Chapter 5 Measurement Functions
5-78
●
Pin Loss (Offset)
This sets the level difference that is the level of the optical signal input
to MS9740B subtracted from the level of the optical signal actually
input to the optical amplifier.
This is used when measuring the optical input (Pin).
●
Pout Loss (Offset)
This sets the level difference that is the level of the amplified optical
signal input to MS9740B subtracted from the level of the amplified
optical signal actually output by the optical amplifier.
This is used when measuring the optical output (Pout).
●
O.BPF Lvl Cal
This sets the pass and filter levels for the optical bandpass filter
inserted between the optical amplifier and MS9740B. Set 0 dB when no
filter is inserted or when the characteristics of an optical amplifier
with built-in filter are evaluated.
●
O.BPF BW
O.BPF.BW sets the sets the ASE bandwidth when NF Select is Total.
When determining the noise figure when a narrow optical bandpass
filter is installed, set the filter bandwidth.
When determining the noise figure when a filter is not inserted, set the
ASE bandwidth.
The value set by O.BPF.BW uses items F
2
and F
4
of the NF (Total)
equation described in section 5.8.4.
When O.BPF.BW is set to 0 nm, the noise figure does not include beat
noise (F
2
) between ASE nor the ASE shot noise (F
4
).
●
NF Cal
This sets the calibration factor used at NF calculation.
Source
Amplifier
Analyzer
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