using rtl_airband or CubicSDR mostly when i startup my Airspy R2 i see a really poor noise floor, have to stop /start a few times to get it where it should be.
i don't see this on my SDRPlay rsp2 or rsp1a or my rtl-sdr dongles so i think this is airspy specific.
lee@probook:~$ SoapySDRUtil --info
## Soapy SDR -- the SDR abstraction library
ABI Version: v0.7
Install root: /usr
Search path: /usr/lib/SoapySDR/modules0.7
Search path: /usr/local/lib/SoapySDR/modules0.7
Module found: /usr/lib/SoapySDR/modules0.7/libairspySupport.so (0.1.2-e69ba77)
Module found: /usr/lib/SoapySDR/modules0.7/libremoteSupport.so (0.4.3-b6819ea)
Module found: /usr/lib/SoapySDR/modules0.7/librtlsdrSupport.so (0.2.4-5d49f03)
Module found: /usr/lib/SoapySDR/modules0.7/libsdrPlaySupport.so (0.1.0-3745fea)
Available factories... airspy, remote, rtlsdr, sdrplay
Available converters...
- CF32 -> [CF32, CS16, CS8, CU16, CU8]
- CS16 -> [CF32, CS16, CS8, CU16, CU8]
- CS32 -> [CS32]
- CS8 -> [CF32, CS16, CS8, CU16, CU8]
- CU16 -> [CF32, CS16, CS8]
- CU8 -> [CF32, CS16, CS8]
- F32 -> [F32, S16, S8, U16, U8]
- S16 -> [F32, S16, S8, U16, U8]
- S32 -> [S32]
- S8 -> [F32, S16, S8, U16, U8]
- U16 -> [F32, S16, S8]
- U8 -> [F32, S16, S8]