Parker EME
Setting up Compax3
192-120114 N5 C3I22T11 June 2008 273
Other settings
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3
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(1) Excitation
Serves to set the excitation signal of the frequency response measurement.
(2) Permissible following error (only for frequency response measurement)
The resulting following error is increased by the injection of the excitation signal
during the frequency response measurement. In order to allow for this, the permis-
sible following error window can be enlarged so that the measurement can be ma-
de. After the end of the measurement, this is reset to the original value.
(3) Selection of the kind of analysis of the measurement results
Depending on the fact whether frequency spectra or frequency responses are
measured, the following types of analyses are available:
For frequency spectra:
(a) Spectrum
(b) Spectrum cumulated
(c) cascade diagram
For frequency responses:
(d) noise frequency response
(d) noise frequency response cumulated
Non cumulated measurement (a & d)
The measured data are displayed directly. This is especially suitable if you wish to
analyze the effects of changes on the measurement results directly and promptly.
The disadvantage is however a smaller noise distance (quality) and an increased
sensitiveness of the measurement towards unique disturbances.
Cumulated measurement (b & e)
An average is taken from all measurements in the result memory. This reduces the
influence of random signals and disturbances extremely (improvement of the quali-
ty). The number of measurements from which the average is taken, is set with the
Size of the result memory (see page 275).
Comparison of two frequency spectra without and with cumulation
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