tom_wgs wrote: > > > > tom_wgs wrote: >> >> Hi all >> ... >> .. >> Thank you for your time and any help would be very much appreciated. >> Tom >> > > I have attached a couple additional plots showing the results of taking > 128 complex points at 500 kHz sampling rate from channel 2, and dividing > it (complex) by the same number of complex points from channel 1 > (element-by-element division, or complex mixing). > > .... > ... > . > > http://old.nabble.com/file/p30202507/Time%2BDomain%2BFreq%2B%2526%2Bother%2Berrors.jpg > > > http://old.nabble.com/file/p30202507/RXA_norm_RXB_Time_Domain.jpg > >
I found a partial solution but am not sure why and if my problem is completely fixed. I found that the Charge pump setting (_set_cp(int) was being set to 2 different values at 1880mHz for the 2 receivers. After experimenting the best results come when forcing the values both to 1 for all tested frequencies. The results can be seen below. Compare this to the results previous provided above. Can anyone provide some information on the charge pump and how the settings effect the receiver. Thanks. Some results at 1880 mHz. http://old.nabble.com/file/p30208676/1880_cp-1_test-2.jpg http://old.nabble.com/file/p30208676/hw238_1880_cp-1_test-1.jpg Results at 826 mHz http://old.nabble.com/file/p30208676/826.1_cp-1_test-2.jpg -- View this message in context: http://old.nabble.com/DBSRX-coherent-problem-%28Phase-Noise%29-tp30200932p30208676.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
