Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 067E1380000BD; Sun, 28 Oct 2012 08:45:33 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TSSES-0001Hj-0M for rs_out_1@blacksheep.org; Sun, 28 Oct 2012 12:44:48 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TSSER-0001Ha-Bj for rsgb_lf_group@blacksheep.org; Sun, 28 Oct 2012 12:44:47 +0000 Received: from smtpout3.wanadoo.co.uk ([80.12.242.59] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TSSEO-000099-Qn for rsgb_lf_group@blacksheep.org; Sun, 28 Oct 2012 12:44:46 +0000 Received: from AGB ([2.26.47.159]) by mwinf5d42 with ME id Gckg1k00B3S4B9u03ckgc5; Sun, 28 Oct 2012 13:44:44 +0100 Message-ID: <4007B39A38184475A33ED6B316A1262A@AGB> From: "Graham" To: References: <4084B089A7FF496CAC1CE9A2459B9C47@AGB> In-Reply-To: <4084B089A7FF496CAC1CE9A2459B9C47@AGB> Date: Sun, 28 Oct 2012 12:44:40 -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-Spam-Score: 2.1 (++) 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: All, We have a working version of the Opera beacon , with OP1 and OP2 modes based on the 17Khz audio band. noting any version may be coded, this represents a first of trial. The version is fully functional and compatible with the standard version in terms of data , so may be decoded via sound-card SDR or via conventional translation to base band audio using one of the vhf/uhf settings. [...] Content analysis details: (2.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.59 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 2.0 MANY_SPAN_IN_TEXT Many tags embedded within text X-Scan-Signature: a3a1dfa33e290fbc5bf9437ae2cb4207 Subject: Re: LF: OPERA OPTICAL BEACON (way off topic) but is based on 17 KHz :) Content-Type: multipart/alternative; boundary="----=_NextPart_000_008B_01CDB509.FF279650" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_60_70,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: 3039ac1d60d8508d28ed6b66 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_008B_01CDB509.FF279650 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable All, We have a working version of the Opera beacon , with OP1 and OP2 = modes based on the 17Khz audio band. noting any version may be = coded, this represents a first of trial. The version is fully functional and compatible with the standard = version in terms of data , so may be decoded via sound-card SDR or = via conventional translation to base band audio using one of the = vhf/uhf settings. At this stage , the file is a separate exe 'Opera Light.exe' to run the exe , its necessary to install a working version of the = standard system to provide dll's etc and paste the 'exe' into the same = directory=20 If any one would like to try the system , I can email the file = directly , the final version will be incorporated into the main = download. As the Opera system is incorporated in Bo's OZ2M fixed beacon keying = system , Philip Gladstone , psk-reporting map , is providing addition = SHF bands to his map, and I have requested a 'optical' band be added = to compliment this addition. At the moment, please contact me directly for a copy of the exe file = at g0nbd@hotmail.com 73-Graham G0NBD From: Graham=20 Sent: Wednesday, October 24, 2012 9:18 PM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: OPERA OPTICAL BEACON (way off topic) but is based on 17 KHz = :) Pre release information=20 =20 OPERA OPTICAL BEACON variation=20 =20 Based on the lecture given by Stuart Wisher G8CYW at the RSGB = convention , outlining the use of a high frequency audio sub = carrier for optical communications , where the light source was = modulated with a 17 KHz carrier to enable various modulations to = be carrier above the audio 0>3Khz base band, thereby eliminating = most of the QRM.=20 =20 Following this example , a modified version of the 'Opera beacon' = is in development , with direct audio input / output based in the = 15 to 17 KHz range , with intended OP0.5 and OP2 modes [ 30 = second and 120 second tx cycle time] , OP0.5 has been proven in = scatter tests on vhf and OP2 has similar sensitivity as the wspr = system.=20 =20 The Opera beacon system is a free running one pass decode data = system , with no internet time locking requirement , utilising = On/off keying (ook) of a single carrier , transmitting 256 data = bits. Transmission either by way of a keyed audio output, as per = normal data mode soundcard interface or a simple com-port cw = keyer of an existing 'cw' system , Tx/Rx com-port ptt switching is = also provided. =20 Where as the Tx format remains the same for all , the decoder = has variations linked to the assigned band, propagation and , the = Tx duration is used to set the sensitivity , with versions from = 30 seconds to 4 hours , -20 dB s/n to -50 dB s/n. =20 CAT control and SDR interfaces are provided as part of the = windows based software package , as is a 'PIC Code' , which may = be used to code a stand alone pic controlled beacon, as is a = internet chat facility and spot upload to the psk-reporting web = site , decodes from other users are also directly routed to all = web-linked users , with single band or 'all' band filtering. =20 The latest version may be downloaded from http://rosmodem.wordpress.com/ Notification will be posted when the 15/17Khz modem is embodied=20 ------=_NextPart_000_008B_01CDB509.FF279650 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

