App-35
IM AQ6376-01EN
Appendix
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App
Index
Details of Analyses
(1)PEAK LVL (2)PEAK WL
(6) RIPPLE
WIDTH
TH[dB]
(5) CROSS
TALK
(4)SPEC WD
(3)MEAN WL
(5) CROSS
TALK
λ
cs [nm]
λ
cs [nm]
(1) Peak level (PEAK LVL):
value of the level at the waveform peak position
(2) Peak wavelength (PEAK WL):
value of the wavelength at the waveform peak
position
(3) Center wavelength (MEAN WL): value of the center wavelength at the threshold
value TH
(4) Spectrum width (SPEC WD):
spectrum width at the threshold value TH
(5) Cross talk (CRS TALK)
In the case of THRESH / PEAK LV algorithms
Obtain the value of the level on the reference wavelength (MEAN WL for THRESH
and PEAK WL for PEAK LV). Also, obtain the value of the level at the wavelength
which is ±
λ
CH SPACE[nm] away from the reference wavelength. Then, set the
difference in level value between the two to the cross talk.
In the case of ITU-T algorithms
Set the ITU-T grid wavelength, which is nearest to the peak wavelength, to the
reference wavelength. Set the difference between the bottom level within the range
of the reference wavelength ±
λ
SEARCH AREA[nm] and the peak level within
the range of the position ±
λ
CH SPACE[nm] away from the reference wavelength
±λSEARCH AREA[nm] to the cross talk.
(6) Ripple width (RIPPLE WD):
Perform a spectrum width search. Set the value of
the peak level – bottom level within the obtained
spectrum width to the ripple width.
Note
• Unless the parameter “MODE DIFF” is set to a value smaller than uneven portions of a
waveform regarded as a ripple, RIPPLE = 0 will result.
• RIPPLE = 0 if the parameter setting is “THRESH” < “MODE DIFF”
Appendix 6 Details of Optical Filter Analysis Function