Hello Ayaz, Because you have hardware in your flowgraph (the B210) you should not include a throttle block. Check your log output, it is very likely that UHD is reporting underflows. I'd recommend quickly running through the GNU Radio tutorial on using hardware. https://wiki.gnuradio.org/index.php/Guided_Tutorial_Hardware_Considerations
Also the UHD manual has some general guidance which will help you to understand UHD's messages. http://files.ettus.com/manual/page_general.html Regards, Derek On Mon, Jun 11, 2018 at 8:26 PM, Ayaz Mahmud via USRP-users < [email protected]> wrote: > Hi, > > > > GNU Radio version 3.7.11 > > USRP B210 with 1 x 2.4GHz antenna > > Spectrum Analyzer with 2.4 GHz antenna > > I am trying to transmit the below flowgraph through USRP and receive a > signal with Spectrum Analyzer. Though the Spectrum analyzer will not be > able to demodulate it should show a stable frequency. Unfortunately, the > spectrum analyzer does not pick any signal while calibrated at Center Freq: > 2.412 GHz. > > GNU-Radio console warning: > > gr::log :WARN: ofdm_mapper_bcv0 - The gr::digital::ofdm_mapper_bcv block has > been deprecated. > > gr::log :WARN: ofdm_insert_preamble0 - The gr::digital::ofdm_insert_preamble > block has been deprecated. > > > > > GNU Radio version 3.7.11 > > USRP B210 with 1 x 2.4GHz antenna > > Spectrum Analyzer with 2.4 GHz antenna > > Block diagram attached. > > I am trying to transmit the below flowgraph through USRP and receive a > signal with Spectrum Analyzer. Though the Spectrum analyzer will not be > able to demodulate it should show a stable frequency. Unfortunately, the > spectrum analyzer does not pick any signal while calibrated at Center Freq: > 2.412 GHz. > > GNU-Radio console warning: > > gr::log :WARN: ofdm_mapper_bcv0 - The gr::digital::ofdm_mapper_bcv block has > been deprecated. > > gr::log :WARN: ofdm_insert_preamble0 - The gr::digital::ofdm_insert_preamble > block has been deprecated. > > > > Where can this possibly go wrong? > > > > > > > > Thanks, > > Ayaz > > > > _______________________________________________ > USRP-users mailing list > [email protected] > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >
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