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.html#setup-networking

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

-josh

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