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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:13.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT">Exploring HF with a SDR<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT">This Australian video shows how to use a Sofware Defined Radio to receive
unusual HF signals <br>
<br>
Among the transmissions shown are Wistlers, Radar, STANAG 4285, Link 11 and weather FAX.<br>
<br>
Watch HF and Software Defined Radio: HDSDR + USRP + GNU Radio + RFMap<br>
<br>
<a href="http://www.youtube.com/embed/ZuRcaxpbYCw?rel=0">http://www.youtube.com/embed/ZuRcaxpbYCw?rel=0</a>
<br>
<br>
Using SDR to receive HF<br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://wiki.spench.net/wiki/RF" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://wiki.spench.net/wiki/RF</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://spench.net" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://spench.net</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT">
@spenchdotnet </span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://twitter.com/spenchdotnet" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://twitter.com/spenchdotnet</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
<br>
HF with ultra-cheap-SDR RTL2832U-based DVB-T USB dongle <br>
<br>
<a href="http://www.youtube.com/embed/5y2XMvrlmiA?rel=0">http://www.youtube.com/embed/5y2XMvrlmiA?rel=0</a>
<br>
<br>
Files are now available on BitTorrent <br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://spench.net/download/HF-SDR.torrent" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://spench.net/download/HF-SDR.torrent</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT">
Please keep seeding!<br>
<br>
To use the recordings in GNU Radio, please apply this patch to your WAV File Source first:
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://wiki.spench.net/wiki/GNU_Radio_Patches#gr_wavfile-auxi" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://wiki.spench.net/wiki/GNU_Radio_Patches#gr_wavfile-auxi</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
Otherwise you will encounter a 'runtime error' as the original code doesn't like HDSDR recordings.<br>
<br>
Transmission types covered:<br>
<br>
Whistlers<br>
Ionosondes<br>
Weather fax (WEFAX)<br>
Flight Information Service<br>
Link 11 (TADIL A)<br>
RTTY<br>
Over-the-Horizon RADAR<br>
STANAG 4285<br>
Sweepers<br>
Unknown sweeping 'blocks'<br>
ACORN (Ocean RADAR)<br>
ALE (Automatic Link Establishment)<br>
OFDM (Orthogonal Frequency Division Multiplexing)<br>
DRM (Digital Radio Mondiale)<br>
<br>
Resources:<br>
<br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://maps.spench.net/rf/"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://maps.spench.net/rf/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://wiki.spench.net/wiki/USRP_Interfaces" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://wiki.spench.net/wiki/USRP_Interfaces</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://wiki.spench.net/wiki/BorIP" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://wiki.spench.net/wiki/BorIP</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://wiki.spench.net/wiki/OFDM" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://wiki.spench.net/wiki/OFDM</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
<br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://www.lucabarbi.it/oldweb/th/TH_Link11.pdf" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://www.lucabarbi.it/oldweb/th/TH_Link11.pdf</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://www.wavecom.ch/applicationnotes.htm" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://www.wavecom.ch/applicationnotes.htm</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://imos.org.au/acorn.html" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://imos.org.au/acorn.html</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://www.codar.com" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://www.codar.com</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://en.wikipedia.org/wiki/Automatic_link_establishment" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://en.wikipedia.org/wiki/Automatic_link_establishment</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://en.wikipedia.org/wiki/Whistler_(radio)" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://en.wikipedia.org/wiki/Whistler_(radio)</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><o:p></o:p></span></p>
<div class="MsoNormal" align="center" style="text-align:center"><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT">
<hr size="3" width="50%" noshade="" style="color:#A0A0A0" align="center">
</span></div>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
Links to SDR software packages:<br>
<br>
* You can use the cross-platform GNU Radio (used to do the pop-up analyses). It's a very powerful signal processing framework, so you can do almost anything in it:
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://gnuradio.org/" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://gnuradio.org/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
<br>
* HDSDR (the main one) runs on Windows: </span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://www.hdsdr.de/" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://www.hdsdr.de/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
<br>
* Sigmira (used for STANAG, but also does all the standard analog modes+some other digital ones) is cross-platform:
<br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://www.saharlow.com/technology/sigmira/" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://www.saharlow.com/technology/sigmira/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
<br>
* There are other Linux/cross-platform ones like:<br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://napan.ca/ghpsdr3/" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://napan.ca/ghpsdr3/</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
</span><span style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><a href="http://www.sm5bsz.com/linuxdsp/linrad.htm" target="_blank"><span lang="EN-US" style="color:#0000CC;text-decoration:none">http://www.sm5bsz.com/linuxdsp/linrad.htm</span></a></span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><br>
<br>
</span><span lang="EN-US" style="font-size:7.5pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT">Thanks to
<b>Dan M0TGN</b> and <b>David M0TFY</b> for spotting this interesting video</span><span lang="EN-US" style="font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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