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

[Cheaw Wen Guey]

Thanks Josh.

Found that line of code.

Following your advice, I have tried both methods you mentioned and have
run into problems for both.

For the first one, I have followed the install instructions for microblaze
toolkit given on the gnuradio wiki and after setting the path, I tried to
configure. usrp2-firwmare failed and the reason that wwas showned was that
they failed to detect mb tools.

I then tried to install UHD and I managed to copy the firmware and FPGA
configuration into the card and I managed to verify by pinging the USRP2.
I am however unable to run any of the cpp files even as root as permission
is denied.

I am asking for help if there is anyone who has a modified binary firmware
file compiled for the gnuradio version that I can have. I also would like
to ask for help to compile a modified FPGA image.

Thanks
>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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Cheaw Wen Guey
Research Officer