Hi - I've been setting up a system to measure noise figures of SDRs in real time, an extension of some similat tests we performed a few years ago:
I'm getting a NF of 7-8dB for a new Airspy R2 and Airspy mini. The spec quotes 3.6dB. Has anyone else measured the NF?
I note the 3.6dB figure is exactly the same as the front end tuner R820 tuner. However a system noise figure will always be poorer than the front end device.