Drive 10 MHz PXI Backplane Clock External

This setting locks the PXI-5600 downconverter to an external reference signal and drives that external signal to the PXI backplane. This option only works when the PXI-5600 downconverter is in slot 2 of the PXI chassis. On the PXI-5600 downconverter front panel, connect the external reference signal to the FREQ REF IN connector and the 10 MHz OUT connector to the PXI 10 MHz I/O connector.