Hi everybody, I'm trying to implement FM receiver on usrp e110. The daugtherboard used is SBX Board Rev 5.1. As a result, I got only noise, I wasn't able to hear the local station at 103.5 Mhz. And I got this error: *UHD Warning:* * The hardware does not support the requested RX frequency:* * Target frequency: 103.500000 MHz* * Actual frequency: 423.500000 MHz* *>>> gr_fir_ccf: using armv7_a* *>>> gr_fir_fff: using armv7_a* *aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUOaUaUaUOaUaUaUaUaUaUaUaUaUaUaUaUaUaU* I attached a screenshot of FM receiver 's GRC. Can you help me to detect if there are some parameters which are wrong ? Best regards, Wafa HAJ HMIDA

The SBX has a frequency range of 400MHz to 4.4GHZ which is why you cannot tune to broadcast FM stations between 88-108MHz: https://www.ettus.com/product/details/SBX Mike -- Mike Jameson M0MIK BSc MIET Email: mike@scanoo.com Web: http://scanoo.com On Thu, Jun 12, 2014 at 11:14 AM, Wafa Elhajhmida via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi everybody, > > I'm trying to implement FM receiver on usrp e110. The daugtherboard used > is SBX Board Rev 5.1. > > As a result, I got only noise, I wasn't able to hear the local station at > 103.5 Mhz. > > And I got this error: > *UHD Warning:* > * The hardware does not support the requested RX frequency:* > * Target frequency: 103.500000 MHz* > * Actual frequency: 423.500000 MHz* > *>>> gr_fir_ccf: using armv7_a* > *>>> gr_fir_fff: using armv7_a* > > *aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUOaUaUaUOaUaUaUaUaUaUaUaUaUaUaUaUaUaU* > > I attached a screenshot of FM receiver 's GRC. > > Can you help me to detect if there are some parameters which are wrong ? > > Best regards, > > Wafa HAJ HMIDA > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >

Thanks a lot for your reply. In fact, in order to respect the band range frequency of the SBX daughterboard Rev 5.1. I sent an FM signal from a signal generator called *NI PXIe-5673* described in this link: http://sine.ni.com/nips/cds/view/p/lang/en/nid/205593. The signal that I generated, it is a sinus and has *900* *MHz *frequency. So that I created my proper FM station on 900 MHz to respect the band range frequency allowed by SBX daughterboard Rev 5.1. In order to receive the signal generated by usrp e110, I implemented an FM receiver flow graph on usrp e110 which is attached below and I used an VERT900 Antenna, described in this link: https://www.ettus.com/product/details/VERT900 . But I still have noise generated by usrp e110. Have you an idea if there is a non suitable parameter on the flow graph ? Thanks in advance Best regards, Wafa HAJ HMIDA 2014-06-12 12:33 GMT+02:00 Mike Jameson <mike@scanoo.com>: > The SBX has a frequency range of 400MHz to 4.4GHZ which is why you cannot > tune to broadcast FM stations between 88-108MHz: > > https://www.ettus.com/product/details/SBX > > Mike > > -- > Mike Jameson M0MIK BSc MIET > Email: mike@scanoo.com > Web: http://scanoo.com > > > On Thu, Jun 12, 2014 at 11:14 AM, Wafa Elhajhmida via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> Hi everybody, >> >> I'm trying to implement FM receiver on usrp e110. The daugtherboard used >> is SBX Board Rev 5.1. >> >> As a result, I got only noise, I wasn't able to hear the local station at >> 103.5 Mhz. >> >> And I got this error: >> *UHD Warning:* >> * The hardware does not support the requested RX frequency:* >> * Target frequency: 103.500000 MHz* >> * Actual frequency: 423.500000 MHz* >> *>>> gr_fir_ccf: using armv7_a* >> *>>> gr_fir_fff: using armv7_a* >> >> *aUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUaUOaUaUaUOaUaUaUaUaUaUaUaUaUaUaUaUaUaU* >> >> I attached a screenshot of FM receiver 's GRC. >> >> Can you help me to detect if there are some parameters which are wrong ? >> >> Best regards, >> >> Wafa HAJ HMIDA >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> >> >