Configuration Files
Most of the programs settings are stored into a XML file. There are three main XML configurations files: NPXLab.xml, USERNAME.xml (where USERNAME is a placeholder for the Current Windows Logged User) and Navigator.xml. The most important one is the NPXLab.xml. A typical path for it is C:\Documents and Settings\All Users\Application Data\NPXLab\NPXLab.xml or c:\ProgramData\NPXLab\NPXLab.xml. All settings stored into NPXLab.xml affect the NPXLab behaviour for all the users.
The following table describes its main settings.
GROUP |
ITEM |
FILE |
Default value |
Path |
Note |
Filters(1) |
Notch Frequency |
NPXLab.xml |
50 |
DOC->Filters->Notch |
The powerline AC frequency, expressed in Hertz |
Filters(1) |
Number of default filter values |
NPXLab.xml |
8 |
DOC->Filters->DefaultCount |
The number of LPF and HPF default values |
Filters(1) |
High Frequency Default Values (of the Low Pass Filter) |
NPXLab.xml |
DOC->Filters->LPFn |
n varies from 0 to DOC->Filters->DefaultCount (see above). Values are frequencies multiplied by the Scaling value, so that 750 means 7.5 Hertz if Scaling is 100 |
|
Filters(1) |
Low Frequency Default Values (of the High Pass Filter) |
NPXLab.xml |
DOC->Filters->HPFn |
n varies from 0 to DOC->Filters->DefaultCount (see above). Values are frequencies multiplied by the Scaling value, so that 10 means 0.1 Hertz if Scaling is 100 |
|
Filters(1) |
Scaling factor of filter values |
NPXLab.xml |
100 |
DOC->Filters->Scaling |
This represents the scaling value of the filters: true filters values are those indicated in the LPFn and HPFn field divided by Scaling value |
Filters(1) |
Number of filters loaded in the Processing Chain at program startup |
NPXLab.xml |
0 |
DOC->Filters->TypeCount |
The number of time domain filters loaded at program startup |
Filters(1) |
The nth filter type to be loaded |
NPXLab.xml |
DOC->Filtern->Type |
n varies from 0 to DOC->Filters->TypeCount (see above). Actually the supported values are (may vary depending on the NPXLab Suite edition): Cheby, Recursive, FIR and FFT. |
|
Filters(1) |
Default filter Enable flag |
NPXLab.xml |
DOC->Filtern->Enabled |
n varies from 0 to DOC->Filters->TypeCount (see above). Determines if the filter is enabled or disabled at program startup |
|
Filters(1) |
Zero Phase filter flag |
NPXLab.xml |
DOC->Filtern->ZeroPhase |
n varies from 0 to DOC->Filters->TypeCount (see above). Determines if the filter uses the forward and backward technique to approximate a zero phase behaviour |
|
Filters(1) |
High Pass Filter Cutoff frequency |
NPXLab.xml |
DOC->Filtern->HPFDef |
n varies from 0 to DOC->Filters->TypeCount (see above). Determines the initial setting of the High Pass Filter (expressed in Hz) |
|
Filters(1) |
Low Pass Filter Cutoff frequency |
NPXLab.xml |
DOC->Filtern->LPFDef |
n varies from 0 to DOC->Filters->TypeCount (see above). Determines the initial setting of the Low Pass Filter (expressed in Hz) |
|
Filters(1) |
Notch Filter Status |
NPXLab.xml |
0 |
DOC->Filtern->NotchDef |
n varies from 0 to DOC->Filters->TypeCount (see above). Determines the initial setting of the Notch Filter (0 = disabled, 1 = enabled) |
Spectra(2) |
Spectral Band Name |
NPXLab.xml |
noname |
DOC->Spectrum->BandnName |
n varies from 0 to 7. The item indicates the name of the nth spectral band (e.g. alpha, beta, ...) |
Spectra(2) |
Spectral Band Low Frequency |
NPXLab.xml |
n * 4 |
DOC->Spectrum->Band_n_Freq_Lo |
n varies from 0 to 7. The item indicates the low frequency of the nth spectral band. |
Spectra(2) |
Spectral Band High Frequency |
NPXLab.xml |
(n + 1) * 4 |
DOC->Spectrum->Band_n_Freq_Hi |
n varies from 0 to 7. The item indicates the high frequency of the nth spectral band. |
Spectra(2) |
Total Band Low Frequency |
NPXLab.xml |
1 |
DOC->Spectrum->TotalBand_Lo |
The item indicates the low frequency of the total band to be used for the computation of the relative power. |
Spectra(2) |
Total Band High Frequency |
NPXLab.xml |
32 |
DOC->Spectrum->TotalBand_Hi |
The item indicates the high frequency of the total band to be used for the computation of the relative power |
ERP(1) |
Default Sensitivity |
NPXLab.xml |
10 |
DOC->ERP->Sensitivity |
This item indicates the startup sensitivity of the Traces view at viewer startup, and when in Normal View mode. Smaller values indicates smaller sensitivites |
(1) Can only be modified by editing the XML configuration file.
(2) Can be modified by editing the XML configuration file AND from the NPXLab Menu: Spectrum | Defined Bands.
Note that a non valid XML file might cause the NPXLab Suite to crash: use an XML editor which is able to check the correctness of the file and make a backup copy of it before editing it. The NPXLab.xml is the one that stores the main (few) general program settings. The Navigator.xml file (a typical path for it is C:\Users\USERNAME\AppData\Local\NPXLab) stores all the customization of the navigation bas (colors, positions, size, etc...). Each user, then, has a different XML configuration file (USERNAME.XML) in which are stored personal settings (fonts, colors, line styles, etc...) relative to the NPXLab Views.
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