This plugin supports input from SDRplay devices. SDRplay is based on the MSi001 and MSi2500 chips from Mirics. The standard API provided by Mirics is closed source moreover it could not be implemented successfully in SDRangel. An open source API libmirisdr-2 has been written by Miroslav Slugen and later amended by Leif Asbrink SM5BSZ. This API uses a new flavour called [libmirisdr-4](https://github.com/f4exb/libmirisdr-4) in this very same Github space. It contains enhancements and bug fixes.
this plugin uses the libusbK USB interface provided by [Zadig](http://zadig.akeo.ie). It will not work with any of the other drivers provided by Zadig. It is also not compatible with the drivers from Mirics so you will have to unistall (or you should not install) the Mirics software before you can use this plugin.
Use it at your own risk! If the device disconnects you will immediately get a BSOD. In Linux it is just a core dump.
Also sometimes when loading a preset the device will not work correctly. In this case just use the stop/start toggle to reset the device.
As mentioned already the plugin depends on libmirisdr-4. You will have to compile it and install it in your system. When installed in non standard folders the include and library paths have to be specified on the cmake command line. Say if you install `libmirisdr-4` in `/opt/install/libmirisdr` you will have to add `-DLIBMIRISDR_INCLUDE_DIR=/opt/install/libmirisdr/include -DLIBMIRISDR_LIBRARIES=/opt/install/libmirisdr/lib/libmirisdr.so` on the cmake command line.
This is the correction in tenths of ppm steps. This is hardly useful with SDRplay as it has been found on spot. The MSi001 chip probably uses some sort of internal compensation. However this control is kept just in case.
Use this radiobutton to select a mode where the gain of the LNA (or mixer buffer below 50 MHz), mixer and baseband amplifiers are automatically selected depending on the tuner gain index (11). This index is the gain value in dB at the nominal gain of all amplifiers. This is not the exact gain at all frequencies because the LNA gain decreases significantly at higher frequencies.