Hi Nanak - I am having a very similar problem with the sBitx_v2. I can see some noise in the waterfall display if I raise the rf gain but no stations at all. Even very strong ones.
The noise level doesn't even raise or fall if I plug or unplug the antenna. So far I haven't found a solution. Let us know if you find something. Maybe it's related to my problem.
73
Stefan Beck