I've got my both 0.5ppm RTL-SDR dongles from China but compared to my AirSpy they seem to be quite insensitive. When I turn my LNB power on/off (or when I unplug the AirSpy) I see a huge noise floor coming up. Nothing like that with the new RTL-SDR's.. also the EB is much weaker.. I think there is some 20dB or so missing? Or do I miss a gain setting somewhere in the RTL-SDR configuration?