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 x0P0239B026506 for ; Fri, 25 Jan 2019 01:02:05 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gmooy-0004xP-GL for rs_out_1@blacksheep.org; Thu, 24 Jan 2019 23:54:08 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gmomd-0004x5-2f for rsgb_lf_group@blacksheep.org; Thu, 24 Jan 2019 23:51:43 +0000 Received: from sonic313-14.consmr.mail.bf2.yahoo.com ([74.6.133.124]) by relay1.thorcom.net with esmtp (Exim 4.91) (envelope-from ) id 1gmomY-0007yh-Hz for rsgb_lf_group@blacksheep.org; Thu, 24 Jan 2019 23:51:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=aol.com; s=a2048; t=1548373894; bh=itLcOaT2d58wYC/SL6yw/H97wKPCX48/lWijxlSsFSg=; h=Date:From:To:Subject:References:From:Subject; b=uFWxvQUFPEHhPdDanY69HcWEco/DS3S5omK4bLdK47nmUAwo+WcWFdV/ILvFvZtOxSFPpeYcyogrSzDhDbPuH+K7sxzPHJkprCmZWUe92mhRQTq/vLBx7phH2YsFrQ8Cdh+Sc0FV2mosrmrADXJEhc1hPPxeV9akYQEjsmKaSuVj34yOfEGsUYAoVpLDnUc2R+NxbhWkpz6Hk8K+jLRI+udmj1Bh3OLHkxPGxucwaNik1brQe8EW9WvVaUpy0Vm7JDKTq0/2mluZ5eCw1ltgrZSRA7GQaIDFCSAg40E+huFxrqWcJdZU/AW9rO57vsO1FPWhW/9XmXKla2++gxAFZQ== X-YMail-OSG: ZkBT74YVM1mfrxcENClUIYi0jHIQdn1Lerz6CHffNlKC.OI6Xt.N7KDpqKeu_Bg KPK0ZMTBTzHMNe0BnTqiyboDyvVDACwiQALVle5ANi3rD1XLjCeYq_tKbRncEPm10txt6c7DAJh9 S4HvMyg.K6EI0EbPvqxvpvyogVxDQgdxkSayw3YwXGsaqPIvJr6XP6ZBBy5ShGDQF.zJ1WkmsSt5 D5cdRgl9WLGGStkpeF1XHws0Xih2cTQ6K02SKt3KKh1kzsQXw1i9is.43rJP.MIEUmp_v9zrypg1 rK802b5WVBcdXIURQlkTQ1._btSS4dlPcViTOO1Ia8BxRyOXh9s3cofOeNK4sa6rpEkdG7aROXRd l94p9x.E4h7RB8I_aqxtsiZzgOkwlOR1KgTjutz9PI3llmd2PdZq_MXeRN.tZluEIFAzXla7xy3_ hclAyEDDw1tdFZiwk_Tz1Znj7lyCRE2LGPe5CI1uwZfxdpMCYDQmKOodvhoVJUpO6KHFbxP_Th_k PRn4AHuCZL9M.cM5l3Wuzg8YhtddAbO1ejeY0gBlqlAow20FoNhdboWQHHYlPVJJvCFSSnvR_HSV .yUabxzPgpXgLXWC4x9.lhNKRChzbyqFIqY7y0uJkLb_stx8PL6fhtz1fDyvc1_SdYdLaAOwUElv JOdf3XUh8WKv8p1d0jHzvleAfKoksPRUbeu1B7OdTi1JbBnpQrZvfBwdKenpZ7iPyLRAt1cHFW9b zWLeFmrbOsLVDmeh2AysSi_1mgEG4tn33AU9qB6x3ZC2.OEvc7F2t08vgRcntTt4_0kv_RS0Iojj LBVudLgK7x_bZjuV9URdEOPGBqguzXcFvwtLjJG50_W8W3Y0CgzDGOIeZ_cA7txDNykXKWlmjkAZ j.k9GE1y.VtatcQgjfVkKJq7yubUhhinxfmha3k_U7CXNESN86Umm1hFJApIUfyYNjYjkBYdk6ap mVTsYCOuYthqSyS83xJpAXTSIhO3Z5Qyfzc16k5z3b2NzIjhq3NFNKxCZO5UUffPu7LSc6OmEbAD x.7SnNlj.4y5iBO6K Received: from sonic.gate.mail.ne1.yahoo.com by sonic313.consmr.mail.bf2.yahoo.com with HTTP; Thu, 24 Jan 2019 23:51:34 +0000 Date: Thu, 24 Jan 2019 23:51:32 +0000 (UTC) From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-ID: <491430418.693512.1548373892754@mail.yahoo.com> MIME-Version: 1.0 References: <491430418.693512.1548373892754.ref@mail.yahoo.com> X-Mailer: WebService/1.1.13027 aolwebmail Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; Touch; rv:11.0) like Gecko 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 @@CONTACT_ADDRESS@@ for details. Content preview: Hi Ric, Good idea! You can check the effect on my grabber: I've injected an auxiliary carrier into the right channel of the topmost speclab instance, so the colour on your frequency indicates phase instead o [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [74.6.133.124 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 X-Scan-Signature: ebba021850e0a5d4120636e52401e975 Subject: Re: LF: NEO-M8T and H-mixer (SDR) Content-Type: multipart/alternative; boundary="----=_Part_693511_1509326376.1548373892753" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: **** X-Spam-Status: No, hits=4.6 required=5.0 tests=FORGED_MUA_MOZILLA,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 ------=_Part_693511_1509326376.1548373892753 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Ric, Good idea! You can check the effect on my grabber: I've injected an auxilia= ry carrier into the right channel of the topmost speclab instance, so=C2=A0= the colour on your frequency indicates phase instead of azimuth.=C2=A0If yo= u like=C2=A0you could=C2=A0temporarily interrupt the=C2=A0carrier and verif= y that it comes back with same phase. Autodecoders are looking out=C2=A0for you and Joe, like last night. Best 73, Markus =C2=A0 -----Urspr=C3=BCngliche Mitteilung----- Von: Riccardo Zoli An: LF Group Verschickt: Do, 24. Jan. 2019 23:56 Betreff: LF: NEO-M8T and H-mixer (SDR) LF, I'm testing a useful trick to allow a quadrature generator to mantain a sta= ble and nominal phase using a GPS module NEO/LEA-M8T.Normally, an IC 74HC74= is used to generate the quadrature LO signals for a H-mixer (typically in = a SDR "Softrock style").Clocking the IC with TP2 signal (f * 4, so 544 kHz = to obtain a 136 kHz frequency conversion), there is a 90 deg. step phase am= biguity. Furthermore, with an undesiderate glitch on the reference clock si= gnal, the phase could wrongly rotate.So: resetting (clear) the two D flip-f= lops of the 74HC74 on rising edge of the 1PPS pulse,=C2=A0already reference= for PC audio-card, we can keep nominal phasing which is restored every sec= ond. All the best 73 de Riccardo IW4DXW ------=_Part_693511_1509326376.1548373892753 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Ric,

