Re: [Discuss-gnuradio] USRP2 missing Quadrature samples

[Leslie Choong]

Thanks for the replies.

I have checked the Quadrature values and they are indeed 0.0

I had already followed the steps to flash the SD card (using the one
that came with the USRP2) and used the firmware (txrx.bin) that
gnuradio (rev 10306) produced using make. I used the latest
u2_rev3.bin (dated Dec 31) that is sitting in
http://gnuradio.org/releases/usrp2-bin/trunk/

Just to check I redid the whole process of flashing and retried my
tests and had the same results.

Should I suspect my svn revision and update to the latest? I'll try
that for now, but if anyone has suggestions I'm all ears :) Thanks for
the help so far!

-Leslie




On Fri, Jan 30, 2009 at 12:26 PM, Michael Ossmann <address@hidden> wrote:
> On Fri, Jan 30, 2009 at 11:30:40AM -0800, Leslie Choong wrote:
>>
>> 2. More importantly, I am not seeing any quadrature component in the
>> IQ-plot (besides the noise at the beginning).
>
> I had this problem or one very similar when I had upgraded the
> firmware on the SD card without upgrading the FPGA build on the
> card.  See:
>
> http://gnuradio.org/trac/wiki/USRP2UserFAQ
>