Airspy R2, Airspy Mini and Airspy HF+ have native drivers. Like the RTL-SDR and HackRF in 0.91.0, FoxSDR drives them itself over WinUSB, with no libairspy, no libusb and no SoapySDR module: bind the radio to WinUSB with Zadig once and it appears in the Source list. The R2/Mini driver reads the radio's own rate list from its firmware, converts its real 12-bit stream to I/Q with libairspy's own filter so signals sit where every other Airspy application puts them, and exposes LNA, MIXER, VGA and the LINEARITY and SENSITIVITY walks. The HF+ driver includes the IQ balancer, measured taking a damaged tone's image from 31 dB down to 77 dB down. An Airspy you had saved through SoapySDR opens natively by itself on the next start.
A bias-tee control. In the Source section for the HackRF and the Airspys, remembered between sessions and switched off whenever the radio is closed.
Gains read in the unit they really have. An Airspy's LNA, MIXER and VGA are register steps, not decibels, and now say so; every other radio still reads in dB.
Neither Airspy has met real hardware here; both drivers are proven against the reference protocol. Reports from those radios will be read closely.
SHA-256 of foxsdr-setup-0.92.0.exe:
db2a91676cdc6b7c3db02ad9b97c1977b2df8fc2f5fd903443eb1e2dedbca288