VIBROTEST 60
Acquiring and displaying measurements
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© VTEST60E July 2013 V4.46ff
C102 853.002
Page 79 of 168
5.2.3 Display of low frequencies
Fading out of frequency lines
At maximum zoom in the X-axis (Line spacing of display = Line
spacing of the measurement):
•
The frequency line at 0 Hz is not displayed; the amplitude
is „0„.
•
Depending on the settings in the spectrum Setup, the fol-
lowing are not displayed:
•
The 1
st
freq. line with a Uniform window.
•
The 1
st
and 2
nd
freq. lines with a Hanning window.
•
The 1
st
, 2
nd
and 3
rd
freq. lines with a Flat-top window
Frequency range between 0 – High-pass frequency
All input signals are assessed between 0 - high-pass frequency
by an 8-pole, digital high-pass filter.
Frequency components in this frequency range are strongly
attenuated.
Displaying a Cepstrum
The first line is set at “0”.
Advice:
This applies also to the function Envelope Analysis / BCS. (see
chapter 5.3)
