Keysight N4372E, Руководство пользователя

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56 Keysight N4372E Lightwave Component Analyzer User’s Guide
4 Making Measurements
3 If necessary, select a Differential or Single-Ended Measure Mode,
depending on the type of your DUT.
4 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.
5 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 by the LCA Optical Transmitter output port. (Use an external
power meter, or the LCA power meter to measure the optical power).
The optical power is also displayed at the bottom of the LCA
measurement setup screen.
6 If you are running measurements in an unstable environment, or need
extra accuracy or long term stability, make sure to select “EverySweep”
or “Continuous” (recommended) for Modulator Optimization.
Note that, optimizing every sweep adds about 1 second to each
measurement.
"Continuous" modulator bias optimization superimposes a 10 kHz pilot
tone onto the signal. This improves the short and long term stability of
the modulator operating point.