31
4.9 Envelope setup
Setting up the parameters of Envelope spectrum and select the bearing data
from the bearing database.
Envelope On or Off :
Selecting Envelope On will enable the envelope
spectrum measurements, which is used for bearing fault frequencies analysis.
Because Envelope spectrum is calculated from Hilbert transform which takes
over a lot of CPU time, this algorithm will slow down the realtime performance
of your analyzer. Select Envelope On only when it is necessary.
Envelope Filter :
Select a band pass filter for envelope calculation. When a
bearing is developing defects on its components, we usually can observe high
frequency vibration which is the resonance frequencies of the bearing
components.
