Differences

This shows you the differences between two versions of the page.

--- pa-fft-spectral-analysis [2026/01/26 21:36] – created reid_go-ci.com
+++ pa-fft-spectral-analysis [2026/02/02 17:10] (current) – reid_go-ci.com
@@ Line 1: / Line 1: @@
-Post Analyzer
+=====Post Analyzer=====
-FFT Spectral Analysis
+====FFT Spectral Analysis====
+The FFT Spectral Analysis uses applications of the digital signal processing theory for input channel signals with the option to enable data conditioning.
+{{::fft_spectrum.png?400|}}
+There are several signal computation options available for post processing.  The most used options are APS: Auto-power Spectra and FRF: Frequency Response Functions
+{{::fft_computation.png?400|}}
+Results of selected options:
+Computation of time stream data results are displayed in signal window and resulting plots appear when double clicked or dragged into compatible graph.
+{{::fft_analysis_streams.gif}}
+**Auto-power Spectra:** APS is our in-house terminology for a standard FFT analysis.  Displays frequency spectrum corresponding amplitude after FFT and data processing. Typically results are displayed in Hz (Frequency) on the X-axis,
+EU Y-Axis scaled to dB, LogMag, or Lin Mag.
+{{::fft.gif?}}
+**Frequency Response Function:** Often referred to as transfer functions, FRF describe the relationship between the input and output functions.  Result is commonly displayed in Frequency v Phase & Frequency v EU similar to FFT analysis.
+{{::frf.gif?}}