Return-Path: X-Spam-DCC: paranoid 1356; 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=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,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 t436NJFB022104 for ; Sun, 3 May 2015 08:23:19 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YonCc-0008Jd-Ja for rs_out_1@blacksheep.org; Sun, 03 May 2015 07:16:34 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YonCc-0008JU-Bl for rsgb_lf_group@blacksheep.org; Sun, 03 May 2015 07:16:34 +0100 Received: from parrot.netcom.co.uk ([217.72.171.49]) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1YonCa-0006lT-R8 for rsgb_lf_group@blacksheep.org; Sun, 03 May 2015 07:16:33 +0100 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by parrot.netcom.co.uk (Postfix) with ESMTP id 7850A3273D6 for ; Sun, 3 May 2015 07:12:22 +0100 (BST) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id B5C8228A05CA for ; Sun, 3 May 2015 06:16:31 +0000 (UTC) Message-ID: <5545BD3F.7050007@abelian.org> Date: Sun, 03 May 2015 06:16:31 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <39057AB697834433BAF97C1532272E0E@White> In-Reply-To: <39057AB697834433BAF97C1532272E0E@White> X-Scan-Signature: 87966b345956c8ef3389b993f6a18f4e Subject: Re: LF: Re: Re: 8270Hz - on air Content-Type: text/plain; charset=ISO-8859-1; 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: 3045 Markus wrote: > somewhat patchy on Paul's steerable VLF-spectrogram. Yes, there is something wrong with the phase. The problem is at my end - looks like a software change to the receive timing about a week ago has produced a problem. There is, intermittently, a lot of spiky phase noise. It is a delicate compromise between responding quickly to A/D clock drift and maintaining a low phase noise. Today I will fix it, if necessary I'll revert to an earlier version. Your signal is somewhere between 0.05 and 0.10 fT and that should have produced a quite solid trace on the spectrogram. -- Paul Nicholson --