Solution
The PXIe‑6570/6571 is designed to receive triggers through the PXI_Trig lines in the chassis. In the Digital Pattern Editor, you can configure the trigger source to use one of these lines.
Using Another PXIe Module
If you have another PXIe module with PFI ports, you can route the external signal to the PXI_Trig lines using DAQmx Connect Terminals. This allows the Digital Pattern instrument to receive the external trigger indirectly.
Using the Embedded Controller SMB Port
If your PXIe chassis does not contain another module, but your embedded controller includes an SMB trigger input, you can also route that signal to the PXI_Trig lines using DAQmx Connect Terminals.
Alternative Method: Using a DIO Pin as the Trigger
If routing through PXI_Trig is not possible, you can use a DIO pin on the Digital Pattern instrument as a trigger input. In your pattern, use a Match opcode with Jump_If to advance execution when the pin reads High.
Below is an example implementation:
In this example, DUTPin1 is marked High when the Match condition becomes True, allowing the pattern to proceed and output the data waveform.
Note: This method requires 80 cycles to detect the match. At the fastest time set (10 ns), the minimum response time is approximately 800 ns (80 cycles × 10 ns).