WBX + usrp_spectrum_sense.py


I’m working on USRP1 and WBX and I want to use usrp_spectrum_sense.py in
sensing the FM range (88M-108M) but the problem is that when i run the
code and print the m.data vector whether i connect the antenna or not
the results are almost the same, so i have some questions:

1)what is the tune delay/dwell delay compatible with WBX ?
2)what are other considerations should be taken into account (i.e any
parameters should be changed?..) to use this code with wbx?

Note:the problem is not in the antenna as i tried wbfm receiver and it
worked normally.