Hi Ahsan, The signal does look good indeed. I'm guessing the problem is that nothing is output from the OFDM sym acquisition blocks (both from gr-dvbt and gr-isdbt?). In any case, are you sure about those transmission parameters? Did you check other CP lengths? gr-isdbt includes a small grc file to check both the transmission mode and CP which works both for ISDB-T and DVB-T (examples/obtaining_parameters.grc, please refer to the README or the issues section on the git). Maybe you could test that? best Federico
2015-12-17 7:51 GMT-03:00 Ron Economos <[email protected]>: > Marcus, > > That extremely low signal level is due to a Multiply Const block in the > flow graph set to 0.00055242272. In the gr-dtv in-tree version, I've > deleted that block. > > Ron > > On 12/17/2015 02:25 AM, Marcus Müller wrote: > > Can you crank up the USRP gain further? An average PSD value of 10^-14 > indicates there's still room for amplification, maybe. What Daughterboard > are you using? > Just out of interest, because improvised a ~760MHz monopole antenna not so > long ago: What kind of antenna are you using? > > Best regards, > Marcus > > On 17.12.2015 11:14, [email protected] wrote: > > Hello all, > Here are the USRP setting for my flowgraph > USRP N210 Settings > Sampling Rate: 10M > Center Frequency :746MHz > Gain:19 > The broadcast station has these parameters > Frequency:746MHz > Code rate : 2/3 > Guard interval : 1/4 > Transmission mode : 8k > I tried the vector to stream trick but doesnt works. Also I tried using > the OFDM synchronization block from gr-isdbt it also doesnt works. The > signal capture according to me is very good I have its screenshot > attached. Any other tips to get the flowgraph running? Thanks all > Cheers > Ahsan > > > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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