Definition of Terms
130
Keysight
N4375D Lightwave Component Analyzer, User’s Guide
Definition of Terms
Absolute frequency response uncertainty
The maximum difference between measured
of a device under test and the actual (true) responsivity,
expressed in dBe.
Conditions:
as specified.
Any change in the cabling after calibration add to the
specified absolute frequency response uncertainty.
Measurement:
Based on a reference RF O/E receiver.
Average output power (optical)
The (actual or nominal) average output power from the LCA
optical output.
Average output power range (optical)
The nominal (selectable) range for
Average output power stability (optical)
The variation of the optical
Average output power (optical)
P
over time, calculated as
max
t
P t
min
t
P t
–
2
-------------------------------------------------------------------------
where max
t
{} and min
t
{} are the maximum and minimum
value over time t.
Conditions:
Time period as specified after modulator auto
bias (“modulator optimization”) is performed with the
selected wavelength. Other conditions as specified.
Measurement:
Using an average power meter with averaging
time set to 1 s.
N O T E
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