Hi Jong, this can have a lot of reasons, but among these: Without starting and stopping both sink and source at exactly the same time, this flowgraph won't do what you probably think it'll do – there will be a random delay offset around your 1 s of delay. Instead of having the delay block, you should just use timed commands to start TX one second after RX, and resize the USRP Source's output buffer to be large enough to buffer more than a million items (that is very large).
Best regards, Marcus On 09/06/2017 11:32 AM, liu Jong via USRP-users wrote: > Hi all, > We connected usrp source and usrp sink directly with a USRP X310 as below: > > 内嵌图片 1 > Then run it and terminal print UUUUUUUUU all the time. > About version: > UHD_003.010.001.HEAD-0-g945fd653 > gnuradio-3.7.10.1 > > thank you > best regards > Jon > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
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