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IFS 125M User Manual Bruker Optik GmbH
General 2
2.4 Data acquisition
The data acquisition is based on a free running delta-sigma A/D converter with 24 bit
dynamic range. The series of time equidistant samples is converted into samples equi
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distant in optical path difference, according to James Brault’s scheme. A digital signal
processor does the conversion in real time.
During natural phenomena such as sunset and sunrise in which the absorbance path is
considerably extended, the available measurement time is limited. Therefore, the dual
channel data acquisition technique in connection with a dichroic beamsplitter allows par
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allel data acquisition with two dedicated and optimized detectors in one or two different
spectral ranges.
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