Forum: GNU Radio usrp spectrum sensing

Hello everyone,
  I am trying to sense atransmitted signal using a usrp. I typed the 
following command (/usrp_spectrum_sense.py 440M 450M --fft 512) and 
worked a couple of times. But when I try it today, it tells me that 
there is no device. (even though I connected a usrp). part of the 
message I get looks like this.

RuntimeError: LookupError: KeyError: No devices found for ----->

Empty Device Address


I need help please.
Biniyam.

On 02/08/2013 07:26 PM, Biniyam Zewede wrote:
> Empty Device Address
>
>
> I need help please. Biniyam.
>

need more information.


If this is a network device, you may not have setup your network 
interface.
http://files.ettus.com/uhd_docs/manual/html/usrp2....


If this is a usb device, you may not have setup udev/installed winusb
driver.
http://files.ettus.com/uhd_docs/manual/html/transp...


-josh