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 wBJ0XYKf006901 for ; Wed, 19 Dec 2018 01:33:40 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gZPhn-00047R-Vy for rs_out_1@blacksheep.org; Wed, 19 Dec 2018 00:27:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gZPhC-00047I-BS for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 00:26:42 +0000 Received: from sonic301-2.consmr.mail.bf2.yahoo.com ([74.6.129.41]) by relay1.thorcom.net with esmtp (Exim 4.91_59-0488984) (envelope-from ) id 1gZPh8-0004Ag-Mp for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 00:26:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aol.com; s=a2048; t=1545179192; bh=kGTopBGSZP8croCxdfqHdoSJGe6p5BuDCaqEhB90Q44=; h=Date:From:To:Subject:References:From:Subject; b=K59m66uVkeDMsmO4YgGFfiaHyuRXC2f9V0GQ+3QVY+NliCxsjetRydJAclxu4nGRa1Z9xR1TOMgzG3qUOlwwtGyUsflB/OclutXtZl2CcVlJmf/yO93IAfHdx0bAaDVw+ApjQkTGRabvfK5OxiBCflgoQojeCda8koBwqs31bDGxZX5I6j/YeirFuJSwlVjWMSUnMdhE1JL5Bj3YJEOTII5CRgkrQ59nRKMCGmQEBASsB4jYjXCKyPczi1tljNKspQGJ0L8cEJ5+GgqTDZqmt8ZfXtlDjUOfYFlxphdswgg04SGUfA9gVtnnH2IbnoN046BG2pQMIqTXGJqQF6yAAQ== X-YMail-OSG: IgYeBb4VM1l83bxGI3ikX03eoVlAz23srtWe9aqAOw8beroklClrHodpWIc9u4l KaFFhz_x_2xKmrnfjDFUMnd5i.fzy54bWxppCTKtg._pdzLfj10JLK9F8MdHWENq..pPMymtSzwz UR_foHlvTXOjbrZOLfNdV0amJcC2PsMeX73mXutrJlq9mLUIseTarR2nWb5d5r6eZf_fH.NWhDes J5omSbQmHt6TYmo_BTNXptQJ9cWYVRuGzljFdIlwfKBwR55MnRm7Gwmi_bXCJzLaNpWE_u8M6H0B 9ADyOECc0YL5r3HePwEMyn7k1vlYP9pO2TzStKqE2_MceeUPypa_Mm4CSYs8jsafSRuTmCfKorXm bAxiN8nwVUQzSYxs0ilUV_gfvGNeZKaroRnchqKmPlDI449sX0xpi36kcuwWM60aTYMZQX9eC6L0 NmnO1FeadRxCut1dU72f7Ophd63Wfno3cIgItceoQkiBCzn2bCsygcspgo28lqg_uZG0zuNqk8bO bpusLYKh8dhv6H3Vz5qWnXwyM0N_EBy5km0gxLy6F5jikHYC0vFRpRLFRbGXqrB8TE08GGH7wBFK CLitX9eaxl9wN4F.pgH5vU4G9zcuXl4JfiYiElbJHferHS7f_vuh1NJDQS5j76BfDwPu5Pv5kIaH bazhECFtmIQOJPdVqA7XbExp7qyB33nfRfJaJFDC6EGKRvJINdNSdXMz9d2zF.M12h8Z_XJreDrf 4dj3hPZnbByRdl_JP_U.M7p8bTcJlQReZvIOw_bIBobFIcGn693uZrCfVF6VcG2.nhdUn0s8xiR. as5AVw8Apem.28.duiclhvrVssV4P.MNr3edUszBXvLg36h.CxSqGzZ10guG9wmADkIWFNF3UaeA C95qbjtLD.SMAJwx1umzN0FQ6WbyOTOnU48k2XPLFzqfQaM6I7rhqKEMSnchtO.1lBAiiHy6GFug yxy9qi4UoBj_CqdFbB6Xoe0QP4LWbbozZYyvFpN1.LDEA1eKq5.CYwSD_kSFjPYIRkY1O_XiLzv9 SgKQ1GDxULZWvd1M- Received: from sonic.gate.mail.ne1.yahoo.com by sonic301.consmr.mail.bf2.yahoo.com with HTTP; Wed, 19 Dec 2018 00:26:32 +0000 Date: Wed, 19 Dec 2018 00:26:29 +0000 (UTC) From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-ID: <746980469.6451777.1545179189867@mail.yahoo.com> MIME-Version: 1.0 References: <746980469.6451777.1545179189867.ref@mail.yahoo.com> X-Mailer: WebService/1.1.12857 aolwebmail Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; Touch; rv:11.0) like Gecko X-Spam-Score: 1.0 (+) 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 @@CONTACT_ADDRESS@@ for details. Content preview: Hi Chris, Kiwi-SDR: Last year I asked the same question to John Seamons, and he explained that the GPS frequency correction is done in software, and won't actually lock the LO phase to GPS. RSP2: It seems possible to replace the TXCO by an external 24 MHz reference. But the difficulty with the digital output is that you need to be sure that buffer over/underruns never occur in the subs [...] Content analysis details: (1.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [74.6.129.41 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid 1.0 FREEMAIL_REPLY From and body contain different freemails X-Scan-Signature: ead411ce91f9601ce3974c7575797436 Subject: Re: LF: Ebnaut receiver frequency stability qustion Content-Type: multipart/alternative; boundary="----=_Part_6451776_15726345.1545179189865" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: *** X-Spam-Status: No, hits=3.2 required=5.0 tests=FORGED_MUA_MOZILLA,HTML_20_30, HTML_MESSAGE 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_6451776_15726345.1545179189865 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Chris, Kiwi-SDR: Last year I asked the same=C2=A0question to=C2=A0John Seamons, an= d he explained=C2=A0that the GPS frequency correction is=C2=A0done in softw= are, and=C2=A0won't=C2=A0actually lock the LO phase=C2=A0to GPS. RSP2:=C2=A0It seems possible to replace the TXCO by an external 24 MHz refe= rence. But the difficulty with the digital output is that you need to be su= re that=C2=A0buffer over/underruns never occur in the subsequent audio proc= essing.=C2=A0With an=C2=A0analog receiver, SpecLab can correct=C2=A0glitche= s when you=C2=A0feed a 1pps time reference to the=C2=A0other soundcard=C2= =A0channel. Unfortunately you can't do that with an all-digital audio path. 73, Markus -----Urspr=C3=BCngliche Mitteilung----- Von: Chris Wilson An: rsgb_lf_group@blacksheep.org ; rsgb-lf-gr= oup@groups.io ; Discussion of the Lowfer (US, Euro= pean, & UK) and MedFer bands Verschickt: Di, 18. Dez 2018 23:54 Betreff: LF: Ebnaut receiver frequency stability qustion Hello=C2=A0 Ebnauters Would a KiwiSDR (which I do not own but was thinking of buying) have adequate LF frequency stability for Ebnaut reception given it uses 1PPS from a GPS receiver to stabilize the frequency? Or do I need a receiver with a true GPS trained reference input? I see only one cheaper price end RX with such a port, the SDRPlay RSP2, but that expects a 24 MHz reference input rather than the common 10 MHz. I have a Trimble Thunderbolt for a 10 MHz reference, but nothing that could give 24 MHz. What commercial SDR's could I look to for suitable stability please, that are good on LF and below, and a reasonable cost? Thanks 2E0ILY --=20 Best regards, Chris=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0= =C2=A0 =C2=A0 =C2=A0 mailto:dead.fets@gmail.com ------=_Part_6451776_15726345.1545179189865 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Chris,

