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=-0.3 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_30_40,HTML_MESSAGE,RATWARE_GECKO_BUILD,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 u9NHDJJh006595 for ; Sun, 23 Oct 2016 19:13:20 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1byMHH-0000IT-EE for rs_out_1@blacksheep.org; Sun, 23 Oct 2016 18:09:43 +0100 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1byMHH-0000IK-43 for rsgb_lf_group@blacksheep.org; Sun, 23 Oct 2016 18:09:43 +0100 Received: from smtp2.hushmail.com ([65.39.178.134]) by relay2.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1byMHD-00069b-Pj for rsgb_lf_group@blacksheep.org; Sun, 23 Oct 2016 18:09:41 +0100 Received: from smtp2.hushmail.com (localhost [127.0.0.1]) by smtp2.hushmail.com (Postfix) with SMTP id E0C93A027A for ; Sun, 23 Oct 2016 17:09:35 +0000 (UTC) Received: from smtp.hushmail.com (w6.hushmail.com [65.39.178.92]) by smtp2.hushmail.com (Postfix) with ESMTP for ; Sun, 23 Oct 2016 17:09:35 +0000 (UTC) To: rsgb_lf_group@blacksheep.org References: <157b3bf43d2-111e-bfa3@webprd-a11.mail.aol.com> <0f1b59cf-e10d-1daf-125b-ad4aca471a06@gmail.com> <580205DC.80508@posteo.de> <58020BE2.1020107@posteo.de> <289454467.20161015210855@chriswilson.tv> <5808C23D.6060006@posteo.de> <580CE812.40500@posteo.de> <580CEA96.2010200@posteo.de> From: Tony Baldwin Message-ID: <4e343fa907bf9f2652ce9f25fe56d62a@smtp.hushmail.com> Date: Sun, 23 Oct 2016 18:09:31 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <580CEA96.2010200@posteo.de> X-Scan-Signature: 027eb28428a0ed4e20e06b28d08cfc7b Subject: Re: LF: Idiot's guide to receiving Ebnaut? - Tutorial part2 Content-Type: multipart/alternative; boundary="------------55AA8013BCD62C6200D575D7" 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 Content-Length: 4245 Status: O X-Status: X-Keywords: X-UID: 9156 This is a multi-part message in MIME format. --------------55AA8013BCD62C6200D575D7 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Hi Stefan My receiver is an Elad FDM-DUO SDR with a 10 MHz GPS input. Unfortunately SpecLab doesn't have that radio for an SDR input, so I have to use the sound input via USB. I could send the 1 PPS to my computer via RS 232 as well if that helps. 73, Tony, EI8JK. On 23/10/2016 17:51, DK7FC wrote: > Hi all, > > I started to write the second part of this tutorial but when finished > i was not happy with the result. > > The first thing one can say is that you will need a very frequency > stable receiver. There is no chance without an external reference > signal. For generating wav files using SpecLab you will also have to > use a ref signal to compensate the drift of your soundcard. Some > people have already prepared things in the past. You can use a 1 PPS > signal for soundcard drift compensation or a down divided 10 MHz GPS > reference or a stereo soundcard receiving VLF MSK signals on the other > channel to compensate the drift. > Also the SpecLab configuration depends on your receiver type. > Now i could simply make some assumptions what your equipment may be > but this may be not a good way. > So now i think it's better that we start with one example, one (or > more) of the stations who are interested in EbNaut decodes on LF > should describe the available system components. Then we can work it > out what must be done. > We will need to have a stable RX frequency and a drift compensated > soundcard frequency in the end. > > So who of those who are interested wants to start? > > 73, Stefan --------------55AA8013BCD62C6200D575D7 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 8bit Hi Stefan
 
My receiver is an Elad FDM-DUO SDR with a 10 MHz GPS input.
Unfortunately SpecLab doesn't have that radio for an SDR input, so I have to use the sound input via USB.
I could send the 1 PPS to my computer via RS 232 as well if that helps.

73, Tony, EI8JK.


On 23/10/2016 17:51, DK7FC wrote:
Hi all,

I started to write the second part of this tutorial but when finished i was not happy with the result.

The first thing one can say is that you will need a very frequency stable receiver. There is no chance without an external reference signal. For generating wav files using SpecLab you will also have to use a ref signal to compensate the drift of your soundcard. Some people have already prepared things in the past. You can use a 1 PPS signal for soundcard drift compensation or a down divided 10 MHz GPS reference or a stereo soundcard receiving VLF MSK signals on the other channel to compensate the drift.
Also the SpecLab configuration depends on your receiver type.
Now i could simply make some assumptions what your equipment may be but this may be not a good way.
So now i think it's better that we start with one example, one (or more) of the stations who are interested in EbNaut decodes on LF should describe the available system components. Then we can work it out what must be done.
We will need to have a stable RX frequency and a drift compensated soundcard frequency in the end.

So who of those who are interested wants to start?

73, Stefan

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