I recently use GRC and USRP to do some experiment. But there is a problem for me.
I use signal_source->packet_encoder->Gmsk_mod->usrp_sink in the transmit side.and it the receive side I use usrp_source->Gmsk_demod->packet_decoder->scope_sink.Now I know I can see the modulationed waveform in the scope_sink which is connected to the usrp_source. But I can not see anything in the last scope_sink. The correlative parameters which I set about the usrp_sink and usrp_source are the same as the defulat value in the benchmark_tx.py and benchmark_rx.py.and the other parameter in the other block is the defult value.Can anyone tell me how to figure out this problem?