+ long fpga_master_clock_freq() const;
+
+ /*!
+ * Tell API that the master oscillator on the USRP is operating at a non-standard
+ * fixed frequency. This is only needed for custom USRP hardware modified to
+ * operate at a different frequency from the default factory configuration. This
+ * function must be called prior to any other API function.
+ * \param master_clock USRP2 FPGA master clock frequency in Hz (10..64 MHz)
+ */
+ void set_fpga_master_clock_freq (long master_clock);