Anritsu MN4765B, Operation Manual

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3-6 PN: 10410-00742 Rev. H O/E Module MN4765B OM
3-3 O/E Measurements Operation
3-3 O/E Measurements
The setup shown in Figure 2-2 can also be applied to O/E measurements of a
photodiode or photo-receiver DUT. Photodiodes demodulate the electrical
signal from the optically modulated light in a fiber optic transmission
network. An external laser source, used with a characterized modulator,
provides the input to the O/E DUT. The response of the characterized
modulator is de-embedded from the setup using the O/E application menu.
The characterization file for the modulator can be generated using the
MN4765B. See
Appendix A for instructions on generating an s2p file.
Once the response of the modulator is removed, the S21 parameter displays
the ratio of the output electrical signal to the input optical modulated signal.
Transfer Function Measurement of a MN4765B Module using the VectorStar
VNA is shown in
Figure 3-3 and Figure 3-4 .
Figure 3-3. Transfer Function Measurement (Magnitude and Phase) of a
MN4765B Module with Option 70 (MN4765B-0070) using the
VectorStar VNA. Similar plots can be obtained using Option 71 or
Option 72 modules. The Option 40 and 43 modules have reduced
bandwidth.