Hi all: My task is to use the USRP to down convert the GPS L1 channel to baseband signal. I have some problems with the carrier offset of the DBS_RX daughterboard. When I set f_l0 of the DBS_RX daughterboard to be 1575.42e6 which is the center frequency of GPS L1 signal, I found the real frequency in the tune(double _freq) function was 1575.5e6. So there is 80000 hz offset. I want to know what the output of DBSRX daughterboard is. What is the effect of this offset to my input signal?
Next, I need to down convert the output signal of the daughterboard. Fox example, I want to down convert it to 1.5M hz. Then, what should I do? I think I should use this function: usrp_standard_rx: set_rx_freq (int channel, double freq). What is the input value of freq? Any suggestions? Thanks a lot! -- Posted via http://www.ruby-forum.com/. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
