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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi folks,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>‘rtl-sdr’ is a great development. Thank you to all involved!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’d like to throw in my bit: I’ve just released a beta version of my <a href="http://wiki.spench.net/wiki/ExtIO_USRP">ExtIO plugin</a> with support for RTL2832+E4000 (my one is called ‘ezcap’). This means you can use the DVB-T USB stick with <a href="http://www.winrad.org/">Winrad</a>/<b><a href="http://www.hdsdr.de/">HDSDR</a></b>/WRplus, etc.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><a href="http://spench.net/r/USRP_Interfaces">http://spench.net/r/USRP_Interfaces</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve done a fair bit of <a href="http://wiki.spench.net/wiki/RF">work</a> in GNU Radio, but I find having a simple/functional ‘software specan’ (i.e. those apps) is another great test tool. The ExtIO plugin also lets you stream the received baseband data from the app to GNU Radio over your LAN (just use the UDP Source block!).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Apart from RTL2832, the plugin also supports all USRPs, the FUNcube Dongle, and functions as a network client if you choose to connect your SDR hardware to a separate computer and wish to stream the data & control the radio across your LAN (lossless, compared to having to use a long length of coax!). This protocol/implementation is called <a href="http://wiki.spench.net/wiki/BorIP">BorIP</a>, and is essentially a transparent network abstraction for the SDR receivers mentioned above (not really necessary if you have a LAN-enabled USRP, but great for USRP 1 & B100). The BorIP server is included with the plugin’s installer.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Additionally, I recently released many new blocks (in the <a href="http://wiki.spench.net/wiki/Gr-baz">gr-baz</a> module) and <a href="http://wiki.spench.net/wiki/GNU_Radio_Patches">patches</a> for GNU Radio too, part of which enables native BorIP reception support in GNU Radio (BorIP Source block, and BorIP protocol/packet support for UDP Source Block). The enhanced Source blocks are handy because they will notify you of hardware/buffer overruns at the server and network packet loss. Other new blocks help with automatic FEC decoding, and also include Variable Delay (great for blind signal analysis), a simple eye diagram sink (originally from <a href="http://op25.osmocom.org/">OP25</a>) and a <a href="http://wiki.spench.net/wiki/Fast_Auto-correlation">Fast Auto-correlation Sink</a> (originally from ‘Frank’).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m probably going to add my own implementation of a native RTL2832 Source block to gr-baz tonight, so I may post again soon…<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hope this is useful!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kind regards,<o:p></o:p></p><p class=MsoNormal>Balint <a href="http://twitter.com/spenchdotnet">@spenchdotnet</a><o:p></o:p></p></div></body></html>