Andor Technology iXon Ultra 897 User Manual page 88

If you perform an operation 'out of sequence', the system will remind you what to
do by launching an Acquisition Error Dialog Box.
Provided you do not change the acquisition parameters, the scans you take for
background and reference are automatically used for subsequent data acquisitions
whenever you perform Take Signal.
The calculations for the various data types assume the following definitions:
• Signal: Data in uncorrected Counts, acquired via Take Signal.
• Background: Data in uncorrected Counts, acquired in darkness, via Take
Background.
• Reference: Background corrected data, acquired (usually for the purpose of
computing a material's reflection, transmission or absorption characteristics) via
Take Reference. Reference data are normally acquired from the light source,
without the light having been reflected from or having passed though the
material being studied.
CHOOSING THE DATA TYPE
Acquisition Error Dialog Box
Section 4 . 6
Page 88