User manual

Chapter 2 Analog Input

If the buffer becomes full, the DAQ device continuously discards the oldest

samples in the buffer to make space for the next sample. You can access this

data (with some limitations) before the DAQ device discards it. Refer to the

KnowledgeBase document, Can a Pretriggered Acquisition be

Continuous?, for more information.

When the reference trigger occurs, the DAQ device continues to write

samples to the buffer until the buffer contains the desired number of

posttrigger samples. Figure 2-6 shows the final buffer.

Figure 2-6. Reference Trigger Final Buffer

Pre-Trigger Samples

Reference Trigger

Post-Trigger Samples

Complete Buffer