Hi Dennis, First you need to use the niUSRP property node to make the USRP routing the signal at the at Trig In/Out port as Input. If you have that, you will receive your trigger as a Trig In. Assuming you are using the Reference FPGA as a basis for your design drop a FGPA I/O node on your diagram an select “Board Interface -> Trig In” as it’s source. The Boolean wire represents the state of your Trig In port and you can use it to drive the e.g. the external trigger inputs of the sync Vis for the RX and or TX chain (depending on the intended use case).
Regards Lars [NI] Lars Amsel Principal Software Engineer SDR Test & Measurement Group +49351206931427 | ni.com<https://www.ni.com/> From: Jurk, Dennis <[email protected]> Sent: Wednesday, 6 May 2026 14:56 To: Amsel, Lars <[email protected]>; [email protected] Cc: Kaya, Altug <[email protected]> Subject: [EXTERNAL] AW: USRP X410 TRIG LabView Hello Lars, thank you for your reply. I have seen the mentioned topic in the USRP X410 User Manual, which roughly outlines how you can replace the wiring in the timed loop where the Trig Out Routing VI is located. I was rather interested in how I can use TRIG IN to interfere in the Tx/Rx Loop to control when I receive and when I stop receiving with the trigger. Best regards Dennis Jurk Von: Amsel, Lars <[email protected]<mailto:[email protected]>> Gesendet: Mittwoch, 29. April 2026 12:51 An: Jurk, Dennis <[email protected]<mailto:[email protected]>>; [email protected]<mailto:[email protected]> Cc: Kaya, Altug <[email protected]<mailto:[email protected]>> Betreff: RE: USRP X410 TRIG LabView Dennis, According to the documentation https://www.ni.com/docs/de-DE/bundle/usrp-x410/page/signal-routing.html you should use niUSRP property node on the host and wire an input to it. In the reference FPGA you have to modify the TRIG OUT VI on the top right. The default wiring ist PPS -> Trig OUT and you have to change that to match your design. You have to remove the existing wiring as you want to use trigger as output. Regards Lars From: Jurk, Dennis <[email protected]<mailto:[email protected]>> Sent: Tuesday, 28 April 2026 12:49 To: [email protected]<mailto:[email protected]> Cc: Kaya, Altug <[email protected]<mailto:[email protected]>>; Jurk, Dennis <[email protected]<mailto:[email protected]>> Subject: [EXTERNAL] [USRP-users] USRP X410 TRIG LabView Hello everyone, I would like to use the TRIG IN functionality of the X410 to start the receiving of data on a trigger. How do I implement this/modify the Reference FPGA image to achieve this? I would love to get some guidance regarding this issue. Thank you in advance! Best regards Dennis Jurk
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