\frametitle {OpenBTS USRP Clocking}\framesubtitle {Kalibrator Example}
\begin{block}{Example of running {\tt kal}}
\begin{lstlisting}
[openBTS@openBTS kal-0.2]# ./kal -f 946600000 -u
USRP side: B
FPGA clock: 52000000
Decimation: 192
Antenna: RX2
Sample rate: 270833.343750
average [min, max] (range, stddev) -2197.789062 [-2431, -1843] (588, 146.761444)
\end{lstlisting}
\end{block}
The value {\bf -2198 should be used as FREQOFF constant in Transceiver/USRPDevice.cpp}