Good idea! You can check the = effect on my grabber: I've injected an auxiliary carrier into the right cha= nnel of the topmost speclab instance, so the colour on your frequency = indicates phase instead of azimuth. If you like you could te= mporarily interrupt the carrier and verify that it comes back with sam= e phase.

Autodecoders are looking out for you and Joe, like las= t night.

Best 73,
Markus

 


-----Urspr=C3=BCngliche Mitteilung-----
Von: Riccardo Zoli <riccardozoli80@gmail.com>
An: LF = Group <rsgb_lf_group@blacksheep.org>
Verschickt: Do, 2= 4. Jan. 2019 23:56
Betreff: LF: NEO-M8T and H-mixer (SDR)

LF,<= /div>

I'm testing a = useful trick to allow a quadrature generator to mantain a stable and nomina= l phase using a GPS module NEO/LEA-M8T.
Normally, an = IC 74HC74 is used to generate the quadrature LO signals for a H-mixer (typi= cally in a SDR "Softrock style").
Clocking the IC wit= h TP2 signal (f * 4, so 544 kHz to obtain a 136 kHz frequency conversion), = there is a 90 deg. step phase ambiguity. Furthermore, with an undesiderate = glitch on the reference clock signal, the phase could wrongly rotate.
=
So: resetting (clear) the two D flip-flops of the 74HC74 o= n rising edge of the 1PPS pulse, already reference for PC audio-card, we can keep nominal ph= asing which is restored every second.


All the best


73= de Riccardo IW4DXW



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