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Readme.md
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Readme.md
@ -183,77 +183,13 @@ Note for udev rules: the same as for openSUSE and Fedora applies.
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- Tabbed panels showing "X0" refer to the only one selected device it is meant to be populated by more tabs when it will support more than one device possibly Rx + Tx.
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<h1>Changes from SDRangelove</h1>
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<h1>Features</h1>
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<h2>New features, enhancements and fixes</h2>
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<h2>Changes from SDRangelove</h2>
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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)
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- Scope: trace history
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- Scope: trigger countdown
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- Scope: multiple trigger chaining
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- Scope: new mode with linear IQ (two traces) on the primary display and polar IQ on the secondary display
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- New USB source plugin to connect to an external demodulator (ex: GNU radio) via USB ports
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- Binaural option for SSB demod
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- DSB option for SSB
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- Mute option for NFM channel
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- New Broadcast FM demodulator with stereo support
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- RDS support in Broadcast FM demodulator
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<h2>Major redesign</h2>
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See the v1.0.1 first official relase [release notes](https://github.com/f4exb/sdrangel/releases/tag/v1.0.1)
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- Make the DSP engine global static simplifying access to it. Have a distinct object to handle the thread
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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 relieving the message queuing mechanism from this role
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- Message queuing and handling redesign. Still not completely satisfactory
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- Objects have their own input and output message queues
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- Dedicated message queue to communicate to the GUI for objects coupled with a GUI
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- Optimizations with Valgrind cachegrind
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- Corrected decimators bit shifting so that the number of effective output bits is constant and fill the internal sample width
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- Separate library to support all flavours of FunCube dongles. Rewritten FCD plugins.
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- Allow several sample source plugins to share the same presets for what is common
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- Prepare grounds for future Tx operations with Tx spectrum display in the main window
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- Merged include-gpl into include and removed GPL dribble in About dialog
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- Many other little things...
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<h1>To Do</h1>
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<h2>To Do</h2>
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- Allow the handling of more than one device at the same time. For Rx/Tx devices like the BladeRF Rx and Tx appear as two logical devices with two plugin instances and a common handler for the physical device services both plugins. This effectively opens Tx support.
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- Tx channels
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- Possibility to connect channels for example Rx to Tx or single Rx channel to dual Rx channel supporting MI(MO) features like 360 degree polarization detection.
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@ -313,3 +249,4 @@ The `plugins` subdirectory contains the associated plugins used to manage device
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<td><i>channelsink</i></td>
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</tr>
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</table>
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