BUCHI NIRCal - Manual (Page 98)

NIRCal 5.5 Software Manual
98 NIRCal 5.5 Manual, Version A
In this way it is possible to enhance the differences in the data set.
NOTE
Having applied Divide by Spectrum the selected spectrum (spectrum No. 10 in this example) must not
be put into the C-Set; its ordinate values will contain 1.0 only. The selected spectrum is copied into the
pretreatment once. The selected spectra contains all previous pretreatments.
Type
This pretreatment is not depending on the calibration wavelengths.
Standard Normal Variate
The SNV transformation centers each spectrum and then scales it by its own standard deviation
(mean zero and variance equal to one).
It corrects shifts on the ordinate.