Horiba Scientific FluoroMax-4 Operation Manual page 50

® ®
FluoroMax -4 & FluoroMax -4P with USB rev. D (30 Jul 2012)
Results
The measurements pro-
vided the following spec-
trum and data:
S (peak signal at 397 nm)
peak
S (background noise at 450 nm)
background
N (Peak-to-peak noise of background at 450 nm*) 405 c
p–p
*Measured with a separate kinetic scan
N gives an rms noise of the background signal equal to
p–p
N
rms, background
Comparison
The HORIBA
ter-Raman S/N of
S
S
peak
N
S
background
601 988
14
4901
We assert that our method is correct, although it gives a lower value. The second meth-
od only takes into account the detector noise and the shot noise of the electronics. On
the other hand, by using the background total intensity as a measure of noise, our meth-
od is more representative of a real "live" experiment where noise is also influenced by
factors such as the quality of the optics and scattered light in the system. These addi-
tional factors influence the ability to measure a very low signal from a sample and
ought not be ignored.
405
5
81
method gives a wa-
Scientific
S
background
14 376
376
601 988 cps
14 376 cps
The other method similarly gives a wa-
ter-Raman S/N of
S S
S
peak background
N N
rms, background
601 988 14 376
81
7254
3-14
System Operation