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</o:shapelayout></xml><![endif]--></head><body lang=PT link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> ct-comunicacoes-e-tecnologias@googlegroups.com [mailto:ct-comunicacoes-e-tecnologias@googlegroups.com] <b>Em nome de </b>Antonio Matias<br><b>Enviada:</b> sexta-feira, 11 de Maio de 2012 16:07<br><b>Para:</b> ct-comunicacoes-e-tecnologias@googlegroups.com<br><b>Assunto:</b> [CT-Com. & Tec.] Opera Beacons<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Desconhecia este novo modo de beacons.<o:p></o:p></p><div><p class=MsoNormal>Há um colega que procura "dadores"<o:p></o:p></p></div><div><p class=MsoNormal>Parece interessante, mas se é preciso um PC para descodificar, creio não haver grande vantagem contra o velhinho CW.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Retirado do forum dos 4m:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>""""""<span style='font-size:10.0pt;font-family:"Georgia","serif";color:#2A2A2A;background:white'>Wanted !! Opera Beacon/qso testers </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Georgia","serif";color:#2A2A2A'><br><span style='background:white'>Opera is standalone digital mode , using SS data processing and ON/OFF single carrier keying. It is unique in that upto 50% of the transmission, randomly along the time time, may be lost , whilst still fully decoding. </span><br><br><span style='background:white'>The on/off keying thus enables 'any' Tx to be used , eg, ex-pmr , fm radios , ssb , or CW , PIC+DDS systems etc </span><br><br><span style='background:white'>The QSO mode allows upto 15 Chrs to be sent at a min decode level of -20 dB (s/n readings are based on average and display approx +6dB higher than wspr) and takes 120 seconds to tx. </span><br><br><span style='background:white'>The 30 second beacon version is provided to enable aircraft meteor propagation to be investigated , requiring 15 seconds of the TX for minimum decode </span><br><br><span style='background:white'>NO Internet time locking is required , web linking provides distance and other station info , but plays no part in the tx/rx </span><br><br><span style='background:white'>With the on set of summer, it could be a ideal time to add the Opera beacon to any CW beacon's , experimental or otherwise </span><br><br><span style='background:white'>Opera is now in wide spread use from experimental air&ground transmission on 8Khz, 136/500 Khz , HF up to VHF , </span><br><br><span style='background:white'>The software has provision for direct CW keying of the Tx via the com-port, or direct audio drive, via ,ssb conversion, separate PTT and Key outputs are provide for station switching </span><br><br><span style='background:white'>A PIC code facility also provided to allow PIC tx control , encoding the station call sign. </span><br><br><span style='background:white'>Reception is via recovered audio from a conventional SSB receiver, to pc sound card as per other data modes. </span><br><br><span style='background:white'>The beacon is directly linked to the psk-reporting map. as well as to other users , sharing reports and tx announcements via the web </span><br><br><span style='background:white'>Encoded are the following frequency's , for normal use , all that is needed is the usb-dial set frequency , but for direct keying of a standalone beacon, then the carrier frequency, must be placed inside the bracketed qrg , to ensure the correct Rx pass band is addressed , </span><br><br><span style='background:white'>OP1 70.090 usb dial QSO (7000912 700916) </span><br><span style='background:white'>OP1 Beacon (700916 7009200) </span><br><span style='background:white'>OP0.5 70.091 usb dial Beacon only (70.0926 / 70.093 ) </span><br><br><span style='background:white'>If the station cannot directly be set via the CAT , then this must be disabled and the appropriate Opera qrg selected from the list, this in turn selects the correct mode </span><br><br><span style='background:white'>73 -Graham </span><br><span style='background:white'>G0NBD </span><br><br><span style='background:white'>Download site >> </span></span><a href="http://rosmodem.wordpress.com/2011/01/10/ros-2/" target="_blank"><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1E66AE;background:white'>http://rosmodem.wordpress.com/2011/01/10/ros-2/</span></a><span style='font-size:10.0pt;font-family:"Georgia","serif";color:#2A2A2A;background:white'> </span><span style='font-size:10.0pt;font-family:"Georgia","serif";color:#2A2A2A'><br><br><span style='background:white'>user group >> </span></span><a href="http://groups.yahoo.com/group/O_P_E_R_A_/?yguid=131323118" target="_blank"><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1E66AE;background:white'>http://groups.yahoo.com/group/O_P_E_R_A_/?yguid=131323118</span></a><o:p></o:p></p></div><div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <br>António Matias<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>CT1FFU - CR5A <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://www.dxpatrol.com" target="_blank">www.dxpatrol.com</a> <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>QRV: HF, 6m, 4m,2m,70cm,23cm<o:p></o:p></p></div><div><p class=MsoNormal>SSB, CW, MGM<o:p></o:p></p></div><div><p class=MsoNormal>DX, EME, Contest,Sat.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>POBOX-38<o:p></o:p></p></div><div><p class=MsoNormal>2504-909<o:p></o:p></p></div><div><p class=MsoNormal>Caldas da Rainha<o:p></o:p></p></div><div><p class=MsoNormal>Portugal<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <br>Para mais informações/opções visite o site, e edite a sua conta:<br><a href="http://groups.google.com/group/ct-comunicacoes-e-tecnologias?hl=en?hl=pt-PT">http://groups.google.com/group/ct-comunicacoes-e-tecnologias?hl=en?hl=pt-PT</a><o:p></o:p></p></div></body></html>