Hello I am using a usrp1 populated with 2 LFRX and 2 LFTX daughter boards.
I want to use the 2 ADC of LFRX-A to sample s different signals. To do this I use set_subdev_spec("A:A B:A",0). In order to avoid a segmentation fault I apparently have to create the rx with num_channels=2. But now I get the error-message: RuntimeError: gr uhd usrp source(4): insufficient connected output ports (2 needed, 1 connected) My questions: 1) Is the num_channels argument to uhd.usrp_source specifying the number of active DDCs? 2) How do I connect more than 1 port to uhd.usrp_source? In pre-uhd this was achieved using gr.deinterleave - but this does not seem to work anymore. Here is the code: #!/usr/bin/python from gnuradio import gr from gnuradio import uhd from gnuradio.eng_option import eng_option class build_block(gr.top_block): def __init__(self): gr.top_block.__init__(self) self.u_tx = uhd.usrp_sink("serial=47432785",uhd.stream_args('fc32')) self.siggen_tx = gr.sig_source_c(self.u_tx.get_samp_rate(),gr.GR_CONST_WAVE,0, 1.0, 0) # self.head_tx = gr.head(gr.sizeof_gr_complex, 1000000) self.head_tx = gr.head(gr.sizeof_gr_complex, 1000) self.u_tx.set_subdev_spec("A:AB",0) self.u_tx.set_center_freq(10e6) self.u_tx.set_samp_rate(1e6) self.u_tx.get_samp_rate() # self.u_rx = uhd.usrp_source("serial=47432785",uhd.stream_args('fc32'),num_channels=1) self.u_rx = uhd.usrp_source("serial=47432785",io_type=uhd.io_type.COMPLEX_FLOAT32,num_channels=2) # self.u_rx.set_subdev_spec("A:A B:A",0) self.u_rx.set_subdev_spec("A:A B:A",0) self.u_rx.set_center_freq(10e6+1e3) self.u_rx.set_samp_rate(250e3) self.head_rx_0 = gr.head(gr.sizeof_gr_complex, 1000) self.dst0 = gr.file_sink(gr.sizeof_gr_complex, "r.dat") # self.di = gr.deinterleave(gr.sizeof_gr_complex) # self.connect (self.siggen_tx,self.head_tx, self.u_tx) self.connect (self.u_rx,self.head_rx_0,self.dst0) # self.connect (self.u_rx,self.di) tb = build_block () tb.run () Thanks Wolfgang _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio