Return-Path: Received: (qmail 26193 invoked from network); 18 Dec 2000 09:04:02 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 18 Dec 2000 09:04:02 -0000 Received: (qmail 27521 invoked from network); 18 Dec 2000 09:07:07 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 18 Dec 2000 09:07:07 -0000 Content-Transfer-Encoding: 8bit Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 147w9Y-0001sr-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 18 Dec 2000 09:00:16 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 147w9X-0001sm-00 for rsgb_lf_group@blacksheep.org; Mon, 18 Dec 2000 09:00:15 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id JAA00315; Mon, 18 Dec 2000 09:00:43 GMT Received: (qmail 17073 invoked from network); 18 Dec 2000 09:55:14 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 18 Dec 2000 09:55:14 -0000 Received: by gauntlet.mail.dera.gov.uk; id JAA25680; Mon, 18 Dec 2000 09:49:36 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma025632; Mon, 18 Dec 00 09:49:14 GMT Received: from frn-gold-1.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Mon, 18 Dec 2000 09:01:34 +0000 Received: by FRN-GOLD-1 with Internet Mail Service (5.0.1460.8) id ; Mon, 18 Dec 2000 08:59:43 -0000 Message-ID: <65AECDF1F89AD411900400508BFC869F0D7496@pdw-mail-1.dera.gov.uk> From: "Talbot Andrew" To: "LF Group \(E-mail\)" Subject: LF: FW: BPSK beacon test Date: Mon, 18 Dec 2000 08:59:54 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1460.8) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: This was sent direct to me but I feel should be diseminated : Andy G4JNT =========================================== -----Original Message----- From: Alan Melia [mailto:Alan.Melia@btinternet.com] Sent: 2000-12-16 14:41 To: rsgb_lf_group@blacksheep.org Subject: LF: BPSK beacon test Hi Andy, your signal in ID this morning was about 589 here. By tuning my loop to 73kHz and putting it at right angles to you and disconnecting the (136 tuned) wire, I was able to reduce to signal to a barely discernable smudge on Spectrogram (whilst still having to cope with some band noise), when there was no local noise. The BPSK sync'ed and kept in synchronism but with quite a few character corruptions. Installing GRAB 16 9 gave me almost perfect copy. The odd corrupted characters being audibly connected to bursts of local noise. Generally pages of perfect copy even at that S/N level. I was using a VE2IQ Sigma-Delta PCB and AFRICAM. The system maintained sync well despite me not having tweaked the 1.8MHz rock exactly onto frequency (it is 140Hz high). This gives me a lot of confidence that I would have spotted Larry if he had popped out of the noise over the last 3 weeks since I have been using this set-up. I made no adjustments to the RX at all and initial sync came within 4 chars. This system works a lot better than the soundcard set up due I think to more accurate sampling. The BitPhase stays fairly constant though it does switch backwards and forwards by as much as 10%. I must get a JNT version of the card built up! I would think that signal should be copiable well into Europe. Thanks for the test, Cheers de Alan G3NYK JO02PB Alan.Melia@btinternet.com -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.