spFRF: Signal Processing for Frequency Response Functions User Guide

Introduction

spFRF™ stands for “Signal Processing for Frequency Response Functions.” The primary purpose of this IMAT™ application is to process time response data into spectral functions such as frequency response, coherence, auto-spectra, and cross-spectra. spFRF can read time response functions from ADF files, Universal files, or from the MATLAB workspace, and can write time response and spectral functions to the same. spFRF can process continuous measurements, as well as triggered measurements with the ability to preview and accept or reject each frame. Although the name implies that spFRF produces frequency response functions, it can also be used to generate the auto-spectra of response-only datasets.

spFRF is organized into two modules, the Setup module and the Results module. In the Setup module, the user selects the channels and time range to be processed and specifies the signal processing parameters, such as the blocksize, window, number of frames, and trigger delay. After the signal processing is completed, the generated spectral functions are reviewed and saved in the Results module. Both of these modules also have fairly extensive plotting capabilities.

This user guide will explain the spFRF IMAT application procedures and features.

 

spFRF, AFPoly, spVIEW, and IMAT are trademarks of ATA Engineering, Inc. Other trade names are trademarks of their respective organizations.