The display supports frequency and value bands. These bands highlight certain parts of the spectra in a different color. Frequency bands (horizontal) have a static or dynamic average (center frequency) and a delta width. Value bands (vertical) start at a dynamic or static value and either reach upward to the next value band or positive infinity.
The frequency bands can optionally be assigned to individual spectra or to all spectra. Value bands apply to all spectra.
Bands are configured in the properties dialog in the node Bands. There are two types of bands:
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You can allocate custom bands to any spectrum or all spectra
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InSpectra bands are bands that were configured in the calculation profile of an InSpectra module
If you have selected Band spectrum (instead of Original spectrum) in the main node FFT view, the Band spectrum tab appears. For settings see chapter Band spectrum.
Custom bands
In the custom bands tab, you define the frequency bands with a static or dynamic center frequency and a delta frequency. You can allocate a color to the band and a certain spectrum or all spectra.
In the diagram below, you can see the effects of the following settings.
Example:
InSpectra bands
If you use the FFT view with InSpectra, an additional InSpectra Bands tab will appear in this dialog.
Band settings
Display properties of the InSpectra bands can be determined in the Band settings area.
You can enable the collapsed appearance of the bands and whether the band is highlighted on hover. If this option is enabled, the band is highlighted in the display of the frequency spectrum and in the data table.
You can determine when the band labels are displayed (never, always or on hover) and what is displayed in the label. If you click the band label text field, a list of parameters appears that you can use for dynamic information in the label text.
The following parameters can be used:
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%n: Band name
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%nb: Band number
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%r: RMS value
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%p: Peak value
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%pf: Peak frequency
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%c: Center frequency
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%d: Delta frequency
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%l: Lower frequency
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%u: Upper frequency
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%ats: Alert status string
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%ams: Alarm status string
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%events: Alert and alarm status string
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%atrmsl: Limit of the RMS alert
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%atpeakl: Limit of the peak alert
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%amrmsl: Limit of the RMS alarm
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%ampeakl: Limit of the peak alarm
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%atrmspc: Percentage of the RMS alert limit
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%atpeakpc: Percentage of the peak alert limit
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%amrmspc: Percentage of the RMS alarm limit
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%ampeakpc: Percentage of the peak alarm limit
You can determine whether the bands should begin at the lower margin and where they should end (at the end of graph, at the peak or at the RMS value). The frequency bands can be shown as a shaded band or non-shaded band or only as a line at the center frequency.
The characteristic values of the bands can be displayed as lines, which can be highlighted on hover. Example:
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1 line for peak value 2 line for RMS value 3 line for frequency peak value, highlight on hover |
In addition, the band color can be adopted as a curve color both in the spectrum as well as in the main window.
Event settings
Display properties for events (alerts, alarms) can be set in the Event settings area. Dynamic label texts can also be defined for events. See band settings below.
Bands
The bands configured in an InSpectra profile are shown in the table below in the dialog. The name, center frequency and delta frequency are already defined in the InSpectra profile and can no longer be changed here. The color and visibility can still be changed here.
