Return-Path: Received: from rly-mh02.mx.aol.com (rly-mh02.mail.aol.com [172.21.166.138]) by air-mh02.mail.aol.com (v123.3) with ESMTP id MAILINMH024-bbc49c009d11f7; Tue, 17 Mar 2009 16:36:51 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mh02.mx.aol.com (v123.3) with ESMTP id MAILRELAYINMH024-bbc49c009d11f7; Tue, 17 Mar 2009 16:36:35 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Ljg13-0006jw-0f for rs_out_1@blacksheep.org; Tue, 17 Mar 2009 20:36:01 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Ljg12-0006jn-5P for rsgb_lf_group@blacksheep.org; Tue, 17 Mar 2009 20:36:00 +0000 Received: from mail-fx0-f174.google.com ([209.85.220.174]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Ljg0z-000513-Pi for rsgb_lf_group@blacksheep.org; Tue, 17 Mar 2009 20:36:00 +0000 Received: by fxm22 with SMTP id 22so250120fxm.4 for ; Tue, 17 Mar 2009 13:35:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :x-goomoji-body:date:message-id:subject:from:to:content-type; bh=z40ehdi6lFdmeJI6ug/SfDowiyv+qctYGr4YRmbdUM8=; b=Iivndb7iiYh6oUKqML1nr6m5oYELQiNuSN/4nVtJX1M+GiBmSbUZcZvjGawq8j24VN Q3hz2eXCPxPkLissTrEmLD74bngb7Xm4IZC/y/Ac20SQbuRvcGoEYzU8tvFKrZwkb7Jh DFlma8lGIl/JYBqiuBSLf8wsgyGCqA/0ViWGE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:x-goomoji-body:date:message-id :subject:from:to:content-type; b=CNcVlVvVUJMoQ9y4B8cl5WN31Exsqqwgm0BRlqGuDSEbVXo28A4o+nD0ttO7aUXUU7 F1DtU0vm7ak2cds4LYNlIa5TK/MTISWdPNTZLq1raOqQX3A46aAypy+Q1uiN8UwNUbJH f5MWW/uLmeV45zSDaqHLIV8IKhHCCwVGWwQSw= MIME-Version: 1.0 Received: by 10.204.55.15 with SMTP id s15mr132913bkg.53.1237322151591; Tue, 17 Mar 2009 13:35:51 -0700 (PDT) In-Reply-To: References: <005501c9a73b$dd0b8ac0$6401a8c0@asus> X-Goomoji-Body: true Date: Tue, 17 Mar 2009 20:35:51 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: RE: Who's playing on 503.7 Content-Type: multipart/related; boundary=001636c5990b5180f9046556831b X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60, HTML_FONTCOLOR_UNKNOWN,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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d297.2 ; domain : googlemail.com DKIM : pass X-Mailer: Unknown (No Version) --001636c5990b5180f9046556831b Content-Type: multipart/alternative; boundary=001636c5990b5180f2046556831a --001636c5990b5180f2046556831a Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable continued ... The black trace gives it away. If there is extended QRM that spans the noise measurement period (which is the WHOLE minute before) and the 5s Tx period it will show up on both. The different system of noise measurement explains why the (no QRMed) green and blue traces are not sitting on top of teh black trace. Ideally, with no signal there, they should. Andy G4JNT www.g4jnt.com 2009/3/17 Andy Talbot > I filled in a couple at 1800, deliberately, by flicking the test switch on > my beacon Tx. But there are too many peaks on the green annd blue > traces to not suspect someone else is firing up a Tx. > > Its not a case of false decodes - there's not such thing as a 'decode' wit= h > this monitoring S/W. All it does is to measure the signal power over > precisely this time slot, using a synchronised FFT with a bin size of > 0.2Hz, which after windowing gives about 0.4Hz noise bandwidth. So any QR= M > would have to be quite strong to make a significant impact, and persist ov= er > 5 seconds. Short spikes get averaged out to not-a-lot. > > Did the messages about the modified beacon timing software get though this > reflector - don't appear to see them in the in box? > > If not, http://www.g4jnt.com/beacons.htm at the bottom look for PCBCN > Directly, http://www.g4jnt.com/PCBCN.zip > > > Andy G4JNT > www.g4jnt.com > > > 2009/3/17 Gary - G4WGT > > *Hi Andy, LF,* >> >> * * >> >> *I have not detected anything here other than your Tx.* >> >> * * >> >> *I was going to e-mail anyway because I have some false decodes on the 5 >> & 6 minute slots, see list below. These coincide with high bursts of nois= e >> which I experience here from time to time. Is there an issue with the dec= ode >> software being =93foxed=94 by high noise level?* >> >> * * >> >> *Gary =96 G4WGT.* >> >> * * >> >> *15:45 40.35 25.76 -240.0 0.0* >> >> *15:46 41.05 25.76 -240.0 1499.5* >> >> *15:47 39.52 25.76 -240.0 0.0* >> >> *16:00 41.70 25.75 -240.0 1499.5* >> >> *16:01 41.62 25.75 -240.0 1510.6* >> >> *16:02 31.49 25.75 -240.0 0.0* >> >> *16:15 40.10 25.47 -240.0 0.0* >> >> *16:16 30.16 25.47 -240.0 0.0* >> >> *16:17 29.17 25.47 -240.0 0.0* >> >> *16:30 37.85 28.93 -240.0 0.0* >> >> *16:31 41.80 28.93 -240.0 0.0* >> >> *16:32 36.23 28.93 -240.0 0.0* >> >> *16:45 40.98 25.80 -240.0 1499.6* >> >> *16:46 29.45 25.80 -240.0 0.0* >> >> *16:47 30.17 25.80 -240.0 0.0* >> >> *17:00 35.23 25.58 -240.0 0.0* >> >> *17:01 28.35 25.58 -240.0 0.0* >> >> *17:02 35.28 25.58 -240.0 0.0* >> >> *17:15 45.32 25.10 -240.0 1499.4* >> >> *17:16 30.14 25.10 -240.0 0.0* >> >> *17:17 27.57 25.10 -240.0 0.0* >> >> *17:30 51.09 25.30 -240.0 1499.5* >> >> *17:31 53.16 25.30 -240.0 1499.6* >> >> *17:32 30.18 25.30 -240.0 0.0* >> >> *17:45 47.93 25.21 -240.0 1499.5* >> >> *17:46 48.63 25.21 -240.0 1499.5* >> >> *17:47 49.12 25.21 -240.0 1499.5* >> >> *18:00 38.75 34.29 -240.0 0.0* >> >> *18:01 32.01 34.29 -240.0 0.0* >> >> *18:02 28.89 34.29 -240.0 0.0* >> >> *18:15 51.36 26.01 -240.0 1499.6* >> >> *18:16 38.85 26.01 -240.0 0.0* >> >> *18:17 40.74 26.01 -240.0 0.0* >> >> *18:30 43.06 24.96 -240.0 1499.5* >> >> *18:31 29.24 24.96 -240.0 0.0* >> >> *18:32 29.61 24.96 -240.0 0.0* >> >> *18:45 36.98 26.26 -240.0 0.0* >> >> *18:46 34.87 26.26 -240.0 0.0* >> >> *18:47 36.14 26.26 -240.0 0.0* >> >> *19:00 50.09 26.57 -240.0 1499.7* >> >> *19:01 42.04 26.57 -240.0 1518.0* >> >> *19:02 28.58 26.57 -240.0 0.0* >> >> * * >> >> * * >> >> * * >> ------------------------------ >> >> *From:* owner-rsgb_lf_group@blacksheep.org [mailto: >> owner-rsgb_lf_group@blacksheep.org] *On Behalf Of *Andy Talbot >> *Sent:* 17 March 2009 19:48 >> *To:* rsgb_lf_group@blacksheep.org >> *Subject:* LF: Who's playing on 503.7 >> >> >> >> OK, Who is it? [?] >> >> We can see you >> >> There's activity in the 5 and 6 minutes slots. >> >> >> >> >> >> >> Andy G4JNT >> www.g4jnt.com >> > > --001636c5990b5180f2046556831a Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
continued ...
=A0
The black trace gives it away.=A0 If there is extended =A0QRM that span= s=A0 the noise measurement period (which is the WHOLE minute before) and the= 5s Tx period it will show up on both.=A0=A0 The different system of noise m= easurement=A0explains why the (no QRMed) green and blue traces are not sitti= ng on top of teh black trace.=A0=A0 Ideally, with no signal there, they shou= ld.

