MTS Multipurpose Elite - Manual (Page 148)

Task
Configure Data Acquisition (DAQ) Buffers
Data Acquisition (DAQ) Buffers Overview
Each DAQ activity has its own buffer that is used to move the user-defined data samples from the controller
to the application. The application then processes the data based on the Data Acquisition activity settings.
The choice of buffer type (linear or circular) depends on the type of test and the type of data that you want
to acquire.
• Linear buffers are typically used to acquire all the data over a period of time.
• Circular buffers are typically used to capture data associated with an event that occurs in a test.
For More Information
Task
Configuring the Buffer Type (p. 150)
Reference
Linear Buffers
A linear buffer is continually pulling data from the controller and transferring it to the application for
processing. Linear buffers are typically used when you want to capture all the data over a period of time.
The size of the buffer determines how much data is acquired before it is processed. When the DAQ activity
ends or the test stops, any data in the buffer is processed.
Linear Buffers Diagram
Linear buffer size
The buffer size specifies the maximum number of samples the buffer stores before data is processed.
Smaller buffer sizes provide quicker processing but may cause processor performance problems (especially
with high DAQ rates and/or high signal counts).
For most tests, keep the buffer size small to minimize the delay between acquiring data and displaying it
on a monitor display and performing calculations that use acquired data (such as a stress calculation).
148 | MTS TestSuite
Data Acquisition (DAQ)