Computing Absorbance Data Points 39
4
the data sent to the Millennium
32
software database. A noise filter of 1 second is the
default value, which provides a good signal-to-noise ratio for most chromatographic
separations.
Note the following with regard to filtering data:
• The noise filter is a digital (low pass) filter.
• The filter calculates a data point that is a modified rolling average for a wavelength
over a number of readings.
• The filter values are comparable to the effects of a 0.1- to 3-second RC filter.
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