Keysight Technologies N4373D User Manual page 139

N O T E
Keysight N4373D Lightwave Component Analyzer, User's Guide
Average output power uncertainty (optical)
The maximum difference between actual (true)
power (optical) and the nominal (selected) average output
power.
Conditions: After modulator auto bias ("modulator
optimization") performed with the selected wavelength. Other
conditions as specified.
Measurement: Using an average power meter with averaging
time set to 1 s.
Average power measurement uncertainty (optical)
Maximum difference between measured average (over time)
optical power and true average optical power at the LCA optical
input.
Measurement: Comparison with an average power meter with
averaging time set to 1 s.
Average power measurement range (optical)
The range for the average optical power where the specification
for Average power measurement uncertainty (optical)
Decibel (dBm, dBo, dBe)
A ratio in decibel (dB) is calculated as 10-log
cases:
• dBo: specifically the ratio of optical powers ('o' for 'optical').
• dBe: specifically the ratio of electrical powers ('e' for
'electrical').
• dBm: power level related to 1 mW (electrical or optical).
Differences of powers in dBm are written as "dBo" for optical powers or
"dBe" for electrical powers.
Definition of Terms
Average output
applies.
{ratio}. Special
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