NI 5412/5421/5422/5441/5442
PFI Connectors

PFI 0 and PFI 1 are bidirectional connectors. As an input, the PFI terminals can accept a trigger from an external source that can start or step through waveform generation.

As an output, the PFI lines can route a signal out from the following sources:

• Marker events
• Start trigger
• PLL Reference clock source
• Sample Clock Out (with /K where K is an integer used to divide the Sample clock)
• Script trigger (not available on the NI 5412)
• Started, Done, and Ready for Start events
• Sample clock timebase (with /N where N is an integer used to divide the Sample clock timebase frequency)

Refer to the device specifications for information about acceptable input signal characteristics for the PFI lines, as well as the output signal characteristics.

Note PFI 0 driver circuitry has been optimized to have lower jitter than PFI 1 for exporting the Sample clock or the PLL Reference clock source.