CPB (Constant Percentage Bandwidth) Analysis

CPB analysis is used for fractional octave spectral processing of signals coming from the input channels of FFT spectrum analyzers (in real time or recorded time realization view mode), as well as for viewing various spectral characteristics of signals.

CPB analysis is used for dividing signals into basic constituents in the frequency area in octave, 1/3-, 1/12-, 1/24-octave spectral bands. The software is used for noise spectral analysis within acoustic and vibrational measurements.

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Долеоктавный спектральный анализ ZETLAB

Main Software Features

  • Measurement of signal levels in octave, 1/3-, 1/12-, 1/24-octave spectral bands. Number of bands – 17, 51, 204, 406, respectively;
  • Octave and 1/3-octave filters comply with IEC 61260:1995;
  • Harmonic constituent analysis;
  • Recording and reading the program configuration to facilitate measurements repeatability;
  • Integrated AFC correction.
  • Analyzed signal averaging: 0.1 to 10 s;
  • Averaging types: linear, exponential;
  • Correction types: linear correction of an amplitude-frequency characteristic, corrections А, B, C, D;
  • Signal integration/differentiation;
  • Analyzed signal representation type; spectral density, root-mean-square or peak value;
  • Calculation and display of a pass-through characteristic, common pass-through and pass-through harmonics;
  • Calculation and display of spectrograms in a 2-dimensional alignment chart, displaying levels by their colors, and in a 3-dimensional map;
  • Calculation and display of diagrams with maximum, minimum and average values for a set period;
  • Possibility to apply a reference diagram to evaluate the characteristics of transition processes.

Supported Hardware

Input data for CPB analysis are represented by digital data of ZETLAB server channel.

CPB analysis is included into the following software packages:

CPB analysis is included in the Signal Analysis software group.