Agilent Technologies 1200 Infinity Series - Page 90

90 Agilent 1200 Infinity Series DAD User Manual
5 Optimizing the Detector
Optimizing for Sensitivity, Selectivity, Linearity and Dispersion
Figure 20 Optimization of Wavelength Setting
A wide bandwidth has the advantage of reducing noise by averaging over a
wavelength range — compared to a 4 nm bandwidth, the baseline noise is
reduced by a factor of approximately 2.5, whereas the signal is about 75 % of a
4 nm wide band. The signal-to-noise ratio for a 30 nm bandwidth is twice that
for a 4 nm bandwidth in our example.
Figure 21 Influence of Bandwidth on Signal and Noise
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