Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5B8DB3800008D; Sat, 29 Jun 2013 13:47:24 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1UszDs-0000v5-2D for rs_out_1@blacksheep.org; Sat, 29 Jun 2013 18:46:08 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1UszDr-0000uw-HP for rsgb_lf_group@blacksheep.org; Sat, 29 Jun 2013 18:46:07 +0100 Received: from omr-d08.mx.aol.com ([205.188.109.207]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1UszDp-0003kG-Ac for rsgb_lf_group@blacksheep.org; Sat, 29 Jun 2013 18:46:06 +0100 Received: from mtaout-da03.r1000.mx.aol.com (mtaout-da03.r1000.mx.aol.com [172.29.51.131]) by omr-d08.mx.aol.com (Outbound Mail Relay) with ESMTP id 45701700028D1; Sat, 29 Jun 2013 13:46:03 -0400 (EDT) Received: from White (188-195-246-26-dynip.superkabel.de [188.195.246.26]) by mtaout-da03.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 188D7E000146; Sat, 29 Jun 2013 13:45:59 -0400 (EDT) Message-ID: <7D1F3B98C40B45DF84DF3FC8138E811A@White> From: "Markus Vester" To: , References: <003d01ce71b1$fc0c55e0$f42501a0$@comcast.net> <51C9B3DE.6070603@psk31.plus.com> <51C9D009.6030802@iup.uni-heidelberg.de> <51C9F5E2.5020507@iup.uni-heidelberg.de> <51CA027E.4040308@psk31.plus.com> <51CA0850.5060103@iup.uni-heidelberg.de> <51CB6FE1.6030103@charter.net> <001101ce736d$b1945180$0201a8c0@marco09cqcdi12> <51CC9B99.6090301@iup.uni-heidelberg.de> <2BE7AC2FD8F843EA967A9A4B65348142@White> <55C69C0F09EE4695B59B1EB122FD02A4@AGB> Date: Sat, 29 Jun 2013 19:45:57 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1372527963; bh=6iCEOMOwtuH0aa/ppe94M3viT42Y6Sfh6llxD3ofbQs=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=HAtCXNjeCaUzwd/B9SMwfJHVjUyj6xuZRs30bzMn4Ms4Dj3HQ54PW4vBq9+IXybBz vFEdt4ANJM0+nwJGUkijrJaUZQGCnuVDiLGw4iyj7RGhzkwb5128JKkmLL0ntrl4t0 Y4ql+qhQ2wh57yYQiUbVRoTnmJILQYhqfja/sQ3Y= X-AOL-SCOLL-SCORE: 0:2:399414656:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: -1.3 (-) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Graham, following your advice I've now taken out the SpecLab filter / noise blanker again. Not sure whether this will be for the better... anyway I'm aiming for a fair comparison of our two Opera reception methods. [...] Content analysis details: (-1.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [205.188.109.207 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -1.3 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 13ce2d45c6831942db3d21680606cc2e Subject: Re: LF: VO1NA Op32 137.555 kHz Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01CE7501.46C33B60" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_40_50,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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 x-aol-global-disposition: G x-aol-sid: 3039ac1d411a51cf1dab7552 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : temperror Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_000C_01CE7501.46C33B60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Graham, following your advice I've now taken out the SpecLab filter / noise = blanker again. Not sure whether this will be for the better... anyway = I'm aiming for a fair comparison of our two Opera reception methods. Re DCF39: yes the space freq (139.17) is above the mark (138.83 kHz). = But the biggest problem is the unfiltered FSK hardkeying, which (even at = 325 km) produces annoying splatter down to about 136.6 kHz during each = data telegram. That's almost 5 kHz occupied bandwidth for a 200 baud FSK = signal! Should be completely inacceptable by any standard, but = apparently fulfills specifications of their TRAM transmitter :-( Best 73, Markus (DF6NM) From: Graham=20 Sent: Friday, June 28, 2013 11:42 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: VO1NA Op32 137.555 kHz=20 Ok Marcus ,=20 Needs must , I dont think the frequency translation would be a = problem, but any modification to the envelope parameters will = degrade performance , the low s/n sdr decodes , point to the = lack of 'ringing' in the filters , enabling much lower levels , = notably , using the =A35 dongle in direct-sample , I see the = modulation is HF of the carrier , where with any of the = conventional Rx's , there is a splash across the band .=20 Strange that Iceland has not shown a decode , its about 1000 K = north of the direct path and half the range , expected ? 73 -G. From: Markus Vester=20 Sent: Friday, June 28, 2013 8:53 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: VO1NA Op32 137.555 kHz=20 yes. I'm aware that Opera should nominally be fed with straight = full-band SSB. But going by the first results, the preprocessing seemed = to help a lot in the presence of our strong DCF splatters, so I left it = in. In any case I'd need SL as an audio mixer to accomodate my fixed = 135.5 kHz LO. Best 73, Markus ... ------=_NextPart_000_000C_01CE7501.46C33B60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Graham,
 
following your advice I've now taken = out the=20 SpecLab filter / noise blanker again. Not sure whether this will be for = the=20 better... anyway I'm aiming for a fair comparison of our = two=20 Opera reception methods.
 
Re DCF39: yes the space freq (139.17) = is above the=20 mark (138.83 kHz). But the biggest problem is the unfiltered = FSK=20 hardkeying, which (even at 325 km) produces annoying splatter down to = about=20 136.6 kHz during each data telegram. That's almost 5 kHz occupied = bandwidth=20 for a 200 baud FSK signal! Should be completely inacceptable by any = standard, but apparently fulfills specifications of their TRAM = transmitter=20 :-(
 
Best 73,
Markus (DF6NM)

From: Graham
Sent: Friday, June 28, 2013 11:42 PM
To: rsgb_lf_group@blacksheep.org= =20
Subject: Re: LF: VO1NA Op32 137.555 kHz

Ok Marcus ,
 
Needs  must , I dont  think the   = frequency =20 translation  would be  a  problem, but any = modification  to=20 the  envelope parameters  will  degrade  performance = , =20 the  low  s/n sdr  decodes  , point to  = the =20 lack  of  'ringing'  in the  filters , = enabling  much=20 lower  levels , notably , using the  =A35   = dongle  in=20 direct-sample  , I see  the  modulation  is  HF = of=20 the  carrier  , where  with  any  of the =20 conventional  Rx's  , there is a  splash  = across =20 the  band .
 
Strange that  Iceland  has not  shown a  = decode  ,=20 its about  1000  K  north  of the  direct  = path=20 and  half the  range ,    expected  = ?
 
73 -G.
 
 
 
From: Markus Vester
Sent: Friday, June 28, 2013 8:53 PM
Subject: Re: LF: VO1NA Op32 137.555 kHz

yes. I'm aware that Opera should = nominally be=20 fed with straight full-band SSB. But going by the first = results, the=20 preprocessing seemed to help a lot in the presence = of our strong DCF=20 splatters, so I left it in. In any case I'd need SL as an = audio mixer to=20 accomodate my fixed 135.5 kHz LO.
 
Best 73,
Markus
 ...
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