Andy =A0G4JNT
www= .g4jnt.com


2009/3/17 Andy Talbot <andy.g4jnt@googlemail.com>
I filled in a couple at 1800, deliberately, by flicking the test switch= on my beacon Tx.=A0=A0=A0But there are too many peaks on the green annd blu= e traces=A0to not suspect someone else is firing up a Tx.
=A0
Its not a case of false decodes - there's not such thing as a '= decode' with this monitoring S/W.=A0=A0 All it does is to measure=A0the=20= signal power over precisely =A0this time slot, using=A0a synchronised FFT wi= th a=A0bin size of 0.2Hz,=A0which after windowing gives=A0about 0.4Hz noise=20= bandwidth.=A0 So any QRM would have to be quite strong to make a significant= impact, and persist over 5 seconds.=A0=A0 Short spikes get=A0 averaged out=20= to not-a-lot.
=A0
Did the messages about the modified beacon timing software get though t= his reflector - don't appear to see them in the in box?
=A0
If not,=A0 http://www.g4jnt.com/beacons.htm=A0at the bottom look for PCBCN
=A0

Andy =A0G4JNT
www.g4jnt.com


2009/3/17 Gary - G4WGT <g4wgt@tiscali.co.uk= >=20

Hi Andy, LF,

=A0

I have not dete= cted anything here other than your Tx.

