Re: [Discuss-gnuradio] USRP2 unable to receive signal at RX-B

[Josh Blum]

I believe that the gnuradio usrp2 driver defaults to using only RXA for 
the BasicRX board. This can be changed by modifying this value in 
firmware for lib/db_basic.c to be "true" for the following line: 
.base.is_quadrature = false,

As an alternative, I recommend trying the UHD: 
http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki The 
basic board defaults to using both RXA and RXB, and the selection is 
software configurable.

-Josh

On 08/26/2010 03:48 AM, Cheaw Wen Guey wrote:
> Hi all,
>
> I started testing my USRP2 at a lower frequency. I have a function
> generator generate a 10MHz sine wave on RX-A and RX-B.
>
> However, I am unable to see the signal when I run usrp2_fft.py. To
> confirm, I disconnected the signal from RX-A and still nothing. I can only
> trace the signal as far as the signal transformer as the ADC is under the
> Basic-RX board.
>
> Is the USRP2 only able to receive on RX-A or is the board defective?
>
> Thanks in advance.
>
> Cheaw Wen Guey
> Research Officer
>
>
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