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Making Measurements
Measuring Laser Drift
maximum wavelength and maximum power may not have
occurred simultaneously.
Display shows absolute minimum values since the drift
measurement was started. This measurement gives the shortest
wavelength and smallest power measured. The laser line of
interest may have since drifted to a greater value. Note that the
minimum wavelength and minimum power may not have
occurred simultaneously.
Display shows the total drift from the reference since the drift
measurement was started. Values represent the minimum
wavelength and power drift values subtracted from the
maximum drift values.
5 In the List by WL and List by Power displays, use the and softkeys
to view the reference values (wavelength and power values of each laser
line before the test was started).
During the measurement, you can change the display mode to Peak WL,
List by WL, List by Power, or Avg WL. When List by WL or List by Power is
selected, the signal list is sorted by reference values and not by the
current, maximum, or minimum values.
To restart the drift measurements, press RESET. This resets the refer-
ence values.