Anritsu MS9740B - How to Set the Noise Measurement Method

5.6 Measuring Laser Diode Modules
5-39
5
Measurement Functions
5.6.2 How to Set the Noise Measurement Method
In the Noise Parameter dialog box, set the noise level for the SNR
measurement and detection method.
Figure 5.6.2-1 Noise Parameter Dialog Box
Table 5.6.2-1 Setting Range of the Parameters in the Noise Parameter
Dialog Box
Item Min. Max. Unit
Fitting Span
0.01
20.00
nm
Masked Span
0.01
20.00
nm
Noise BW
0.1
1.0
nm
Noise Position
0.01
100.00
nm
Span
0.01
100.00
nm
Noise BW :
Band width used for noise level calculation
Detection Type:
Detection method for noise level
Area: Noise obtained from value of fitting curve at signal wavelength.
The fitting curve is calculated from the noise waveform in
the Noise Area
Point: Noise measured at position specified at Noise Point