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 w1PD26Ml030701 for ; Sun, 25 Feb 2018 14:02:07 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1epvkL-00083K-7e for rs_out_1@blacksheep.org; Sun, 25 Feb 2018 12:49:41 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1epvkK-00083B-7b for rsgb_lf_group@blacksheep.org; Sun, 25 Feb 2018 12:49:40 +0000 Received: from omr-m017e.mx.aol.com ([204.29.186.19]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1epvkG-00085e-3s for rsgb_lf_group@blacksheep.org; Sun, 25 Feb 2018 12:49:38 +0000 Received: from mtaout-mab01.mx.aol.com (mtaout-mab01.mx.aol.com [172.26.249.81]) by omr-m017e.mx.aol.com (Outbound Mail Relay) with ESMTP id B977038000AA for ; Sun, 25 Feb 2018 07:49:32 -0500 (EST) Received: from [192.168.1.2] (0x5b3139322e3136382e312e325d [71.184.20.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mtaout-mab01.mx.aol.com (MUA/Third Party Client Interface) with ESMTPSA id 7A37F38000088 for ; Sun, 25 Feb 2018 07:49:32 -0500 (EST) To: rsgb_lf_group@blacksheep.org References: <52dea779-7aae-aff8-1072-ad24cdcd007c@freenet.de> <4024a3ab-eb61-7801-e9ad-5715c5f49546@abelian.org> <9a7cf91a-5643-9149-28a7-ce6d282db3e9@abelian.org> <1555f07a-f2a3-fb55-c246-f52442a1a723@freenet.de> <4ac6d43f-85c7-bd05-85b9-5b64ebcfbf35@abelian.org> <2f6a408a-af27-9c9b-b116-7becd9b1c66f@abelian.org> <6eced61e-a7ce-2935-195d-4a76f375b11e@freenet.de> <633c1982-97fe-7d9d-7f69-07e3503147bb@abelian.org> <5A88244B.1020304@posteo.de> <1b3df450-bb19-b667-b784-17c8b48917db@abelian.org> <5A889F44.5070205@posteo.de> <358b9220-66f7-39dc-3f92-60fa62a623ee@abelian.org> From: "Stan, W1LE" Message-ID: <4640db50-2fd8-5dcb-edf1-bf91c247813f@verizon.net> Date: Sun, 25 Feb 2018 07:49:19 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <358b9220-66f7-39dc-3f92-60fa62a623ee@abelian.org> Content-Language: en-US x-aol-global-disposition: G x-aol-sid: 3039ac1af9515a92b0dc728e X-AOL-IP: 71.184.20.195 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: Hello Paul,  Can multiple 2 channel audioInjectors be stacked up on the Raspberry Pi, to get 4 channels ? Can a single 2 channel audioinjector be used with a USB 2 channel audio card, for 4 channels ? [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- X-Scan-Signature: 33d261536bb1467bb13d5764461d5ec4 Subject: Re: LF: Testing Audioinjector Octo with RPi3 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit 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 Hello Paul,  Can multiple 2 channel audioInjectors be stacked up on the Raspberry Pi, to get 4 channels ? Can a single 2 channel audioinjector be used with a USB 2 channel audio card, for 4 channels ? How about 2 separate USB audio cards for 4 channels of input ? How are the 3 needed channels used ?  GPS/PPS, E filed antenna, and H field antenna ? Slowly getting started... Stan, W1LE    Cape Cod   FN41sr On 2/25/2018 1:32 AM, Paul Nicholson wrote: > > A four day run of the Octo sampling at 48k/sec with PPS from > a neo-m8t.   The PPS jitter is around 30nS most of the time, > >  http://abelian.org/vlf/tmp/180225a.png > > The Octo sample rate is also staying quite constant too. > The GPS has a poor view of the sky. > > The Octo is working well at 48k/sec. > > No feedback from the Flatmax Octo forum on the glitches at > 96k/sec.  Even if I keep the input level below 1.3V it looks > like the S/N is poor.   As it stands, it's not really usable > at that rate.  My LF rx project is stalled without a 3-channel > 96k/sec capture. > > Later today I'll put the Octo back to 96k/sec for another play. > > -- > Paul Nicholson > -- > >