Keysight Technologies N4373D, User Manual

Page: 104 / 176

Making Measurements
102
Keysight
N4373D Lightwave Component Analyzer, User’s Guide
3 Select the wavelength at which you are testing.

If you want to use external laser sources, select the optional
External Input, and enter the wavelength of the external
source.
4 Set the power of the Laser to be applied to the test circuit.

If you are using the external source input, enter the value for
the power emitted from the LCA optical output port. (Use an
external power meter, or the LCA power meter).
5 If you are running measurements in an unstable
environment, or need extra accuracy or long term stability,
make sure to select “EverySweep” or “Continuous” for
Modulator Optimization.

Please note, optimizing every sweep adds about 1 second to
each measurement. Continuous optimization uses a pilot
tone. Measuring with or without the pilot tone may affect
your measurement.

We also recommend, if you are using continuous
optimization, that you also perform a “User Calibration”.
The system is calibrated with a default setting. You can
determine the default setting by going to the tools page,
choosing “Default”, and pressing “Run”.
6 Select the Optical Input you are using.
7 If you have optical components, such as attenuators, fiber
optic cables or splitters, between the optical input and
output and your device under test, open and enable the
Optical Path Deembedding.

Here you can enter the parameters for the optical path
directly.
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