I am trying to build a network analyzer using usrp and LF RX/TX- so i need
one TX and two RX-channels. However I only get noise lcose to zero on the
secon channel:
Here is what I am doing in the RX_path (in brief). Maybe somebody can spot
the mistake:
self.rx = usrp.source_c(0,decim_rate=128,
fpga_filename="std_2rxhb_2tx.rbf")
self.rx.set_nchannels(2)
self.di=gr.deinterleave(gr.sizeof_gr_complex)
self.dst_r = gr.file_sink(gr.sizeof_gr_complex, "test_r.dat")
self.dst_t = gr.file_sink(gr.sizeof_gr_complex, "test_t.dat")
self.rx_r_subdev = usrp.selected_subdev(self.rx, (0,0))
self.rx_r_subdev = usrp.selected_subdev(self.rx, (1,0))
self.rx.set_mux(gru.hexint(0xf0f0f0f0)) # expecting to get port A of
side A on both channels
rrx_r = self.rx.tune(0, self.rx_r_subdev, 10e6+1e3)
rrx_t = self.rx.tune(0, self.rx_t_subdev, 10e6+1e3)
self.head_r = gr.head(gr.sizeof_gr_complex, 1000)
self.head_t = gr.head(gr.sizeof_gr_complex, 1000)
self.connect(self.rx,self.di)
self.connect((self.di,0),self.head_r, self.dst_r)
self.connect((self.di,1),self.head_t, self.dst_t)
self.connect (self.siggen, self.tx)
I get nice data in test_r.dat but only noise close to zero in test_t.dat
--
View this message in context:
http://www.nabble.com/only-zeros-in-dual-channel-mode-tp14525372p14525372.html
Sent from the GnuRadio mailing list archive at Nabble.com.
_______________________________________________
Discuss-gnuradio mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
