MTS Series 793 Application - Manual (Page 248)

MTS MultiPurpose TestWare®
Model 793.71/72 Time History Output Process
Command Processes 248
5. Select one of the following from the dropdown menu:
About Time History Output and Controller Rates
Time History rates supported by the controller are dependent on the system rate
specified in your controller’s hardware interface file:
* This sampling rate (409.6 Hz) is not supported by Series 494 hardware,
and is not recommended. When using this sampling rate with a 1024 Hz
system rate, the function generator and RPC data acquisition may not
stay synchronized after a hold and resume. There can be an additional
phase shift between the drive and response after each hold and resume.
The up-sampling filters are designed to begin cutting off the signal at 35% of the
sampling rate and to be 60 dB down at 65% of that rate. When a time history is
entered into this process, the software will check the signal’s sampling rate and
determine whether it can be supported. If not, an error message will be generated.
After being digitized, the signals are run through a digital filter whose cutoff is
40% of the requested sampling frequency, and then down-sampled to the
requested sampling rate.
Follow Input The response file format will follow the drive time history file.
Float The response file will be written in floating point data format.
Short Integer The response file will be written in short integer data format.
S YSTEM R ATE (H Z ) F ILE R ATE (H Z )
1024 1024, 512, 409.6*, 256, 204.8, 128, 102.4
2048 2048, 1024, 512, 409.6, 256, 204.8, 128, 102.4
4096 2048, 1024, 512, 409.6, 204.8