Keysight Technologies N4373D, Руководство пользователя

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User Interface Reference
76
Keysight
N4373D Lightwave Component Analyzer, User’s Guide
• Measure runs an extra calibration measurement step during
the measurement setup.

Before running the first measurement, you need to ensure
the instrument has a valid electrical calibration, as described
in “Calibrating the Network Analyzer before Measurements”
on page 85.

At the end of this calibration measurement, you can save the
calibration data.

This calibration is only used for the measurement setup for
which it is specified.
• Load prompts you to load data from a file saved as part of a
previous user calibration measurement.
Modulator Optimization
Select to how the modulator bias is to be optimized.
• Select “Once” to automatically optimize the modulator bias at
the first measurement after the measurement parameters
have been set.

This is sufficient for most measurements unless the tester is
subject to large changes in environmental conditions.
• Select “EverySweep” to optimize at the start of every
measurement sweep.

This increases accuracy, but also increases measurement
times.

This is the default modulator bias optimization mode, and is
used to calibrate and verify the instrument.
• Select “Continuous” to optimize while the measurement is
running.
With “Continuous” modulator bias optimization, a 10 KHz
pilot tone is applied to the signal. This improves the short
and long term signal stability of the modulator working
point.
The pilot tone will affect measurements with IFBW settings
of the network analyzer >1.5 kHz.

For IFBW settings of the network analyzer >3 kHz we
recommended you do not use “Continuous” modulator bias
optimization, Use "Every Sweep" or "Once" instead.
Forward RF Power [dBm]
Sets the RF power level for the source port.