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Readme.md
====================== Cloning the repository
- Clone as usual
- Checkout the f4exb branch:
git checkout f4exb
============== Funcube Dongle
Funcube Dongle Pro+ support will need "libasound2-dev" installed. ("libhid" is built from source). Install the rules file "fcdpp.rules" in "/etc/udev/rules.d" to gain the "root access" needed to control the dongle.
Funcube Dongle Pro+ USB drivers are broken on some hardware with recent kernels. It works well for me with an Atom Chipset, which has Full Speed USB ports, or a "Valleyview" Chromebook (kernel 3.10). A Desktop with the "same" chipset needs kernel 3.2, available with Debian 7 "wheezy". YMMV.
======= BladeRF
You need a very recent (May 2015) version of gr-osmosdr. 0.1.1 does not work but 0.1.5 does. Check to which library points the symbolic link libgnuradio-osmosdr.so
. It should be something like: libgnuradio-osmosdr-0.1.5git.so.0.0.
========== For Ubuntu
sudo apt-get install libqt5multimedia5-plugins qtmultimedia5-dev qttools5-dev qttools5-dev-tools libqt5opengl5-dev qtbase5-dev libusb-1.0 librtlsdr-dev
mkdir build && cd build && cmake ../ && make
librtlsdr-dev
is in the universe
repo. (utopic 14.10 amd64.)
Use cmake ../ -DV4L-RTL=ON
to build the Linux kernel driver for RTL-SDR (Experimental). Needs a recent kernel and libv4l2. Will need extra work to support SDRPlay. Needs cp KERNEL_SOURCE/include/linux/compiler.h /usr/include/linux/
and cp KERNEL_SOURCE/include/uapi/linux/videodev2.h /usr/include/uapi/linux/
and package libv4l-dev
.
The Gnuradio plugin source needs extra packages, including liblog4cpp-dev libboost-system-dev gnuradio-dev libosmosdr-dev
For non standard installations of RTL-SDR library, the GNU Radio runtime and gr.osmocom drivers use the following variables in the cmake command line. The paths specified are just examples:
- For GNU Radio runtime:
- Includes:
-DGNURADIO_RUNTIME_INCLUDE_DIRS=/opt/install/gnuradio-3.7.5.1/include
- Library:
-DGNURADIO_RUNTIME_LIBRARIES=/opt/install/gnuradio-3.7.5.1/lib/libgnuradio-runtime.so
- Includes:
- For gr.osmocom:
- Includes:
-DGNURADIO_OSMOSDR_INCLUDE_DIRS=/opt/install/gr-osmosdr/include
- Library:
-DGNURADIO_OSMOSDR_LIBRARIES=/opt/install/gr-osmosdr/lib/libgnuradio-osmosdr.so
- Includes:
- For RTL-SDR library:
- Includes:
-DLIBRTLSDR_INCLUDE_DIR=/opt/install/rtlsdr/include
- Library:
-DLIBRTLSDR_LIBRARIES=/opt/install/rtlsdr/lib/librtlsdr.so
- Includes:
There is no installation procedure the executable is at the root of the build directory
============ For Debian 8
Debian 7 "wheezy" uses Qt4. Qt5 is available from the "wheezy-backports" repo, but this will remove Qt4. Debian 8 "jessie" uses Qt5.
sudo apt-get install cmake g++ pkg-config libfftw3-dev libusb-1.0-0-dev libusb-dev qt5-default qtbase5-dev qtchooser libqt5multimedia5-plugins qtmultimedia5-dev qttools5-dev qttools5-dev-tools libqt5opengl5-dev qtbase5-dev librtlsdr-dev
mkdir build && cd build && cmake ../ && make
The same remarks as for Ubuntu apply...
============ Known Issues
- Actually NFM seems to be working pretty well
- Does not work properly for RTL-SDR sampling rates not multiple of AF sampling rate (48000 Hz). This is because the interpolator/decimator is not a rational resampler actually (just does one or the other). For now please use 288, 1152 or 1536 kHz sampling rates,
- RTL frontend will have bad aliasing in noisy environments. Considering the size of the hardware there is no place for proper filters. With good filtering and a good antenna up front these devices work remarkably well for the price!
- Aliasing can be annoying for broadcast FM. In this case try to shift the signal until you find a clear background for your station. This is a limitation of the RTL hardware so just use this workaround.
- GNU Radio plugin is still not fully functional:
- Current settings are not saved and retrieved on the next session
- DC offset and I/Q policy is not working properly and has been disabled (effectively enforces the "keep" mode always)
=================== Done since the fork
- Added ppm correction for the LO of RTL-SDR. This uses the corresponding function in the librtlsdr interface (range -99..99 ppm)
- Added a preset update button (the diskette with the yellow corner) to be able to save the current settings on an existing preset
- Added variable decimation in log2 increments from 2^0=1 to 2^4=16 allowing to see the full 2048 kHz of spectrum if so you wish
- Better handling of rtlsdr GUI display when settings change (initial load, load of presets)
- Added display and precise control of the shift frequency from center frequency of the NFM receivers.
- Removed useless spectrum visualizer in NFM receivers. Created a null sink class to fit corresponding parameter in NFMDemod class constructor.
- Added display and precise control of the shift frequency from center frequency of the SSB receivers.
- Make the sidebands appear correctly on SSB channel overlay. Limit to +/- 6 kHz to fit channel spectrum analyzer window
- SSB bandwidth can now be tuned in steps of 100 Hz
- NFM and SSB receiver in focus trigger the display of the central frequency line on the spectrum frequency scale thus facilitating its identification
- Added AM demod so now you can listen to air traffic!
- Added the possibility to change the brightness and/or color of the grid.
- Make the low cutoff frequency of the SSB filter variable so it can be used for CW also.
- NFM demodulation without using atan and smooth squelch with AGC suppressing most clicks on low level signals and hiss on carrier tails. Only useful modulation comes through.
- Added working WFM demodulation. Optimized for no atan2.
- Improved GNU Radio plugin usability with most settings saved on a preset
===== To Do
- Enhance WFM (stereo, RDS?)
- Make the the SSB filter frequency bounds tunable so that it can be used for CW. Change marker overlay accordingly.
- Possibility to completely undock the receiver in a separate window. Useful when there are many receivers
- Larger decimation capability for narrowband and very narrowband work (32, 64, ...)
- Even more demods ...
- Triggering capability like on expensive spectrum analyzers to trap burst signals
- recording capability