On Wed, Jun 2, 2010 at 3:54 PM, Sharif Shaher <ssha...@steelriver.com> wrote: > Hello, > > I am trying to tune the WBX to 60MHz, but everytime I do > I get an error. If I do it through usrp2_fft.py it says "Failed", > if I do it through my c++ code, I get the error > set_rx_center_freq(6e+07) failed.
According to the driver, located at gnuradio/usrp2/firmware/lib/db_wbxng.c, the minimum supported frequency is 68.75 MHz, which makes sense since the ADF4350 synthesizer used on the WBX board only is spec'ed to run down to 137.5 MHz (and the quad demod chip on the WBX divides this in half internally). That being said, these VCOs can typically be tuned lower in frequency (or higher) than the min/max frequency specs, but you'll likely see additional phase noise, and you'll be running outside the expected operating range of the chip, which is generally not ideal. But it can be done. -- John Orlando CEO/System Architect Epiq Solutions www.epiq-solutions.com _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
