App-28
IM AQ6370D-01EN
DRIFT(MEAS)
Wavelengths measured previously are used as references to display wavelength/level
changes (drifts).
Explanations of display items
NO: Channel number
REF WL: Reference wavelength of the channel
(previous wavelength measured)
MEAS WL: Center wavelength of the channel
DIFF MAX (wavelength): Maximum value of the relative wavelength to the reference
wavelength of the channel
DIFF MIN (wavelength): Minimum value of the relative wavelength to the reference
wavelength of the channel
REF LVL: Reference level of the channel (previous measurement level)
MEAS WL: Measurement level of the channel
DIFF MAX (level): Maximum value of the relative level to the reference level of
the channel
DIFF MIN (level): Minimum value of the relative level to the reference level of
the channel
Reference wavelength/level can be changed under the following conditions.
• Active trace waveform data when MAX/MIN RESET is set by the parameter.
• The first waveform data measured when wavelength axes (SPAN WL/START WL/
STOP WL) were changed according to the measurement conditions.
Appendix 4 Detailed Explanations of WDM Analysis Function
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