[Discuss-gnuradio] in-band RX issues, higher freq?

[George Nychis]

Hi all,

While it seems as though I've solved the I&Q problem in the FPGA, the 
in-band code now seems to be receiving a different frequency than the 
standard code.  Here is captured data using the std and inband code of a 
10MHz sine wave, with the in-band capture being the top graph:
http://www.andrew.cmu.edu/user/gnychis/inband_std.png

To capture the standard output, I used:
./test_usrp_standard_rx -F 10000000 -o data

Their amplitudes seem to be exactly the same, but the in-band code seems 
to be capturing a higher frequency.  Can there be any other issue other 
than a daughterboard tuning problem?  I'm setting the frequency properly 
using set_rx_freq() with a mux of 0xf0f0f0f0.  The same transmitter is 
used to capture both sets of data.

Thanks!
George