Anritsu MS9740B - Page 199

5.7 Measuring Optical Amplifier
5-49
5
Measurement Functions
Mean Fitting:
Fitting Method Utilizing a Linear Function
The mean of the data for λ2 and λ3 in Figure 5.7.1-2 (b) is found (mW
units). The product of this value and optical band filter correction value
is Pase.
Figure 5.7.1-2 Finding Pase
The input range and the data set with the optical amplifier measurement
are as follows.
This data is input in the Parameter dialog box.
Table 5.7.1-1 Setting Range of the Parameters in the Parameter Dialog
Box
Item Min. Max. Unit
Fitting Span*
1
0.10
100.00
nm
Masked Span*
2
0.10
100.00
nm
Pin Loss
–10.00
10.00
dB
Pout Loss
–10.00
10.00
dB
NF Cal
0.100
10.000
None
O.BPF Lvl Cal
0.00
30.00
dB
O.BPF BW
0.00
999.99
nm
Pol Loss*
3
–10.00
10.00
dB
*1: The Fitting Span is set within the following range so as to fit within
the screen’s wavelength range.
Signal Wl + Fitting Span/2 = < Stop
Signal Wl – Fitting Span/2 > = Start
Wavelength (nm)
Level (dBm)
(a) Gaussian Fitting
l
1
l
2
l
s
l
3
l
4
Pase
Masked Span
Fitting Span
Wavelength (nm)
Level (mW)
l
1
l
2
l
s
l
3
l
4
Pase
Masked Span
Fitting Span
(b) Mean Fitting