YASKAWA AQ6370B - Page 357

App-45
IM 735302-01E
Appendix
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App
Index
BOTTOM WL / BOTTOM LVL
Parameter
THRESH
MODE DIFF
Procedure
Obtain the wavelength
λ
’i of the mode bottom of each channel and its signal optical level
LBi.
XdB_NOTCH_WIDTH/CENTER WAVELENGTH
Parameter
ALGO
Procedure
According to the settings of the parameter ALGO, obtain the xdB notch width
(xdB_Notch_Width) of each channel and its center wavelength/frequency
(Center_Wavelength).
NOTCH(B)
Wavelength
Level [dB]
Center Wavelength
Bottom Level
xdB
Port A
Port B
xdB Notch Width
Obtain the width (xdB_Notch_Width) between the two points, which are above the bottom
level of each channel by the parameter THRESH_LEVEL, and its center wavelength
(Center_Wavelength).
NOTCH(P)
Wavelength
Level [dB]
Port A
Port B
Level peak
between
xdB
λ
i
Mode Bottom
xdB Notch Width
Center Wavelength
λ
i-1
and
λ
i+1
λ
i+1
λ
i-1
Mode Bottom
Mode Bottom
Obtain the width (xdB_Notch_Width) between the two points, which are below the higher
point of either the left peak level or the right peak level of each channel by the parameter
THRESH_LEVEL, and its center wavelength/frequency (Center_Wavelength).
Appendix 6 Details of Optical Filter Analysis Function