Kiwi-SDR: Last year I asked= the same question to John Seamons, and he explained that th= e GPS frequency correction is done in software, and won't ac= tually lock the LO phase to GPS.

RSP2: It seems possible t= o replace the TXCO by an external 24 MHz reference. But the difficulty with= the digital output is that you need to be sure that buffer over/under= runs never occur in the subsequent audio processing. With an anal= og receiver, SpecLab can correct glitches when you feed a 1pps ti= me reference to the other soundcard channel. Unfortunately you ca= n't do that with an all-digital audio path.

73, Markus

-----Urspr=C3=BCngliche Mitteilung-----
Von: Chris Wil= son <dead.fets@gmail.com>
An: rsgb_lf_group@blacksheep= .org <rsgb_lf_group@blacksheep.org>; rsgb-lf-group@groups.io <rsgb= -lf-group@groups.io>; Discussion of the Lowfer (US, European, & UK) = and MedFer bands <lowfer@mailman.qth.net>
Verschickt: = Di, 18. Dez 2018 23:54
Betreff: LF: Ebnaut receiver frequenc= y stability qustion



Hello  Ebnauters
=

Would a KiwiSDR (which I do not own but was thinking of buying)= have
adequate LF freque= ncy stability for Ebnaut reception given it uses
1PPS from a GPS receiver to stabilize the frequenc= y? Or do I need a
receiv= er with a true GPS trained reference input? I see only one
<= /div>
cheaper price end RX with such a port, t= he SDRPlay RSP2, but that
expects a 24 MHz reference input rather than the common 10 MHz. I
have a Trimble Thunderbolt for= a 10 MHz reference, but nothing that
could give 24 MHz.

What commercia= l SDR's could I look to for suitable stability please,
that are good on LF and below, and a reasona= ble cost? Thanks 2E0ILY
<= br abp=3D"345">
--
=
Best regards,
Chris              &n= bsp;           mailto:dead.fets@gmail.com


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