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149 lines
8.8 KiB
Markdown
149 lines
8.8 KiB
Markdown
===============
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RTL-SDRangelove
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===============
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======================
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Cloning the repository
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======================
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- Clone as usual
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- Checkout the f4exb branch: `git checkout f4exb`
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=======================
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GNURadio and libosmosdr
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=======================
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These plugins have a lot of bugs and they have been removed trom the build. Original sources still exist in the tree. So current version only supports the following hardware:
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- RTL-SDR
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- Funcube
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- BladeRF (standard and with XB-200 transverter)
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==============
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Funcube Dongle
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==============
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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.
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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.
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=======
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BladeRF
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=======
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A complete new plugin has been written for the BladeRF that interfaces libbladeRF directly. Osmosdr/GnuRadio interface is not implemented correctly and has a lot of bugs as mentioned previously and was not reasonably usable with the BladeRF.
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If you use your own location for libbladeRF install directory you need to specify library and include locations. Example with `opt/install/libbladerf` with the following defines on `cmake` command line:
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`-DLIBBLADERF_LIBRARIES=/opt/install/libbladeRF/lib/libbladeRF.so -DLIBBLADERF_INCLUDE_DIR=/opt/install/libbladeRF/include`
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==========
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For Ubuntu
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==========
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`sudo apt-get install libqt5multimedia5-plugins qtmultimedia5-dev qttools5-dev qttools5-dev-tools libqt5opengl5-dev qtbase5-dev libusb-1.0 librtlsdr-dev libboost-all-dev`
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`mkdir build && cd build && cmake ../ && make`
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`librtlsdr-dev` is in the `universe` repo. (utopic 14.10 amd64.)
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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`.
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The Gnuradio plugin source needs extra packages, including `liblog4cpp-dev libboost-system-dev gnuradio-dev libosmosdr-dev`
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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:
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- For GNU Radio runtime:
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- Includes: `-DGNURADIO_RUNTIME_INCLUDE_DIRS=/opt/install/gnuradio-3.7.5.1/include`
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- Library: `-DGNURADIO_RUNTIME_LIBRARIES=/opt/install/gnuradio-3.7.5.1/lib/libgnuradio-runtime.so`
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- For gr.osmocom:
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- Includes: `-DGNURADIO_OSMOSDR_INCLUDE_DIRS=/opt/install/gr-osmosdr/include`
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- Library: `-DGNURADIO_OSMOSDR_LIBRARIES=/opt/install/gr-osmosdr/lib/libgnuradio-osmosdr.so`
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- For RTL-SDR library:
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- Includes: `-DLIBRTLSDR_INCLUDE_DIR=/opt/install/rtlsdr/include`
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- Library: `-DLIBRTLSDR_LIBRARIES=/opt/install/rtlsdr/lib/librtlsdr.so`
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There is no installation procedure the executable is at the root of the build directory
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============
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For Debian 8
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============
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Debian 7 "wheezy" uses Qt4. Qt5 is available from the "wheezy-backports" repo, but this will remove Qt4. Debian 8 "jessie" uses Qt5.
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`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 libboost-all-dev`
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`mkdir build && cd build && cmake ../ && make`
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The same remarks as for Ubuntu apply...
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============
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Known Issues
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============
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- Actually NFM seems to be working pretty well
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- 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!
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- 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.
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- GNU Radio plugin is not fully functional and has serious bugs (frequent segfaults). Trying to repair it is abandonned.
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===================
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Done since the fork
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===================
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- Added ppm correction for the LO of RTL-SDR. This uses the corresponding function in the librtlsdr interface (range -99..99 ppm)
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- Added a preset update button (the diskette with the yellow corner) to be able to save the current settings on an existing preset
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- 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
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- Better handling of rtlsdr GUI display when settings change (initial load, load of presets)
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- Added display and precise control of the shift frequency from center frequency of the NFM receivers.
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- Removed useless spectrum visualizer in NFM receivers. Created a null sink class to fit corresponding parameter in NFMDemod class constructor.
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- Added display and precise control of the shift frequency from center frequency of the SSB receivers.
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- SSB filter bounds are tunable so that filter can be set off from center frequency allowing aural decoding of CW
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- Make the sidebands appear correctly on SSB channel overlay. Limit to +/- 6 kHz to fit channel spectrum analyzer window
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- SSB bandwidth can now be tuned in steps of 100 Hz
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- NFM and SSB receiver in focus trigger the display of the central frequency line on the spectrum frequency scale thus facilitating its identification
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- Added AM demod so now you can listen to air traffic!
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- Added the possibility to change the brightness and/or color of the grid.
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- Make the low cutoff frequency of the SSB filter variable so it can be used for CW also.
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- 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.
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- Added working WFM demodulation. Optimized for no atan2.
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- OsmoSDR and GNURadio plugins removed from the build as they have too many bugs that are too difficult to correct
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- New plugin for BladeRF interfacing libbladeRF directly
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- Corrected the nasty audio band resampling bug preventing use of sample rates that are not power of 2 multiples of 48kHz. This was because the resampling ratio was calculated with an integer division instead of a float division.
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- As a consequence of the above added more interesting values for the available sampling rates of the BladeRF plugin
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- Variable span for the SSB demod down to 1.5 kHz
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- Filter out CTCSS tones for audio and full CTCSS support in NFMDemod
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- Enhancement of the NFM squelch mimicking professional analog squelch circuits (based on balance between two AF filters)
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- Added a channel analyzer plugin focusing on measurement (DSA/DSO functionnality). Basic functions.
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- Added a scope widget in the channel analyzer plugin
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- Channel analyzer bandwidth up to half the available RF (IF) bandwidth (was 48k fixed)
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- Enhanced scope display and controls: scale display, better X (time) and Y scales control, grid fit to scale, effectively implementing triggers, trigger on magnitude and phase, properly handling time shift, ...
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- Enhanced spectrum display: Histogram: wider decay range, make stroke and late holdoff adjustable. Added option to show live spectrum (had only max hold before).
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- Enhanced channel analyzer: enhanced scope and spectrum displays as mentioned above, make the spectrum display synchronous to scope (hence triggerable a la E4406A).
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- Sort channel plugins by delta frequency and type before saving to preset
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- Implemented scope pre-trigger delay
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- Implemented variable scope memory depth
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- Implemented trigger delay
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- Trigger on both edges
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- Spectrum histogram clear
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- Trigger line display for all trigger modes
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- Coarse and fine trigger level sliders
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- Minimalist recording (no file choice)
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- File sample source plugin (recording reader) not working
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- Redesign:
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- Make the DSP engine global static
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- Fixed startup initialization sequence. New initialization phase in DSP engine and new ready state
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- Synchronous messaging class to push message to thread and wait for completion
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- Message queuing and handling redesign
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- Many other little things...
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=====
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To Do
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=====
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- Level calibration
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- Enhance presets management (Edit, Move, Import/Export from/to human readable format like JSON)
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- Tx channels for Rx/Tx boards like BladeRF
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- Enhance WFM (stereo, RDS?)
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- Even more demods ...
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