Configuring data acquisition, About data acquisition, More about data files and buffers – MTS Series 793 User Manual
Page 421
8. Repeat steps 5 through 7 for all other channels.
After the initial command definition is set you can change the end level and test time/rate controls on the
main Basic TestWare panel while the test is running.
Configuring Data Acquisition
About Data Acquisition
With the Basic TestWare data acquisition controls, you can collect the following types of test data:
•
Timed data acquisition—records the output of all selected signals at a specified time interval.
•
Peak/Valley data acquisition—records the output of all selected signals when the software detects a peak
or valley in the master signal that you specify.
•
Running Max/Min data acquisition—records the highest peak and lowest valley for all selected signals
during a test.
•
Level Crossing data acquisition—records the output of all selected signals each time the defined master
signal changes by a specified amount.
Data collected during your test is written to a buffer. When the buffer gets full, the data is saved to your
specified data file.
More About Data Files and Buffers
When you set up data acquisition, you specify the signals for which data is acquired and the method of
buffering data before it is recorded in a file.
Buffers
Each type of buffer offers different operational characteristics:
•
The buffer size specifies the maximum number of data elements that the buffer will store before data is
written to disk. (A data element includes the data from each selected signal.) You can set the buffer size
between 1 and 16,000 data elements (the default is 2048).
•
Acquiring and saving data at fast rates can cause the computer to become sluggish (slow to respond to
selections). If the acquisition rates are too fast, data over-run can occur. If this happens, a message will
be displayed.
Linear buffer
A linear buffer records data until it is full, and then saves the data to disk. The size of the buffer determines
how much data is acquired before it is written to disk. Data is continuously saved to disk until the test ends
or is stopped. When the test ends, any data in the buffer is sent to disk. The only limit is the amount of space
available on your hard drive.
MTS Series 793 Control Software 421
Basic TestWare Application