[Discuss-gnuradio] Problems with 2 RX

[Albert Rodriguez]

Hi everyone!
We're trying to receive two signals from two different RFX2400 in the
same USRP. We've already read everything about setting the rx mux and
the n_channels. However, we still cannot receive the two signals
correctly.
When we put signal in the first Rx1 (that goes to one RFX2400), we can
see it, but we cannot see the other in Rx2 (to the other RFX2400),
it's like it hasn't any kind of input signal. I add the code. We don't
know if it's a problem of the deinterleave, or the mux. Thanks in
advance

class my_graph(stdgui.gui_flow_graph):

   def __init__(self,frame,panel,vbox,argv):
        stdgui.gui_flow_graph.__init__ (self,frame,panel,vbox,argv)

        sample_rate = 320000
        freq = 2450000000                               
        usrp_decim = 200
        decim = 10
#USRP
        src = usrp.source_c(0, usrp_decim, fpga_filename="std_2rxhb_2tx.rbf")
        src.set_mux(gru.hexint(0x32103210))
        src.set_nchannels(2)    
        subdev_spec1 = (0,0)
        subdev_spec2 = (1,0)
        subdev1 = usrp.selected_subdev(src, subdev_spec1)
        subdev2 = usrp.selected_subdev(src, subdev_spec2)
        subdev1.set_auto_tr(True)
        subdev2.set_auto_tr(True)       
        subdev1.select_rx_antenna('RX2')        
        subdev2.select_rx_antenna('RX2')        
        r=src.tune(0,subdev1,freq)
        r=src.tune(0,subdev2,freq)
        self.fft_1=fftsink.fft_sink_c(self,panel,0,10,50,sample_rate,512,2)
        self.fft_2=fftsink.fft_sink_c(self,panel,0,10,50,sample_rate,512,2)
        di=gr.deinterleave(gr.sizeof_gr_complex)
        fg = gr.flow_graph ()
        
        self.connect (src,di)
        self.connect ((di,0),self.fft_1)
        self.connect ((di,1),self.fft_2)
        self._build_gui(vbox)

   def _build_gui(self, vbox):

        vbox.Add(self.fft_1.win, 10, wx.EXPAND) 
        vbox.Add(self.fft_2.win, 10, wx.EXPAND)         

if __name__ == '__main__':
   app = stdgui.stdapp (my_graph, " ")
   app.MainLoop ()