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Re: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in gr-baz

From: Andrew Davis
Subject: Re: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in gr-baz
Date: Thu, 29 Mar 2012 16:43:21 -0400

This kinda thing is gonna be incredibly useful even to us with USRP's.
I've been working on a digital voice mode but without a second
expensive USRP I have no way to know what I'm broadcasting or how
reliable the modulation is. The uses for cheap, semi-disposable SDR's
are limitless!


On Thu, Mar 29, 2012 at 12:43 PM, Rafael Diniz <address@hidden> wrote:
> Indeed, F****ng awesome!
> Do you plan to submit upstream your gr-baz?
> People, in dealextreme store the dongle is sold out.
> I do not want to start an off-topic trend, but could you please mail me in
> private where are you buying such dongle?
> Best regards,
> Rafael Diniz
>> Awesome! I'm still waiting on my RTL-based card to arrive via snail-mail
>> from an unknown factory on the other side of the world. Will test when it
>> arrives!
>> From: address@hidden
>> [mailto:address@hidden On
>> Behalf Of Balint Seeber
>> Sent: Thursday, March 29, 2012 11:22 AM
>> To: address@hidden
>> Subject: [Discuss-gnuradio] RTL2832 ($20 USB SDR) support now in gr-baz
>> Hi folks,
>> I've just added RTL2832 support to gr-baz with support for both tuners
>> (Elonics E4000 and Fitipower FC0013).
>> If you're not aware, this is sold as a DVB-T USB receiver for ~$20, which
>> is a pretty decent price for a device that can do general purpose SDR at
>> 3.2 MHz and 8-bits! The journey starts with Antti
>> Palosaari<http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/44461/focus=44461>
>> who discovered it can be put in a mode where it streams baseband data
>> directly over USB (for analog FM demodulation in software). This resulted
>> in Steve Markgraf's rtl-sdr<http://sdr.osmocom.org/trac/wiki/rtl-sdr>
>> user-space capture utility over at Osmocom (see the Osmocom page to find
>> compatible devices).
>> I've taken that source and created a fully-featured GNU Radio Source block
>> 'baz.rtl_source_c'<http://wiki.spench.net/wiki/Gr-baz#rtl_source_c> (with
>> GRC block) that outputs complex values, and allows adjustment of
>> frequency, sample rate and LNA gain. There is also an optional automatic
>> tuner mode control for the E4000. If you also like using
>> Winrad/HDSDR/WRplus, my ExtIO
>> plugin<http://wiki.spench.net/wiki/USRP_Interfaces> now has support for
>> the device too. The Source block performs internal multi-threaded
>> buffering for smoother performance (this might be over-engineered, but it
>> seemed to help with the ExtIO plugin).
>> You can get the source code from my
>> SVN<http://svn.spench.net/main/gr-baz/> or
>> github<https://github.com/balint256/gr-baz> (though please visit the info
>> page<http://wiki.spench.net/wiki/Gr-baz#rtl_source_c> first for more
>> info/pre-reqs - e.g. libusb-1.0, etc). It's experimental, and not the
>> prettiest because I actually ported it back from the ExtIO plugin, but it
>> works for me and if you want to help test/clean it up then that would be
>> very much appreciated!
>> To see it in action, have a peek here: http://youtu.be/FUQd9HOVTk8
>> Balint @spenchdotnet<http://twitter.com/spenchdotnet>
>> _______________________________________________
>> Discuss-gnuradio mailing list
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