SDR

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

Quisk

http://james.ahlstrom.name/quisk/

GNURadio

GNURadio multimode
Install on Debian 6

 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

Debian Packages

apt intsall rtl-sdr

Sources

Requirement

sudo apt-get install git libusb-1.0-0-dev cmake 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
cd ..
sudo cp rtl-sdr.rules /etc/udev/rules.d/

Test the dongle

The test bellow is for a E4000 dongle.

$ 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

or for other dongle

$ rtl_test 
Found 1 device(s):
  0:  NOXON, DAB Stick, SN: 0

Using device 0: Terratec Fraunhofer DAB Stick
Found Fitipower FC0013 tuner
Supported gain values (23): -9.9 -7.3 -6.5 -6.3 -6.0 -5.8 -5.4 5.8 6.1 6.3 6.5 6.7 6.8 7.0 7.1 17.9 18.1 18.2 18.4 18.6 18.8 19.1 19.7 
Sampling at 2048000 S/s.

Info: This tool will continuously read from the device, and report if
samples get lost. If you observe no further output, everything is fine.

Reading samples in async mode...

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, ...).

Calibration

Pour utiliser la grande partie des logiciel SDR il faut faire une calibration

Requirement

sudo apt-get install libtool autoconf automake libfftw3-dev

Installation

git clone https://github.com/steve-m/kalibrate-rtl.git
cd kalibrate-rtl/
./bootstrap
./configure
make
sudo make install

You may need to run this if you encounter some reference errors on Raspberry Pi:

export PKG_CONFIG_PATH='/usr/lib/arm-linux-gnueabihf/pkgconfig/'

Usage

On utilise les fréquences du GSM-900

# kal -e 22 -s 900
Found 1 device(s):
  0:  Generic RTL2832U OEM

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Exact sample rate is: 270833.002142 Hz
kal: Scanning for GSM-900 base stations.
GSM-900:
        chan: 9 (936.8MHz + 22.294kHz)  power: 52744.70
        chan: 11 (937.2MHz + 22.198kHz) power: 148897.40
        chan: 48 (944.6MHz + 21.298kHz) power: 64839.80
        chan: 50 (945.0MHz + 21.360kHz) power: 76421.47
        chan: 66 (948.2MHz + 21.020kHz) power: 100342.53
        chan: 68 (948.6MHz + 21.109kHz) power: 148650.05
        chan: 74 (949.8MHz + 21.369kHz) power: 57399.97

# kal -e 22 -c 80 -v
Found 1 device(s):
  0:  Generic RTL2832U OEM

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
Exact sample rate is: 270833.002142 Hz
kal: Calculating clock frequency offset.

SDR#

The project has been closed sourced !
~~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:

^M

References

http://www.rtlsdr.org/softwarelinux

Multimon-NG

Requirement

sudo apt-get install libqt4-dev 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 libasound2-dev

Installation

Download software ACARS decoder from [2]

git clone https://github.com/TLeconte/acarsdec.git
cd acarsdec/

Modifier l'entête du fichier Makefile

# See README for compiler options
#CFLAGS= -Ofast  -pthread -D WITH_RTL -D WITH_ALSA -D WITH_SNDFILE
#LDLIBS= -lm -pthread  -lrtlsdr -lasound -lsndfile

# Airspy conf
# CFLAGS= -Ofast -pthread -D WITH_AIR -I.  `pkg-config --cflags libairspy`
# LDLIBS= -lm -pthread  `pkg-config --libs libairspy` -lusb-1.0

# RTL only conf
CFLAGS= -Ofast -pthread -D WITH_RTL -I.
LDLIBS= -lm -pthread   -lrtlsdr

Lancer la command make

Usage

vi run-acars

# add line : 
./acarsdec -o 2 -l message-acars.txt -r 0 131.525 131.550 131.725 131.825 &

chmod u+rwx run-acars
./run-acars
tail -f message-acars.txt

Gqrx

Installation (Linux)

Debian:

apt-get install gqrx-sdr

Installation (Mac)

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

Usage

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

Participants

Resources

RTL-SDR Calibration

https://karelkeers.nl/karelkeers.nl/rtl-sdr-calibration-with-r820t2-chip/

Antenna Setup

https://www.rtl-sdr.com/using-our-new-dipole-antenna-kit/ https://www.qsl.net/kk4obi/

SDR

Contents

Goal

References

SDR at FIXME

Service

SDR Softwares

Quisk

GNURadio

RTL-SDR

Debian Packages

Sources

Requirement

Build

Test the dongle

Use rtl_tcp

Calibration

Requirement

Installation

Usage

SDR#

References

Multimon-NG

Requirement

Build

ACARS

Requirement

Installation

Usage

Gqrx

Installation (Linux)

Installation (Mac)

Usage

Participants

Resources

RTL-SDR Calibration

Antenna Setup

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