VRT: A successfull try

Hi All,

I locked the transmitter and receiver with REF and PPS (USRP2). Then I
transmitted a short QAM modulated sequence using basic daughter-boards.
The received signal constellation differed at most 0.45degrees/0.08dB
in two consecutive runs. The decimation/interpolation factor was 4 i.e.
the net sample-rate was 25MHz.