Integration and System Considerations
PFI Lines

PFI lines are multipurpose programmable function input/output lines. These lines serve as connections to virtually all internal timing signals. NI RF signal generators have up to six digital lines that can accept or generate a trigger, generate a marker, accept or generate a reference clock. The function of each PFI line is independent.

To connect external signal generators to the PFI lines, use the niRFSG Configure Ref Clock VI or the niRFSG_ConfigureRefClock function to route external signals to internal sources.

Use the niRFSG Export Signal VI or the niRFSG_ExportSignal function to route internal signals to the PFI lines on the front panel.

Caution  If you enable a PFI line for output, do not connect any external signal source to it; doing so can damage the device, the computer, and the connected equipment.