Simple TX/RX test problem

GNU Radio
1

I made a GRC flow graph like this image
http://lh5.ggpht.com/_byQV8nmc5FA/TOJtmsZcuiI/AAAAAAAAAQY/ylUoDqXpXbw/s800/스크린샷.png

And the result is like this image
http://lh5.ggpht.com/_byQV8nmc5FA/TOJtm9GDpXI/AAAAAAAAAQc/1MsP1mXFUNQ/s800/스크린샷-Top%20Block.png

The upper is the sender side, the lower is the receiver side
How can I receive normally?

2

Your TX amplitude is effectively zero, see the docs in the usrp sink
block.

Also, do not use a throttle block when you have a physical device (such
as a usrp) in the stream.

-josh