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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I run an AisPy R2 here with 10 MHz locked to GPS <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I figure that’s as good as its going to get<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Andrew <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> OZAPRS [mailto:ozaprs-bounces@aprs.net.au] <b>On Behalf Of </b>Gavin Rogers<br><b>Sent:</b> Sunday, 19 November 2017 2:48 PM<br><b>To:</b> Australian APRS Users <ozaprs@aprs.net.au><br><b>Subject:</b> Re: [OZAPRS] Calibration Signals<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Yes, but often on frequencies outside the tuning range of a RTL SDR and the complex modulation I guess would need specific calibration software like kal is for GSM, and I haven't seen any.<br><br><o:p></o:p></p><div><p class=MsoNormal>On 19 November 2017 12:33:52 pm AWST, <a href="mailto:vk4tec@tech-software.net">vk4tec@tech-software.net</a> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><p class=MsoNormal><span style='mso-fareast-language:EN-US'>4G should be very good<o:p></o:p></span></p><p><span style='mso-fareast-language:EN-US'> <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>They have some of the best frequency and time standards<o:p></o:p></span></p><p><span style='mso-fareast-language:EN-US'> <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>They have to because of the CDMA modulation<o:p></o:p></span></p><p><span style='mso-fareast-language:EN-US'> <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Andrew <o:p></o:p></span></p><p><span style='mso-fareast-language:EN-US'> <o:p></o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> OZAPRS [<a href="mailto:ozaprs-bounces@aprs.net.au">mailto:ozaprs-bounces@aprs.net.au</a>] <b>On Behalf Of </b>Gavin Rogers<br><b>Sent:</b> Sunday, 19 November 2017 2:27 PM<br><b>To:</b> Australian APRS Users <<a href="mailto:ozaprs@aprs.net.au">ozaprs@aprs.net.au</a>><br><b>Subject:</b> Re: [OZAPRS] How to make a raspberry pi satgate for the ISS<o:p></o:p></span></p></div></div><p> <o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Maybe different in other states, but in Perth the only carrier with GSM still is Vodadone, and their coverage isn't good enough where I am to get a good calibration.<br><br><o:p></o:p></p><div><p class=MsoNormal>On 19 November 2017 11:21:49 am AWST, Peter VK2MPJ <<a href="mailto:vk2mpj@yahoo.com.au">vk2mpj@yahoo.com.au</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><p class=MsoNormal>I’m curious why you say that using kal and a GSM signal is not possible anymore?<o:p></o:p></p><div><p class=MsoNormal>I did this locally just last weekend…<o:p></o:p></p></div><div><p> <o:p></o:p></p></div><div><p class=MsoNormal>2MPJ<o:p></o:p></p></div><div><p> <o:p></o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On 19 Nov 2017, at 12:42 pm, Gavin Rogers <<a href="mailto:grogers@vk6hgr.echidna.id.au">grogers@vk6hgr.echidna.id.au</a>> wrote:<o:p></o:p></p></div><p> <o:p></o:p></p><div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif'>On 19/11/2017 9:30 AM,<span class=apple-converted-space> </span><a href="mailto:vk4tec@tech-software.net"><span style='color:purple'>vk4tec@tech-software.net</span></a><span class=apple-converted-space> </span>wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt;font-variant-caps: normal;orphans: auto;text-align:start;widows: auto;-webkit-text-size-adjust: auto;-webkit-text-stroke-width: 0px;word-spacing:0px'><p><span style='font-family:"Helvetica",sans-serif;background:white'> <o:p></o:p></span></p><div><div><div><p class=MsoNormal style='background:white'><span style='background:white'>Or, as i've mentioned before, just link to the existing Direwolf SDR+APRS guide, which covers off setting up an igate pretty well: <a href="https://github.com/wb2osz/direwolf/blob/master/doc/Raspberry-Pi-SDR-IGate.pdf" target="_blank"><span style='color:purple'>https://github.com/wb2osz/direwolf/blob/master/doc/Raspberry-Pi-SDR-IGate.pdf</span></a><o:p></o:p></span></p></div></div></div></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white'><br>In this guide, there's a link to a script that will tune to a NOAA frequency and re-calibrate an SDR TV stick (<span class=apple-converted-space> </span></span><span style='background:white'><a href="https://github.com/khaytsus/direwolf-init"><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:purple'>https://github.com/khaytsus/direwolf-init</span></a></span><span class=apple-converted-space><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white'> </span></span><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white'>)<br><br>What would be a good high-stability signal source here in VK for the calibration? I used to use the kal program to calibrate against GSM transmitters, but that's not possible any more. I'd think the trunking control channel for an emergency services' channel would be stable, strong and always on? Or DAB+ transmitter, or..?<br><br><br>73<br>Gavin.</span><span style='background:white'><o:p></o:p></span></p><p><span style='font-family:"Helvetica",sans-serif;background:white'> <o:p></o:p></span></p><pre style='background:white;font-variant-caps: normal;text-align:start;-webkit-text-stroke-width: 0px;word-spacing:0px'><span style='font-size:9.0pt;background:white'>-- <o:p></o:p></span></pre><p style='background:white'><span style='font-size:9.0pt;font-family:"Courier New";background:white'> <o:p></o:p></span></p><pre style='background:white'><span style='font-size:9.0pt;background:white'> Gavin Rogers | Amateur radio station VK6HGR <o:p></o:p></span></pre><pre style='background:white'><span style='font-size:9.0pt;background:white'> <a href="http://www.livingwaters.com/good"><span style='color:purple'>http://www.livingwaters.com/good</span></a> | <a href="http://vk6hgr.ampr.org/"><span style='color:purple'>http://vk6hgr.ampr.org/</span></a><o:p></o:p></span></pre><pre style='background:white'><span style='font-size:9.0pt;background:white'> MSN/Skype/Email: <a href="mailto:grogers@vk6hgr.echidna.id.au"><span style='color:purple'>grogers@vk6hgr.echidna.id.au</span></a><o:p></o:p></span></pre><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white'>_______________________________________________<br>OZAPRS mailing list<br></span><span style='background:white'><a href="mailto:OZAPRS@aprs.net.au"><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:purple'>OZAPRS@aprs.net.au</span></a></span><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;background:white'><br></span><span style='background:white'><a href="http://lists.aprs.net.au/mailman/listinfo/ozaprs"><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:purple'>http://lists.aprs.net.au/mailman/listinfo/ozaprs</span></a><o:p></o:p></span></p></div></blockquote></div><p><span style='background:white'> <o:p></o:p></span></p></div></blockquote></div></blockquote></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='background:white'><br>-- <br>Gavin Rogers mobile<o:p></o:p></span></p></div></body></html>