Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 71)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 71
Configure the XM-124 Standard Dynamic Measurement Module Chapter 2
Band Measurement Options
The Band measurement options apply to the Standard, Alternating gSE,
Continuous gSE, and Thrust Position measurement modes. These settings affect
the Band measurements that are derived from the FFT. There are four Band
measurements for each channel. Click Band to open the Band options dialog box.
TIP The frequency ranges for each Band measurement may overlap. For
example, Band 1 Minimum Frequency is 500 Hz and Maximum Frequency is
1500 Hz, and Band 2 Minimum Frequency is 1000 Hz and Maximum
Frequency is 3000 Hz.
In this field Values are Comments
Spectrum Option Choose whether the Band measurement is derived from the
conventional (standard) or gSE spectrum. This option is only available in Alternating gSE measurement
mode.
Frequency Units Choose Hz, CMP, or Orders. Enter the band’s Frequency Minimum and Maximum limits in
the selected units.
Measurement Choose the measurement (or calculation) performed to produce the
Band Value:
• Band Overall - The band value is the square root of the sum of the
squares (RSS) of the amplitude values for the bins that make up the
band.
• Maximum Peak - The band value is equal to the maximum bin
amplitude found within the band.