Getting Started
30
Keysight
N4375D Lightwave Component Analyzer, User’s Guide
The optical input and output of the
Keysight
N4375D
Lightwave Component Analyzer use
angled connectors.
Depending on the option you ordered, you will also
have received two patchcords.
•
option 021 includes patchcords with an angled and a
straight connector
•
option 022 includes patchcords with two angled
connectors
Using the patchcord ensures the best “ripple” performance
(lowest ripple) for your measurements. Two or more, straight
connector interfaces in the optical measurement path can
cause optical cavities. These result in frequency dependent
interference effects (ripple), which may significantly degrade
the performance of the LCA. This may impact user
calibrations in OE and OO measurements. We recommend
you use the patchcords supplied to minimize the number of
straight connections.
Using the patchcords also keeps service costs down, as the
adaptor patchcord can be exchanged easily.
Angled contact connectors have up to 30 dB higher return
loss than straight connectors, and we recommend them for
best performance results. With angled fiber endfaces,
reflected light tends to reflect into the cladding, reducing the
amount of light that reflects back to the source.
Enabling and disabling the laser output
You can switch the Laser on and off by pressing the button
besides the Optical Output.
After the LCA application running on the network analyzer
has initialized it, the green LED besides the laser output
indicates whether the laser is emitting radiation. If the Laser
output is on, the green LED on the front panel of the
module is lit. If the Laser output is off, the green LED on
the front panel of the module is unlit.
This button overrides the internal laser ON/OFF settings.
Pressing this button during a measurement will cause errors in the results.
N O T E
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