XdB stop band
Wavelength
Level [dB]
xdB
xdB stop-band
λi
nominal wavelength
Port A
Port B
Parameter
THRESH
Procedure
Obtain the width (xdB_stop-band) that centers on the reference wavelength
λ
i of each
channel and that is located below by the parameter THRESH_LEVEL both on the left
and on the right.
XdB pass-band
xdB Passband
xdB
Test Band
Minimum Level
in Test Band
λi
nominal wavelength
Wavelength
Level [dB]
Port A
Port B
Parameter
THRESH
TEST BAND
Procedure
• Perform the bottom search within the range of parameter Test_Band/2 by centering on
reference wavelength
λ
i of each channel and obtain the bottom level (LBi).
• Obtain the width (xdB_pass-band) that is below the bottom level LBi obtained in the
above procedure by the parameter THRESH _LEVEL.
Appendix 6 Details of Optical Filter Analysis Function
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