Anritsu MS9740B - Setting Items; Calculation Method

Chapter 5 Measurement Functions
5-8
5.2.1 Setting Items
This function has following setting items.
● Slice Level
This sets whether or not to find the number of longitudinal modes at
levels lowered some dB (Slice level) from the peak.
5.2.2 Calculation Method
The following equation is used to calculate the level L
1
, L
2
, L
3
---L
n
for all
measured wavelengths λ
1
, λ
2
, λ
3
---λ
n
in the spectrum. Here the peak
wavelength is bigger than the level lowered the level at Slice Level from
the peak of the measurement spectrum.
Figure 5.2.2-1 Wavelength and Level Used for Calculation
● Mean Wl
( )
∑
∑
⋅
=
Li
iLi
c
l
l
● FWHM
( )
∑
∑
−
==∆
i
cii
L
L
2
35.235.2
ll
σl
● Total Power
∑
=
i
LPow
L
1
L
2
L
3
L
4
L
i
l
1
l
2
l
3
l
4
…
l
i