[Discuss-gnuradio] detect if certain channels are being used

Hi folks,

 

I want to accomplish the following with my usrp:

Receive from 1400 Mhz till 1500 Mhz and detect if there is activity (=signal, no matter what) on 1430, 1430 and 1490 Mhz

So i have to split the spectrum in 3 parts (= channels) and do a peak detection on each.

But how do i split the spectrum of my source?

 

kind regards

Guy