Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-me03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 00DE538000099; Mon, 23 Jan 2012 14:02:36 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RpOiD-0002xb-Bu for rs_out_1@blacksheep.org; Mon, 23 Jan 2012 18:33:49 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RpOiC-0002xS-Vr for rsgb_lf_group@blacksheep.org; Mon, 23 Jan 2012 18:33:48 +0000 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RpOiA-0007bn-HV for rsgb_lf_group@blacksheep.org; Mon, 23 Jan 2012 18:33:48 +0000 Received: from AGB ([2.26.46.86]) by mwinf5d39 with ME id R6Zf1i00R1rZoJA036ZfoC; Mon, 23 Jan 2012 19:33:40 +0100 Message-ID: From: "Graham" To: References: <4F1D9403.14647.10EA588A@mike.dennison.ntlworld.com> In-Reply-To: Date: Mon, 23 Jan 2012 18:33:39 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: avast! (VPS 120123-0, 23/01/2012), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=disabled,RCVD_ILLEGAL_IP=0.234 Subject: Re: LF: Opera beacons Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.1 required=5.0 tests=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-SCOLL-SCORE: 0:2:497307456:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d608b4f1daecc1106 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Up to 60 simultaneous decodes are possible .. but Mike may be in ground wave range of other stations , longer times may give better results but would / will also take thing's back to the bad old days . 60 seconds is producing reliable results on HF , 120 seconds may be sufficient for 500K with 8 mins qrp back up , I observed on 15 min tx fail to decode TA , only for the next 4 min to be decoded ...... G.. -------------------------------------------------- From: "Andy Talbot" Sent: Monday, January 23, 2012 6:26 PM To: Subject: Re: LF: Opera beacons > It doesn't matter. > The decoding of the previous transmission can take place while the > current one is being received. > > My PIC source, in 100% duty cycle mode, just sends the sequence end to > end with no gap, and the decoder had not problems with that > > 'jnt > > > On 23 January 2012 17:08, Mike Dennison > wrote: >> I notice that some Opera stations beacon at intervals shorter than >> the length of their beacon, which presumably means the beacon is >> running continuously. >> >> Is this useful? It does not leave any space for the beacon station, >> or those near him, to receive. Or have I missed something? >> >> Mike, G3XDV >> ========== >> >