[Discuss-gnuradio] USRP might be broken but i don't know how to check

[ashar rizqi]

I have been transmitting random data using benchmark_tx and benchmark_rx. two things happen

1. the first transmission will be successful. If i stop the
command and retry it immediately nothing happens. I have to unplug and
plug the ursp back again and it works. Any ideas as to why that happens
and how do i fix it.
2. If we look at the lines showing how the transmission went where we can see 

ok=true  pktno=116 n_rcvd 59 n_right 59

Can some one give me details as to what this is showing me.
When I try the transmission a second or third time with the exact same
configuration the ok=false jumps up dramatically and the n_right fallls
dramatically. Any particular reason? I have tried different things to
fix it including changing the distance between the radios but it
doesn't work.

Any ideas as to what is going on?
You help is much appreciated