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 vBNEnf1I012918 for ; Sat, 23 Dec 2017 15:49:44 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1eSl3X-0007IH-AE for rs_out_1@blacksheep.org; Sat, 23 Dec 2017 14:45:43 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1eSl3X-0007I8-0e for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2017 14:45:43 +0000 Received: from porthos.netcom.co.uk ([217.72.171.73]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1eSl3T-0001XJ-P0 for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2017 14:45:41 +0000 X-DKIM-Result: Domain=abelian.org Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=abelian.org ; s=default; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:References:Reply-To:To:From:Subject:Sender:Cc: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=i5hX2S/jy12bmey15tGstXX+Rb7ZkIC1mqCnwSLbe9k=; b=Sin2q91ffOcFoJAIuqZ9Ek5a/7 rJr0eVvpqo6XX9pteS63vTwN8LQlM/jJnxansFX0HHdwI+aSD1g1d5VahehE10gCx/tbqR4cNjUB+ KtZ4QqGc7tf/yqW0xdMD6I4aKN1BNhWhdTu3i7YNoTegxubhOr/+THkoM52pLB2clBqM=; Received: from i-194-106-52-83.freedom2surf.net ([194.106.52.83]:42850 helo=pn.abelian.org) by porthos.netcom.co.uk with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1eSl3T-0005Bx-GU for rsgb_lf_group@blacksheep.org; Sat, 23 Dec 2017 14:45:39 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by pn.abelian.org (Postfix) with ESMTP id D8E46400069 for ; Sat, 23 Dec 2017 14:45:38 +0000 (UTC) From: Paul Nicholson To: rsgb_lf_group@blacksheep.org References: <4d96a9d4-5f22-7650-872b-6344e9aea8e3@abelian.org> <5A20A4EC.4060009@posteo.de> <5A2694B9.4050407@posteo.de> <21caec0e-1514-3294-89a3-8569f0c6d443@abelian.org> <27BE047B-55C1-45E1-9BD8-575D5EF7179C@hurontel.on.ca> <4c4d7934-b02f-0c9f-e251-4c5a07086bef@abelian.org> <526a4012-19d5-aff0-0745-4b02a3a134e8@abelian.org> <5A2FD635.8080503@posteo.de> <807b7164-c345-9650-0c6b-d813b3304483@abelian.org> <0374401c-a9a5-ba61-89e0-15d5ad016ac8@abelian.org> <36a938b7-9db4-7417-26d6-5b4c4eac900e@abelian.org> <5A35A023.5010707@posteo.de> <1f5204c1-f256-f26e-e6dd-a4edc0c8a443@abelian.org> <579355A36AEE9D4FA555C45D556003AB9AABBD7A@servigilant.vigilant.local> <5086126d-5770-653c-6cf0-fd8b1a4a860c@abelian.org> Message-ID: <3428fb07-6b88-4b82-8e8d-ea7d9ea07a47@abelian.org> Date: Sat, 23 Dec 2017 14:45:38 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <5086126d-5770-653c-6cf0-fd8b1a4a860c@abelian.org> Content-Language: en-US X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - porthos.netcom.co.uk X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - abelian.org X-Get-Message-Sender-Via: porthos.netcom.co.uk: authenticated_id: catchall@abelian.org X-Authenticated-Sender: porthos.netcom.co.uk: catchall@abelian.org 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: Some amplitude calibration runs on the H rx yesterday around midday. At the same time measured the cross-talk between the two channels. At 8030 Hz: N/S to E/W -58.7 dB E/W to N/S -44.2 dB which is a great improvement on the previous rx, which was no better than -30 dB. This is through ensuring that the impedance from each leg of each balanced pair to ground are well matched - at both ends of the downlink cable. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 046f068074e745d5c60ca47deee9b503 Subject: Re: LF: RE: Todmorden receiver Content-Type: text/plain; charset=utf-8; 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=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS 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 Some amplitude calibration runs on the H rx yesterday around midday. At the same time measured the cross-talk between the two channels. At 8030 Hz: N/S to E/W -58.7 dB E/W to N/S -44.2 dB which is a great improvement on the previous rx, which was no better than -30 dB. This is through ensuring that the impedance from each leg of each balanced pair to ground are well matched - at both ends of the downlink cable. About to run E rx amplitude cal, I'll try to get that done before Stefan's EbNaut starts at 15:30. First indications are that the noise is still high on the H rx: S/Ns are often lower than the E field. 48V supply parts arrived the other day and work well. No starting problems even with 60 ohms series resistance using one of these https://uk.rs-online.com/web/p/embedded-switch-mode-power-supplies-smps/1065848/ and https://uk.rs-online.com/web/p/isolated-dc-dc-converters/1227019/ That PSU is adjustable up to 55V which is useful. So in the next couple of days, both rxs will come indoors for a PSU upgrade. -- Paul Nicholson --