Cross Talk
Minimum Level
in Test Band
Maximum Level
in Test Band
Cross Talk(R)
Spacing
λi
Spacing
Cross Talk(L)
Test Band
nominal wavelength
Wavelength
Level [dB]
Test Band
Port A
Port B
Parameter
SPACING
TEST BAND
Procedure
• Perform a bottom search within the range of parameter Test_Band/2 while centering
on reference wavelength (
λ
i) of each channel and obtain the bottom level (LBi).
• Perform a peak search within the range of parameter Test_Band/2 while centering on
the point (
λ
i-
λ
SP) that is obtained by subtracting the parameter SPACING from the
reference wavelength
λ
i of each channel. Then, obtain the peak level (LPLi).
• Perform a peak search within the range of parameter Test_Band/2 while centering on
the point (
λ
i+
λ
SP) that is obtained by adding the parameter SPACING to the reference
wavelength
λ
i of each channel. Then, obtain the peak level (LPRi).
• Use the values obtained in the above procedure to obtain the left and right cross talks
(XTLi, XTRi) of each channel from the following equations:
XTLi=Lbi−LPLi
XTRi=Lbi−LPRi
Appendix 6 Details of Optical Filter Analysis Function
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