2008/3/30, Sl Peng <[EMAIL PROTECTED]>: > 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!
Hi, I think you might find this thread from the mailing list archive useful: http://lists.gnu.org/archive/html/discuss-gnuradio/2007-04/msg00105.html -- Trond Danielsen _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
