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 w0QLcGCL009482 for ; Fri, 26 Jan 2018 22:38:19 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1efBcc-0006YW-DT for rs_out_1@blacksheep.org; Fri, 26 Jan 2018 21:33:18 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1efBcb-0006YN-Pw for rsgb_lf_group@blacksheep.org; Fri, 26 Jan 2018 21:33:17 +0000 Received: from mout.gmx.net ([212.227.15.19]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1efBcY-0000ju-9q for rsgb_lf_group@blacksheep.org; Fri, 26 Jan 2018 21:33:16 +0000 Received: from [192.168.0.103] ([185.78.62.112]) by mail.gmx.com (mrgmx001 [212.227.17.190]) with ESMTPSA (Nemesis) id 0MD9q8-1eZguh0GKa-00GbQ4 for ; Fri, 26 Jan 2018 22:33:11 +0100 To: rsgb_lf_group@blacksheep.org References: <1371247928.20180126134524@gmail.com> <1397698645.2553258.1516983835152.JavaMail.open-xchange@oxbe7.tb.ukmail.iss.as9143.net> <686847880.20180126193617@gmail.com> From: Tobias DG3LV Message-ID: Date: Fri, 26 Jan 2018 22:33:04 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <686847880.20180126193617@gmail.com> X-Provags-ID: V03:K0:b2FzaLEsUv4QPTyKzEqunwDYgiJ8fIFH3ixT64xRcLU56Ae6j6L mkz/byY8JziMGznBhin0N88QfkYo6s85JpgBLhvbMgCtNA2t0yU5/w4o+46mm/FE5N0o7Qk NbPv5g5gIMtig5HJ746UioD58yunc0aLbDgbzMFqUMR7wAqpNifFlrLVUmw/3J2Y30RrhV3 aN3ahcKVpO62tlfPQqGYA== X-UI-Out-Filterresults: notjunk:1;V01:K0:Y3+jA9Pk/80=:4USz0DlTdZ3bHkwU65+mtN wwHfUSMdoB5YZ/deNRXykZg3vmzctMWpWZx9MgH8QsUIcSExyAMVvqHmwhyEYjrkhBHGod5df kCPqWLilpFxyQj5YEL0AhQk9YC9HissJw1pyCaN2C+8STncgFwo6xHRzMIQxD7lbnECOmmE/i VYzT5/uWe3g5w5OnzuqvrxD9hB7k19RF3Ov5y2xwhqCZ0P3exBgaqt1zkyOFCgT5LcmzdSHNg 2dmG8MdxnxpstH37GUcGV8CdxLrd15HcwLYLeBXq5GO5j4b6RTms1b+bOfcikezTPX1ZLQobW qKa7Czux077bRnyJQ5P39F7VBELiY4yElwXx3B1N4Ww5Ys9ObmeDkxxbYfUB8sgQ6Xmld0ZGN RSGLwQIlzcoOYvlxCgiY3Qej7rUYnewO9LcdY9gvePebcehU8c3YO+5gbE0oOOtGWuOnyogyu 5MQqZjqL/RcsuY17cWvqtO1Gg1pd888up3Rub6hMpEhvsvfQpT1iZjCipSRZk2WpNl0gofUE5 +QmqgKvdwlZz40mhvZ03r5C3HIV8NWBBbaamdqQLaF4sCppAtiSMTLo+YZ/bnl+N9M70BXcCU RxnjP1Axuj5q6p3Ur5aEkqZ8GjUILlwTbY0Dc4wtDVGJHdr49eySOMRX3P8m8OewmGiXoVUwR dvLKag2Us2eWvq96pxmXDlBVG5h8Zl5+mrITN8ow/R+I0idKQ3blhJoeB//9pKjQw5LkniYd1 eAG0QZdqHjmCPZGPYJfXrLM3fcWHkZyhke9Hd0lloaaOv1Ns2Pd6hNmySILCtlGOQ65ZhB2xP jYreWfySetuxzUx03Z5meT9uk8cELwHtQ1nUrhruoXdEh51UnY= 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 the administrator of that system for details. Content preview: Hi Chris ! The first screenshot shows an un-symmetrical square-wave that will generate two frequencies to the 1:4 divider and Tayloe-mixer. An FFT of this signal (R17-to-pin3) should show two peaks and not only one as expected. A standard frequency counter will show only the arithmetic mean value of both frequencies, as it is just adding zero-crossings during gate-time. [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dg3lv[at]gmx.net) X-Scan-Signature: e6de17d69e46ff4ea8db042ef2cd7e46 Subject: Re: Re: LF: Softrock RX divider IC problem, unexpected frequency out Content-Type: text/plain; charset=iso-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Hi Chris ! The first screenshot shows an un-symmetrical square-wave that will generate two frequencies to the 1:4 divider and Tayloe-mixer. An FFT of this signal (R17-to-pin3) should show two peaks and not only one as expected. A standard frequency counter will show only the arithmetic mean value of both frequencies, as it is just adding zero-crossings during gate-time. The Softrock series 6.x had a different type of I/Q divider that used three flips-flops. They did not have a problem with such an un-symmetrical square-wave, as there was an inherent divider by two, which forced the oscillator signal to be symmetrical to the mixer. You could try to move the bias-level of Q2 transistor to a voltage where the output (square-wave) signal of Q2 will be almost symmetrical. If the oscillator at Q1 is not running smoothly, this is where to look for variations of C's or R's to make it run stable. 73 de dg3lv Tobias Am 26.01.2018 um 20:36 schrieb Chris Wilson: > I just completed two scope measurements at R17 to pin 3 of the divider > IC. One of the faulty LF Softrock, and one on my MF one that works > fine. the resultant wave forms are quite different. But I am not > clever enough to say if they hold the clue, so will post them here. > Thanks again. > > Faulty LF oscillator or divider first > > http://www.gatesgarth.com/R17-to-pin3.jpg > > > Working MF Softrock, same place > > http://www.gatesgarth.com/mf-R17-to-pin3.jpg > > >