Re: [Discuss-gnuradio] Questions about transmit and receive with USRP N210 & GNU 3.6.5 use SBX dboard

[Derek Kozel]

Hello Ke,

No USRP can be controlled by more than one program at a time. Once a USRP has been claimed by a program others cannot access it. If you want to test both receive and transmit at the same time you will need to write your own program combining, for example, the benchmark programs, into one program using one multi-usrp object to access the USRP.

Regards,

Derek

On Wed, Feb 10, 2016 at 8:37 AM, kerry <address@hidden> wrote:

Hi,all:
I am trying to transmit something and receive it back using the same USRP
N210 device.
However it fails, or I did not do it correctly.

I run the receiver first use below command:

sudo ./benchmark_rx.py -f 2.45M

Then I run the transmitter use below command:

sudo ./benchmark_tx.py -f 2.45G

The transmitter back  "............................."

But the receiver gives me:
TIMEOUT

I changed the frequency also did not work.

What can cause this?
Is this a hardware problem?
I use SBX dboard. I think it can both receive and transmit at the same time.
Or maybe my incorrect operation？

Thanks，
Ke




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