3) set times next pps (synchronously) gr_block_executor: source <gr_block uhd mimo source (1)> produced no output. We're marking it DONE.
This tells me that the alignment buffer is not finding a common timestamp among the 4 channels or one or more channels is not streaming (perhaps a timestamp/setup issue). What does your setup look like, is there a common pps and common reference split 4X to each usrp2? I forgot to add it to the notes but each device should have a common ref and pps attached to its front panel. Also, can you try to run with just two usrp2 to simplify the problem, does it work with 2 but not 3, 3 but not 4...?
Sometimes I also receive these errors that disappear when I power cycle the USRP2's: Error (usrp2 recv pirate loop): bad vrt header or unsupported packet type Error (usrp2 recv pirate loop): assertion failed: if_packet_info.has_tsi and if_packet_info.has_tsf in void usrp2_impl::io_impl::recv_pirate_loop(boost::shared_ptr<uhd::transport::zero_copy_if>, boost::shared_ptr<usrp2_mboard_impl>, size_t) at /home/dave/uhd/host/lib/usrp/usrp2/io_impl.cpp:97
Because the previous run did not exit cleanly and stop streaming, the recv loop is catching the middle of a packet from the previous run. This is safe to ignore.
-Josh _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
