By the time so far, I have several different kinds of outcomes by
different attampts even I tried with the same command. It seems that
it never has a "stable" same outcome. The problems I have met so far include the following (these are
different experiences that I have had when running the tests at
different times):
-1, One of the USRPs always can not receive, even though I attempt to power
cycled it or stop receiving and restart again without power cycling. I labled it as a "Problem" one.
-2, Both USRPs can transmitting and receiving for a short time(around
2mins), and then one USRP(the same "problem" one as mentioned in result 1) failed to receive while the other one was still
transmitting. The failed one could not get recovered, even though I
attempted to power cycled it or stop receiving and restart again
without power cycling.
There's a similar case that if I stoped receiving of the
"problem" USRP and restart receiving again without power cycling . The
"problem" USRP could receive for the first two or three times, but
after I attamped to restart receving for the fourth time(for example).
The "Problem" USRP can not receive packges.
-3, Yesterday morning before lunch time,both USRPs can
miraculously transmitting and receiving for a relatively long
time(around 10-15mins) without any part of them failed (transmitting
and receiving in both direction). While after coming back from lunch, however, the problem came
out again exactly same as the first one above. (i.e. transmitting and
receiving only in one direction).
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Example 2) non-OFDM example (under ../gnuradio-examples/digital/benchmark_tx&rx)
-1, Yesterday, there's no problems if I kept on transmitting from one to the other
without switching the tx&rx parts. If I stoped receiving and
restarted to receive without power cycling, the receiver would keep on receiving.
-2, The problem will come out after I switched the TX and RX
role of USRPs. I had to power cycle the USRP which is going to receive,
otherwise, it will not work. (Actually, both USRPs exhibit problems depending on which one is the receiver and
this USRP has to be power cycled in order to receive packge correctly)
Above are
my test results. I was wondering if it might be concluded as the hardware problems. If you have any comments or ideas, please let me know.
Thanks in advance!
Sincerely,
Yuan