System information

Blastware Advanced Module
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6–56 Blastware Operator Manual
d. Upper Frequency Limit
Use the up and down arrow keys to define the Upper Frequency Limit you want to process. The
allowable limit is 2 – 300.
e. Broad Band Noise Added to Signal
(1) Percentage of Peak
Define the Percentage of Peak (from 0 to 100) to be added to the signal to prevent low level noise
from creating false peaks – the default five percent is a nominal number. Increasing this number
will lower the sharp peaks, especially if they are produced by the division of two small numbers,
which is how the final Transfer Function frequency is calculated.
A report will appear containing the standard event information, the two time-based recordings, the
Spectral Density of the recordings, the Transfer Function, and the Peak Frequency:
For more information, refer to the following publications for a complete explanation of natural
frequencies and related calculations.
Dowding, C.H., 1985, “Blast Vibration Monitoring and Control,” chapters 5 and 7, Prentice-Hall,
Inc., Englewood Cliffs, N.J.