Fast Fourier Analysis - Fluke NORMA 4000 Operator's Manual

amplitude variations. The actual graph depends on the configured range and average time
(see the section, "General Setup," in chapter 7). Prominent variations in the graph
indicate errors in the measuring system.
To view the recorder:
1. Press measuring keys Σ or 1...n and WAV to call up the values, for example,
current measured at channels 1 to 3.
2. Press measuring key Recorder.
The display shows a recording of the measured values.
3. Press the function key rms/h01 again.

Fast Fourier Analysis

Fast Fourier transformation (FFT) allows for the analysis of the individual frequency
components of a signal. The harmonics may be viewed in graphical or tabular format as
percentages of fundamental H01.
1. Press measuring keys 1...n to call up the desired values, that is, those values
measured at channel 1.
2. Press measuring key Fast Fourier analysis.
The frequency analysis is shown in the following screen.
8
Measuring Process

Fast Fourier Analysis

esn049.gif
8-19