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Multi-Module RF Instrument Trigger Source

Updated Apr 30, 2025

Reported In

Hardware

PXI-5661
PXIe-5663
PXIe-5665
PXIe-5667
PXIe-5668
PXI-5670
PXI-5671
PXIe-5672
PXIe-5673
PXI-5142
PXIe-5622
PXIe-5624
PXI-5421
PXI-5441
PXIe-5442
PXIe-5450
PXIe-5451

Driver

NI-RFSA
NI-RFSG

Issue Details

Which submodule of a multi-module instrument shares and receives the trigger signals on the PXI Backplane?

Solution

To locate this information you need to take look at the documentation of the multi-module instrument for example the PXIe-5667. If you look through the PXIe-5667 Features, you can find the description of all individual modules. Also, here you can find the block diagrams which depict if the individual module manages the trigger sharing functionality. Indicators for this are the PXI_CLK100, the PXI_Trig lines, and the front panel PFI connectors.

PXIe-5622 Block Diagram

The following table shows you which RFSA and RFSG devices use which submodule to export and receive trigger signals from the PXI Backplane:

Type	Hardware	Trigger Source
RFSA	PXI-5661	PXI-5142
	PXIe-5663/5663E	PXIe-5622
	PXIe-5665	PXIe-5622
	PXIe-5667	PXIe-5622
	PXIe-5668	PXIe-5624
RFSG	PXI-5670	PXI-5421
	PXI-5671	PXI-5441
	PXI-5672	PXIe-5442
	PXIe-5673/5673E	PXIe-5450/5451

Additional Information

For any additional instruments, which are not mentioned in this article, please refer to the most up-to-date NI RF Vector Signal Analyzers (NI-RFSA ) Help or NI RF Signal Generators (NI-RFSG) Help.
Selecting the right module for trigger sourcing/importing is essential when using the DAQmx Connect Terminals VI. If you select the wrong module the triggering won't work.

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