Return-Path: X-Spam-DCC: paranoid 1290; 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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD 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 tB6AdTqt026827 for ; Sun, 6 Dec 2015 11:39:29 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1a5WgH-00035C-Nu for rs_out_1@blacksheep.org; Sun, 06 Dec 2015 10:36:37 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1a5WgH-000353-EA for rsgb_lf_group@blacksheep.org; Sun, 06 Dec 2015 10:36:37 +0000 Received: from mout2.freenet.de ([195.4.92.92]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1a5WfI-0008Qc-4M for rsgb_lf_group@blacksheep.org; Sun, 06 Dec 2015 10:36:36 +0000 Received: from [195.4.92.142] (helo=mjail2.freenet.de) by mout2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.85 #1) id 1a5Wf2-00035h-DC for rsgb_lf_group@blacksheep.org; Sun, 06 Dec 2015 11:35:20 +0100 Received: from localhost ([::1]:60700 helo=mjail2.freenet.de) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.85 #1) id 1a5Wf2-0000tU-8O for rsgb_lf_group@blacksheep.org; Sun, 06 Dec 2015 11:35:20 +0100 Received: from mx17.freenet.de ([195.4.92.27]:50884) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.85 #1) id 1a5Wcw-0006hJ-LD for rsgb_lf_group@blacksheep.org; Sun, 06 Dec 2015 11:33:10 +0100 Received: from x4d025fa9.dyn.telefonica.de ([77.2.95.169]:56284 helo=[192.168.178.27]) by mx17.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1.2:DHE-RSA-AES128-SHA:128) (port 587) (Exim 4.85 #1) id 1a5Wcw-0004l5-HI for rsgb_lf_group@blacksheep.org; Sun, 06 Dec 2015 11:33:10 +0100 To: rsgb_lf_group@blacksheep.org From: =?UTF-8?Q?Wolfgang_B=c3=bcscher?= Message-ID: <56640EE5.7040803@freenet.de> Date: Sun, 6 Dec 2015 11:33:09 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 X-Originated-At: 77.2.95.169!56284 X-Scan-Signature: 4ead635eadbaebfaa92cfec77deb715d Subject: LF: EbNaut / Coherent PSK reception with SDR (-IQ) or similar radios Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5600 Greetings all, After trying a couple of modifications to my SDR-IQ, I found the following site .. http://g4hup.com/SDRlock.html .. which describes how to lock the 66.6667 MHz 'ADC clock' in the SDR-IQ to an external 10 MHz reference. Does anyone here have own experiences with this, or a similar circuit ? Dividing the 10 MHz reference by three, and subtracting that from 10 MHz multiplied by 7 sounds intriguing, but a multi-pole crystal ladder filter to 'clean up' the resulting 66.6666666 MHz signal is easier said than done (..lacking such crystals in the junk box). 73, Wolf DL4YHF .