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App-26
IM AQ6370D-01EN
Items to be Displayed When DISPLAY is Set
ABSOLUTE
Results of analyses are displayed in absolute values.
Explanations of display items
NO:
Channel number
WAVELENGTH: Center wavelength of the channel
LEVEL:
Level of the channel (peak level – noise level)
OFFSET WL: Relative wavelength to the wavelength of the reference channel (REF)
OFFSET LVL: Relative level to the wavelength of the reference channel (REF)
SPACING:
Wavelength spacing with the adjacent channel
LVL DIFF:
Level difference from the adjacent channel
NOISE:
Noise level of the channel
SNR:
SNR value of the channel
• OFFSET WL/LVL is displayed when the parameter CH RELATION is “OFFSET.”
SPACING and LVL DIFF are displayed when the parameter CH RELATION is
“SPACING.”
• When ABSOLUTE and CH RELATION are OFFSET, it is possible either to set the
reference channel to the mode peak with the highest level or to set a mode peak that
will become the reference arbitrarily.
• When REF CH is HIGHEST
The WDM mode peak with the highest level shall be the reference. The wavelength
difference and level difference (LOG) compared to it shall be OFFSET WL and
OFFSET LVL of each WDM mode peak.
• When REF CH is ***
REF CHANNEL*** shall be the reference. The wavelength difference and level
difference (LOG) against it shall be OFFSET WL and OFFSET LVL of each WDM
mode peak. (If the ***th mode peak does not exist, the WDM mode peak on the
longest wavelength shall be the reference.)
Appendix 4 Detailed Explanations of WDM Analysis Function