SDR

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Goal

  • Install an SDR reception station at FIXME based on rtl-sdr, a DVB-T USB Stick and a Raspberry Pi.

References

SDR at FIXME

We currently have two rtl_tcp instances running at FIXME:

  • sdr1.fixme.ch:1234 (62.220.135.211:1234) (Raspberry PI, west window, MC's homemade VHF antenna)
  • foo.fixme.ch:1234 (FIXME's internal server, north window, original UHF antenna)

Service

  • The service is started with the following command is listen to the port 1234
sv start rtl-tcp

SDR Softwares

GNURadio

 mkdir gnuradio; cd gnuradio
 wget http://www.sbrac.org/files/build-gnuradio; chmod a+x ./build-gnuradio; ./build-gnuradio
  • On Debian 7: apt-get install gnuradio (???)
  • On arch linux, a working package is in aur so you only need
 yaourt -S gnuradio
  • Install and use Multimode
 svn co https://www.cgran.org/svn/projects/multimode/trunk/ gnuradio-multimode
 git clone git://git.osmocom.org/osmo-sdr.git
 ./multimode.py --devinfo=rtl_tcp=foo.fixme.ch:1234 --freq=98.5M --dmode=WFM --mthresh=-35 --vol=10

RTL-SDR

Requirement

sudo apt-get install git
sudo apt-get install libusb-1.0-0-dev
sudo apt-get install cmake
sudo apt-get install build-essential

Build

git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr/
mkdir build
cd build
cmake ../ -DDETACH_KERNEL_DRIVER=ON -DINSTALL_UDEV_RULES=ON
make
sudo make install
sudo ldconfig
sudo cp rtl-sdr.rules /etc/udev/rules.d/

Test the dongle

The test bellow is for a E4000 dongle. 

sdr@alix2:~$ rtl_test -t
Found 1 device(s):
  0:  Terratec T Stick PLUS

Using device 0: Terratec T Stick PLUS
Found Elonics E4000 tuner
Supported gain values (14): -1.0 1.5 4.0 6.5 9.0 11.5 14.0 16.5 19.0 21.5 24.0 29.0 34.0 42.0 
Benchmarking E4000 PLL...
[E4K] PLL not locked for 52000000 Hz!
[E4K] PLL not locked for 2225000000 Hz!
[E4K] PLL not locked for 1113000000 Hz!
[E4K] PLL not locked for 1251000000 Hz!
E4K range: 53 to 2224 MHz
E4K L-band gap: 1113 to 1251 MHz

Use rtl_tcp

To start rtl_tcp on every ethernet interfaces and the port 1234: 

pi@sdr1 ~ $ rtl_tcp -a 0.0.0.0 p 1234
Found 1 device(s).
Found Fitipower FC0013 tuner
Using Terratec NOXON DAB/DAB+ USB dongle (rev 1)
Tuned to 100000000 Hz.
listening...
Use the device argument 'rtl_tcp=0.0.0.0:1234' in OsmoSDR (gr-osmosdr) source
to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...).


SDR#

  • Replace $ARCH by i386 or x86_64
ARCH='x86_64'
sudo apt-get install mono-complete monodevelop
sudo apt-get install libportaudio2 
sudo apt-get install subversion
svn co https://subversion.assembla.com/svn/sdrsharp/trunk sdrsharp
cd sdrsharp
xbuild /t:Rebuild /p:Configuration=Release SDRSharp.sln /p:Platform=x86
cd Release
sudo ln -s /usr/local/lib/librtlsdr.so librtlsdr.dll
sudo ln -s /usr/lib/$ARCH-linux-gnu/libportaudio.so.2 libportaudio.so
mono SDRSharp.exe


To prevent the error below, just modify the file release/SDRSharp.exe.config and comment the line as follow: 

<!-- <add key="SDR-IQ" value="SDRSharp.SDRIQ.SdrIqIO,SDRSharp.SDRIQ" /> -->^M

Sdsharp error.jpg Sdsharp.jpg

References


Multimon-NG

Requirement

sudo apt-get install libqt4-dev
sudo apt-get install libpulse-dev

Build

git clone https://github.com/EliasOenal/multimonNG.git
cd multimonNG
mkdir build
cd build
qmake ../multimon-ng.pro
make
sudo make install

On arch linux, you have the choice between a "stable" version named multimon: 

  yaourt -S multimon

and The dev version: 

  yaourt -S multimon-ng-git

ACARS

Aircraft Communication Addressing and Reporting System [1]

Requirement

sudo apt-get install libsndfile1-dev
sudo apt-get install libasound2-dev

Installation

  1. Download software ACARS decoder from [2]
wget http://sourceforge.net/projects/acarsdec/files/latest/download
tar xvzf download
cd acarsdec-3.0/
make

Test

./acarsdec -o1 -f test.wav
#2 (E:0)  .PH-BXR KL1681 E 5V S53A 
#4 (E:0)  .LN-DYY DY083J 2 Q0 S46A 
#2 (E:0)  .LN-DYY DY083J E Q0 S47A 
#1 (E:0)  .F-GTAE AF7728 G H1 D65C #DFB00000/V206,05,124,183,02,
#1 (E:0)  .LN-DYY        x _d      
#3 (E:0)  .G-DBCK BA031T 2 _d S64A 
#3 (E:0)  .G-DBCK BA031T E Q0 S63A

Usage

echo ./acarsdec -p -8 -r 0 131.525 131.550 131.725 131.825 >> message-acars.txt & > run-acars
chmod u+rwx run-acars
./run-acars
tail -f message-acars.txt

Gqrx (Mac)

Installation

  1. Download software from here
  2. Open .dmg file, you can run the app directly from the image, or copy it into Applications folder

Usage

  1. Select RTL-SDR Spectrum server
  2. Use device string 
    rtl_tcp=sdr1.fixme.ch:1234
  3. Choose your other settings (default works fine), click Ok
  4. Click on Power button to start listening
  5. Move around spectrum by clicking on it, or by clicking/right clicking on the frequency numbers

Participants

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