Linux HamSoft Database

DescriptionLinrad is a powerful SDR program intended for weak signal. Developed under Linux, it's also available for Windows also by mingw.

Linrad can be used together with a wide range of hardware from the 2.4 kHz audio of an ordinary SSB transceiver to the 2 MHz bandwidth of a Perseus, RTL dongle, and more. Linrad has native support for many hardware. Some under Linux only and others under Windows only.

Linrad allows very fast response, less than 25 ms from antenna to loudspeaker which means it can be used for QSK. It has a sophisticated noise blanker and several other unique tools for interference fighting. It is possible to series connect several instances of Linrad via network and to send data to other applications via network, jack or sndaloop.

Linrad allows two RF channels which is very useful for adaptive polarization in EME but also for beam-forming on lower bands. Linrad can show correlation spectra (for sideband noise measurement) and S/N with low bandwidth for S and wide bandwidth for N which is useful for Y-factor determination. (To evaluate antenna temperature and LNA noise figure etc.)
There is much more.

Because of the flexibility Linrad has a steeper learning curve than conventional SDR packages. It is for experimenters and for operators who want to hear what is not possible with any other radio at the cost of some more operator effort. It is also a qualified test instrument.

Linrad was designed for svgalib and does not use a standard GUI. That makes it alien to Windows users and unfortunately to modern Linux users as well. The GUI is very CPU efficient and it is the same on all platforms. svgalib. X11 and Windows. (from 98 to 8)
Author1Leif Asbrink, SM5BSZ
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MaintainerLeif Asbrink, SM5BSZ
Last Updated2014-02-15
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