=A0

I was going to=20= e-mail anyway because I have some false decodes on the 5 & 6 minute slot= s, see list below. These coincide with high bursts of noise which I experien= ce here from time to time. Is there an issue with the decode software being=20= =93foxed=94 by high noise level?

=A0

Gary =96 G4WGT.=

=A0

15:45=A0 40.35= =A0 25.76=A0 -240.0=A0 0.0

15:46=A0 41.05= =A0 25.76=A0 -240.0=A0 1499.5

15:47=A0 39.52= =A0 25.76=A0 -240.0=A0 0.0

16:00=A0 41.70= =A0 25.75=A0 -240.0=A0 1499.5

16:01=A0 41.62= =A0 25.75=A0 -240.0=A0 1510.6

16:02=A0 31.49= =A0 25.75=A0 -240.0=A0 0.0

16:15=A0 40.10= =A0 25.47=A0 -240.0=A0 0.0

16:16=A0 30.16= =A0 25.47=A0 -240.0=A0 0.0

16:17=A0 29.17= =A0 25.47=A0 -240.0=A0 0.0

16:30=A0 37.85= =A0 28.93=A0 -240.0=A0 0.0

16:31=A0 41.80= =A0 28.93=A0 -240.0=A0 0.0

16:32=A0 36.23= =A0 28.93=A0 -240.0=A0 0.0

16:45=A0 40.98= =A0 25.80=A0 -240.0=A0 1499.6

16:46=A0 29.45= =A0 25.80=A0 -240.0=A0 0.0

16:47=A0 30.17= =A0 25.80=A0 -240.0=A0 0.0

17:00=A0 35.23= =A0 25.58=A0 -240.0=A0 0.0

17:01=A0 28.35= =A0 25.58=A0 -240.0=A0 0.0

17:02=A0 35.28= =A0 25.58=A0 -240.0=A0 0.0

17:15=A0 45.32= =A0 25.10=A0 -240.0=A0 1499.4

17:16=A0 30.14= =A0 25.10=A0 -240.0=A0 0.0

17:17=A0 27.57= =A0 25.10=A0 -240.0=A0 0.0

17:30=A0 51.09= =A0 25.30=A0 -240.0=A0 1499.5

17:31=A0 53.16= =A0 25.30=A0 -240.0=A0 1499.6

17:32=A0 30.18= =A0 25.30=A0 -240.0=A0 0.0

17:45=A0 47.93= =A0 25.21=A0 -240.0=A0 1499.5

17:46=A0 48.63= =A0 25.21=A0 -240.0=A0 1499.5

17:47=A0 49.12= =A0 25.21=A0 -240.0=A0 1499.5

18:00=A0 38.75= =A0 34.29=A0 -240.0=A0 0.0

18:01=A0 32.01= =A0 34.29=A0 -240.0=A0 0.0

18:02=A0 28.89= =A0 34.29=A0 -240.0=A0 0.0

18:15=A0 51.36= =A0 26.01=A0 -240.0=A0 1499.6

18:16=A0 38.85= =A0 26.01=A0 -240.0=A0 0.0

18:17=A0 40.74= =A0 26.01=A0 -240.0=A0 0.0

18:30=A0 43.06= =A0 24.96=A0 -240.0=A0 1499.5

18:31=A0 29.24= =A0 24.96=A0 -240.0=A0 0.0

18:32=A0 29.61= =A0 24.96=A0 -240.0=A0 0.0

18:45=A0 36.98= =A0 26.26=A0 -240.0=A0 0.0

18:46=A0 34.87= =A0 26.26=A0 -240.0=A0 0.0

18:47=A0 36.14= =A0 26.26=A0 -240.0=A0 0.0

19:00=A0 50.09= =A0 26.57=A0 -240.0=A0 1499.7

19:01=A0 42.04= =A0 26.57=A0 -240.0=A0 1518.0

19:02=A0 28.58= =A0 26.57=A0 -240.0=A0 0.0

=A0

=A0

=A0

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_= lf_group@blacksheep.org] On Behalf=20= Of Andy Talbot
Sent: 17 March 2009 19:48To: rsgb_lf_group@blacksheep.org<= br> Subject: LF: Who's playi= ng on 503.7

=A0

OK, Who is it?

We can see you

There's activity in the=A05 and 6 minutes slots.

=A0

=A0


Andy =A0G4JNT
www.g4jnt.com



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