Differences Between Advance and Reference Trigger in NI-RFSA Driver

Updated Jan 17, 2019

Reported In



Issue Details

What are the differences between Advance Trigger and Reference Trigger for VSA devices? 


  • Advance Trigger indicates that device is in readiness for the next record. Most commonly used with List Mode
  • Reference Trigger is the moment when record is taken. Reference trigger give you ability to set a number of pretrigger samples (See image 1). Use it when you need synchronous multi record acquisition.

Image 1. Reference trigger position related to Digitized Waveform.

Additional Information

Vector Signal Analyzer State Diagram
The following figure shows the acquisition engine state diagram for the digitizer in your NI-RFSA composite device. This state diagram models the NI-RFSA composite device when it acquires data in the I/Q mode.