Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 175A0380000A4; Tue, 31 Jan 2012 17:58:38 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RsMeA-00051f-Px for rs_out_1@blacksheep.org; Tue, 31 Jan 2012 22:57:54 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RsMeA-00051W-BF for rsgb_lf_group@blacksheep.org; Tue, 31 Jan 2012 22:57:54 +0000 Received: from blu0-omc1-s5.blu0.hotmail.com ([65.55.116.16]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RsMe9-0004Rk-OQ for rsgb_lf_group@blacksheep.org; Tue, 31 Jan 2012 22:57:54 +0000 Received: from BLU153-W54 ([65.55.116.8]) by blu0-omc1-s5.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Tue, 31 Jan 2012 14:57:46 -0800 Message-ID: X-Originating-IP: [138.32.32.166] From: Laurence KL7UK To: Date: Tue, 31 Jan 2012 13:57:46 -0900 Importance: Normal In-Reply-To: References: <006201cce044$06c16f80$0401a8c0@xphd97xgq27nyf>,<3A9A60CAE4EB4355A5B0A30CDA0F450A@JimPC>, MIME-Version: 1.0 X-OriginalArrivalTime: 31 Jan 2012 22:57:46.0691 (UTC) FILETIME=[BF900130:01CCE06B] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary="_d1ca671b-fb29-4388-9d57-6083d2966287_" Subject: RE: LF: RE: Re: Opera v qrs evaluation 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=FORGED_HOTMAIL_RCVD, HTML_MESSAGE 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-SCOLL-SCORE: 0:2:466235040:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d4ad24f28721e2f85 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --_d1ca671b-fb29-4388-9d57-6083d2966287_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Rik - thanks for this - my experiences to date operating from a Central cit= y location in Tiajin China was that WSPR outperformed even dot20 slow qrss = in an awfully screen noisy environment - now this was at 500kHz not 137 so = QSB etc kinda different. =20 I tried for a long time to catch SM6BHZ on shortpath on all QRSS modes over= a period but the only time I have positive ID on multiple nights (really p= ositive not squinting and brain eliminating certain squiggles) was on WSPR = using two PC's and a buffered output from the R75 - the visual noise and ty= pe of Chinese squiggles made it near impossible to see clearly what was goi= ng on - but save on one night when Im pretty sure I had a clean QRSS recept= ion of WD2XNS from over the Pole - conditions that night were "remarkable" = from memory -=20 =20 However working out of Singapore/Sabah it was different where visual QRSS o= utperformed WSPR...different QRM/QRN impulse noises.. =20 Different QRM/Source noises appeared to give different results -=20 =20 If anyone is interested the Transpolar North Route to Alaska is still close= d (dang it) I can just detect HGA22 visually at dot 60 slow - so some 45dBs= or more of attenuation still in place :-(( =20 Laurence Kl7UK remotely controlled from South of the Border... =20 =20 =20 =20 > From: Rik.Strobbe@fys.kuleuven.be > To: rsgb_lf_group@blacksheep.org > Date: Tue=2C 31 Jan 2012 23:36:46 +0100 > Subject: LF: RE: Re: Opera v qrs evaluation >=20 > Dear all=2C >=20 > I did an atempt to compare Opera with WSPR=2C QRSS3 and DFCW10. > I did it by generating audiofiles that contain a Opera2=2C WSPR=2C QRSS3 = and DFCW signal of identical amplitude (but slightly different frequency an= d add a known amount of (white) noise to get a known SNR. > I started from -20dB and then down in 1dB steps=2C till -33dB. For each S= NR level I generated 5 audiofiles. > All was done by a small application I wrote. >=20 > Results: = --_d1ca671b-fb29-4388-9d57-6083d2966287_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Rik - thanks for this - my experiences to date operating from =3Ba Cent= ral city location in Tiajin China was that WSPR outperformed even dot20 slo= w qrss in an awfully screen noisy environment - now this was at 500kHz = =3Bnot 137 so QSB etc kinda different.
 =3B
I tried for a long time to catch SM6BHZ =3Bon shortpath on all QRSS mod= es over a period but the only time I have positive ID on multiple nights&nb= sp=3B(really positive not squinting and =3Bbrain eliminating certain sq= uiggles) =3Bwas on WSPR using two PC's and a buffered output from the R= 75 - the visual noise and type of Chinese squiggles made it near impossible= to see clearly what was going on - but save on one night when Im pretty su= re I had a clean QRSS reception of WD2XNS from over the Pole - conditions t= hat night were "remarkable" from memory -
 =3B
However working out of Singapore/Sabah it was different where visual QRSS o= utperformed WSPR...different QRM/QRN impulse noises..
 =3B
Different QRM/Source noises appeared to give different results -
 =3B
If anyone is interested the Transpolar North Route to Alaska is still close= d (dang it) I can just detect HGA22 visually at dot 60 slow =3B- so som= e 45dBs or more of attenuation still in place :-((
 =3B
Laurence Kl7UK remotely controlled from South of the Border...
 =3B
 =3B
 =3B
 =3B
>=3B From: Rik.Strobbe@fys.kuleuven.b= e
>=3B To: rsgb_lf_group@blacksheep.org
>=3B Date: Tue=2C 31 Jan = 2012 23:36:46 +0100
>=3B Subject: LF: RE: Re: Opera v qrs evaluation>=3B
>=3B Dear all=2C
>=3B
>=3B I did an atempt to com= pare Opera with WSPR=2C QRSS3 and DFCW10.
>=3B I did it by generating = audiofiles that contain a Opera2=2C WSPR=2C QRSS3 and DFCW signal of identi= cal amplitude (but slightly different frequency and add a known amount of (= white) noise to get a known SNR.
>=3B I started from -20dB and then do= wn in 1dB steps=2C till -33dB. For each SNR level I generated 5 audiofiles.=
>=3B All was done by a small application I wrote.
>=3B
>= =3B Results:
= --_d1ca671b-fb29-4388-9d57-6083d2966287_--