Hi, I am trying to run an example from GNU Radio - examples/digital/packet/uhd_packet_rx and uhd_packet_tx with real USPR radios connected via an attenuator and a coax cable.
When I enable receiver by clicking on 'On' check box - the whole RX flow graph freezes. I think I manually adjusted transmit power and receive gain to be within reasonable ranges. By disabling different blocks one at a time I found is that polyphase clock sync inside packet_rx blocks kills the flow graph. It seems like the signal is gaited by Correlation Estimator and once it gets the correct sync word - the signal goes to Polyphase Clock Sync and CPU dies - it is 100% loaded all the time. If I run only loop back simulation the whole flow graph seems working fine. I wonder if noise or not very good signal destroys Polyphase Clock Sync. I installed GNU Radio via PyBOMS - 3.7.12git* version. Please help to find better idea on debugging it. with a different simple flow graphs Polyphase Clock Sync works fine even when I feed noise to it and signal later. Thanks, Vladimir
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