> >>>>Please try the following command with non-UHD for comparison: > >>>> > >>>>usrp_siggen_gui.py -x 250k -i 64 --tx-gain=25 -A 1.0 -f 1.3G > >>>> > >>>>You should see about 50mW (17dBm) at 1.30025GHz > >>>> > >>>>If you change the final argument to 100M you should see around > >>>>80-100mW (19-20dBm) in the tone at 100.25MHz > >>>> > >>>>If you can confirm those numbers, perhaps we have a constant scalar > >>>>missing in either your flowgraph or the UHD code someplace. > >>>> > >>>>Thanks > >>>>Jason > > Hi Jason, > > I got the test done this morning (after I re-installed gnuradio 3.2.2 ) > > Using > > usrp_siggen_gui.py -x 250k -i 16 --gain=25 -a 1.0 -f 1.3G > > 60mW @ 1.3 GHz > 126mW @ 100 MHz > > Using my code and UHD (my code modified to write I = 0x7FFF, Q = 0x7FFF) > > 14.4mW @ 1.3 GHz > 33.8 mW @ 100 MHz > > Using my code and UHD ( my code modified to write I = 0x7FFF, Q = 0x0) > > 14.8mW @ 1.3 GHz > 24.8 mW @ 100 MHz > > I ran the power meter's self calibration routine before taking the > measurements > this time and applied the correct frequency correction. > > Looks like we have a bit missing :-( > > - Charles > > http://www.g4guo.blogspot.com/
Does your code set the transmit gain on the WBX? Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
