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Definition of Terms
N O T E
N O T E
138
• dB
: the square of the
A/W
or
• dB
is defined correspondingly to dB
W/A
Differences of responsivities in dB
For O/E and E/O converters with linear relation between optical power
and electrical current, optical ratios in dBo have half the magnitude of the
electrical ratios in dBe.
Electrical loss of optical test set
The electrical (RF) signal loss of the optical test set between
Network Analyzer electrical port and LCA electrical port. LCA
set to E/E mode.
Conditions:
Frequency range as specified.
Frequency response repeatability
In repeated measurements of the (absolute) frequency
response under constant conditions, the repeatability ±Rep at
each modulation frequency is defined as twice the standard
deviation, StDev
, of the measured responsivities R
i
repetitions i:
Conditions: fixed cables and unchanged connections. Other
conditions as specified.
Measurement: using a stable DUT.
Keysight N4373D Lightwave Component Analyzer, User's Guide
Responsivity
R divided by 1 A/W,
2
R
10log
------------------ -
10
1A W
R
20log
------------------ -
10
1A W
A/W
or dB
are written as "dBe".
A/W
W/A
=
Rep
2 StDev
R
i
i
.
over the
i
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