-2016 18:30 1 5.6 = 6.7 0 =20 27-09-2016 19:00 1 7.8 = 9.0 0 =20 27-09-2016 19:30 1 5.1 = 5.8 0 =20 27-09-2016 20:00 1 6.1 = 6.7 0 =20 27-09-2016 20:30 1 6.5 = 6.7 0 =20 27-09-2016 21:00 1 NIL 27-09-2016 21:30 1 3.7 = 4.6 0 =20 27-09-2016 22:00 1 3.0 = 4.4 0 =20 message: F5WK IN99EF receiver in use: JRC NCR-92M with 10 MHz GPDO with 7m passive whip antenna. Congratulation Michel for your EbNaut nice going; can you describe your set= up ? 73, Domenico IZ7SLZ On 27 September 2016 at 00:22, Markus Vester wrote: Michel F5WK is running EbNaut tonight! He's got a strong and stable Signal,= and the 21 UT sequence produced a successful decode here. Thanks to Michel for the test transmissions, and to Domenico IZ7SLZ for kin= dly passing on the Information. Best 73, Markus (DF6NM) ---------- Forwarded message ---------- From: "Michel Brunel" Date: 26 Sep 2016 18:41 Subject: Re: Need some help ! To: "Domenico IZ7SLZ" Cc:=20 Hi Domenico, I'm now ready to transmit an ebnaut test at UTC 18:00:00 - 137489.999179 Hz - message length 11 - Coding 8K19A - symbol period 1.0 - duration 13:20:00 Estimated ERP: 100 mW=20 Michel - f5wk/P -- ------------02B1F01930FCEBD64 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Re: LF: F5WK EbNaut Hi,

Big thanks to Domenico, Markus and Stefan for their successful decoding of = my EbNaut transmissions.
Ebnaut decoding is not an easy task especially with weak signal.

I fear my GPSDO frequency was not as accurate than expected. I had the bad = idea to use a low cost GPS antenna wich performed
not as good as the professional grade antenna I used for tests at home. Thu= s some jitter and phase jumps depending on GPS constellation position.
As a "proof of concept" I made Loran-C records during the day  using t= he ebnaut setup and results are sometime  good sometime not so good.
The transmitter overcurrent was randomly  triggered by the phase rever= sal. Bpsk modulation is performed synchronously by exclusive OR gates, betw= een the D flip-flop and the MOS drivers. Phase reversal is like changing th= e frequency for a very short time, which leads to a current pike due to the= high Q of the LF antenna. Decision was taken to bypass the overcurrent det= ection.
The good way to do bpsk modulation is with a suitable DDS such as AD9852.&n= bsp;

I found the antenna performs poorly at LF since the radials are burried in = a sandy soil, as time goes on. No big deal for ebnaut though.

A lot of things to improve for my next LF campaign, 

73,
Michel - f5wk/P 



Le mercredi 28 septembre 2016 =C3=A0 11:08:55, Domenico =C3=A9crivait :


 Hello LF,

EbNaut test signals from Michel F5WK/P in Normandy  has been received = also here in JN80NU (QRB =3D 1700 km).
This is the list of my decodes:

DATE           TIME UT     Time OFFSE= T [s]       EbN0[dB]         Carrier EbN= 0[dB]     Rk
26-09-2016     21:30            = ; 0                     &= nbsp;       0.9             &n= bsp;          1.9         &nbs= p;       0     
 message:F5WK JN18HP
-----------------------------------------------------------------------= -------------------------------------------------------
27-09-2016     18:30             1 =                      = ;      5.6               =           6.7           &= nbsp;     0  
27-09-2016     19:00             1 =                      = ;      7.8               =           9.0           &= nbsp;     0     
27-09-2016     19:30             1 =                      = ;      5.1               =           5.8           &= nbsp;     0  
27-09-2016     20:00             1 =                      = ;      6.1               =           6.7           &= nbsp;     0  
27-09-2016     20:30             1 =                      = ;      6.5               =           6.7           &= nbsp;     0  
27-09-2016     21:00             1 =                      = ;     NIL
27-09-2016     21:30             1 =                      = ;      3.7               =           4.6           &= nbsp;     0  
27-09-2016     22:00             1 =                      = ;      3.0               =           4.4           &= nbsp;     0  
 message: F5WK IN99EF

receiver in use: JRC NCR-92M with 10 MHz GPDO with 7m passive whip ante= nna.

Congratulation Michel for your EbNaut nice going; can you describe your= setup ?
73, Domenico IZ7SLZ





On 27 September 2016 at 00:22, Markus Vester <mar= kusvester@aol.com> wrote:
Michel F5WK is runni= ng EbNaut tonight! He's got a strong and stable Signal, and the 21 UT seque= nce produced a successful decode here.

Thanks to Michel for the test transmissions, and to Domenico IZ7SLZ for kin= dly passing on the Information.

Best 73,
Markus (DF6NM)

---------- Forwarded message ----------
From: "Michel Brunel" <f5wk@mterrier.net>
Date: 26 Sep 2016 18:41
Subject: Re: Need some help !
To: "Domenico IZ7SLZ" <iz7slz.domenico@gmail.c= om>
Cc: 

Hi  Domenico,

I'm now ready to transmit an ebnaut test at UTC 18:00:00
- 137489.999179 Hz
- message length 11
- Coding  8K19A
- symbol period 1.0
- duration  13:20:00

Estimated ERP: 100 mW 

Michel - f5wk/P




--  ------------02B1F01930FCEBD64--