Now I've tried communication test a lot of times. I send a signal like below: https://picasaweb.google.com/lh/photo/Ntw86qudmxB4Qu07Z1TNvQ?feat=directlink
Then RX shows plot like below: https://picasaweb.google.com/lh/photo/H9RItzjpfemHy-OR2eQhQg?feat=directlink Most of time it's fine. However, very rarely, RX just shows white noise like below: https://picasaweb.google.com/lh/photo/jJdZIfm6Fd_mGNwu9QRBYQ?feat=directlink Every condition has not been changed I just turn USRP off and on and now I have this problem.
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