1.3 Glossary
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Figure 1.3-3 Example of Measurement at VBW 100Hz
When measuring intense modulated light using an external trigger, set
the value of VBW to a higher value than the modulation signal.
If the VBW value is lower than the modulation frequency, the level is not
measured accurately.
Measured Level Range
The measured level range is the maximum and minimum levels that the
analyzer can measure. It depends on the wavelength due to the
characteristics of the analyzer's internal optical systems. In addition, the
minimum level is very much impacted by internal electrical noise. A
narrow VBW and smoothing/ averaging processing reduce the impact of
this noise.
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