Keysight Technologies N4373D User Manual page 142

Definition of Terms
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Responsivity values are converted from
linear values by: linear = 10
decibels by: decibel = 20*log
Modulated optical power
The amplitude of a harmonic optical power modulation. The
modulated optical power is calculated from the peak optical
power P and the average optical power P
max
in Watts: P = P
mod max
in dBm: P = 10-log(P
mod,dB
P
opt
P
P
Modulated optical power divided by average optical power is a value
between 0 (no modulation) and 1 (full modulation). See also
modulation index).
For full modulation, modulated optical power equals average optical
power.
Operating frequency range (optical test set)
The modulation frequency range for which the LCA optical test
set (including optical transmitter and receiver) is designed to
supply give measurement results.
OMI (optical modulation index)
Specifies the Modulated optical power
output power (optical).
Condition: modulation frequency as specified.
Keysight N4373D Lightwave Component Analyzer, User's Guide
Decibel (dBm, dBo, dBe)
decibel/20
. The average is converted back to
(linear).
10
– P
avg
/ 1mW).
mod
(t) harmomic
oscillation
max
avg
divided by
values to
,
avg
P
mod
t
OMI (optical
Average