All,

We have a working version of the Opera beacon , = with OP1=20 and OP2 modes based on the 17Khz audio band. noting = any=20 version may be coded, this represents a first of = trial.

The version is fully functional and compatible with the = standard version in terms of data , so may be decoded = via =20 sound-card SDR or via conventional translation to base = band =20 audio using one of the vhf/uhf settings.

At this stage , the file is a separate = exe =20 'Opera Light.exe'
to run the exe , its necessary to = install=20 a working version of the standard system to provide dll's = etc and=20 paste the 'exe' into the same directory

If any one would like to try the system , I can = email=20 the file directly , the final version will = be =20 incorporated into the main download.

As the Opera system is incorporated in Bo's OZ2M fixed beacon = keying=20 system , Philip Gladstone , psk-reporting map , is providing = addition SHF=20 bands to his map, and I have requested a 'optical' band = be =20 added to compliment this addition.

At the moment, please contact me directly for a copy of = the exe file at g0nbd@hotmail.com

73-Graham
G0NBD

From: Graham

Sent: Wednesday, October 24, 2012 9:18 PM

To: rsgb_lf_group@blacksheep.org= =20

Subject: LF: OPERA OPTICAL BEACON (way off topic) but is = based on 17=20 KHz :)

Pre release = information=20

OPERA OPTICAL BEACON variation =

Based on =20 the lecture given by Stuart Wisher G8CYW at the RSGB convention , outlining = the use of a =20 high = frequency audio sub carrier for optical communications , where the light source was modulated with a 17 KHz carrier to enable various modulations to =20 be carrier above the audio 0>3Khz base band, thereby eliminating most of the QRM. =

Following =20 this example , = a modified version of the =91Opera beacon=92 is =20 in development , with =20 direct audio input / output based in the 15 to 17 KHz range , with intended OP0.5 and =20 OP2 modes [ 30 second and 120 second tx =20 cycle time] , = OP0.5 has=20 been proven in scatter = tests on vhf and OP2 has similar sensitivity as the wspr system.

The =20 Opera beacon system is a =20 free running one pass decode data system , with no =20 internet time = locking requirement , utilising = On/off keying (ook) of a =20 single carrier ,=20 transmitting = 256 data bits. Transmission either by way of a keyed audio output, as per normal data mode soundcard interface or a simple com-port cw =20 keyer of an = existing =91cw=92=20 system , Tx/Rx = com-port ptt switching is also provided.

Where = as=20 the Tx format remains the same for all , the decoder has variations linked to the assigned band, propagation = and , the Tx duration is =20 used to set = the sensitivity , with versions from 30 =20 seconds to 4 =20 hours , -20 dB s/n to -50 dB = s/n.

CAT control and SDR interfaces are provided as =20 part of the = windows based software package , as is =20 a =91PIC = Code=92 , which may be =20 used to code = a stand alone pic controlled beacon, as is =20 a internet chat facility and =20 spot upload to the =20 psk-reporting = web site , decodes from other users are also directly routed to = all web-linked users , with single band or =20 =91all=92 = band filtering.

The latest version may be downloaded from http://rosmodem.wordpress.com/

Notification will be = posted when=20 the 15/17Khz modem is embodied=20

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