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Dynamic range (logging mode)
Frequency Response
Linearity
Keysight N774xC Series Multiport Power Meter User's Guide
For a fixed power meter range, dynamic range D specifies the difference
between the maximum displayable value P
power meter range and the minimum measurable power P
Conditions: As specified.
Measurement: P
is 3 dB above the nominal power meter range value
max
(that is, in the +0 dBm power meter range P
+10 dBm range with P
max
root-sum-square (RSS) of the specified "Noise 2 sigma (dark)" (see,
2 sigma (dark)
on page 44 and "Drift (dark)" (see,
RSS is calculated in linear units (Watts).
Specifies the frequency f
function is above a defined cutoff level.
The transfer function is the measured optical amplitude on a modulated
sinusoidal optical input divided by the actual amplitude over modulation
frequency, expressed in dB.
Conditions: Cutoff level as specified. Other conditions as specified.
Specifies the relative difference between the measured (displayed) power
ratio D
/D
and the actual (true) power ratio P
x
0
the power level from the reference level P
Powers expressed in Watts.
Excluding "Noise pp (dark)" (see,
(dark)" (see,
Drift (dark)
Conditions: Reference power level P
conditions as specified.
in dBm in the corresponding
max
max
= +10 dBm. P
, dBm is calculated as the
min
up to which the power meter's transfer
resp
x
to an arbitrary level P
0
Noise pp (dark)
on page 42).
= 0.01 mW (-20 dBm). Other
0
Definition of Terms
in dBm.
min
is +3 dBm), except for the
Noise
Drift (dark)
on page 42.
/P
, caused by changing
0
.
x
on page 44 and "Drift
3
43
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