Single daughterboard configuration

Hi

I have to know whether there is specific configuration required to run
usrp_fft script with a single doughterboard?

Because I get all the time the “failed to set initial frequency” error,
but in the same time I can start OpenBTS in “single daughterboard mode”
without error, which occurs if tune function fails. However, my mobile
phone cant catch the signal from OpenBTS in this set-up.

Thx