Keysight N7744A, User Manual

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cases, the Auto Gain should be turned off, as described in the
programming guide. This setting takes effect after setting the averaging
time on the port directly or via function parameters.
How to Choose the MinMax Mode
MinMax mode measures the incoming power and returns the minimum
value measured, and the maximum value measured. The difference
between these values, delta P, is returned in place of P, the power value.
This mode is intended principally for polarization dependent
measurements, but can be used for other types of measurement.
Figure 38 How to Choose the MinMax Mode
The Min/Max mode can be activated from both the Web Control
Interface and the N77xx Viewer, as well as with direct programming
described in the Programming Guide.You can choose two modes of
operation from the MinMax mode menu:
•
<Continuous> mode, which compares each new measured value with
the maximum and minimum values so far, and replaces them as
necessary.
This mode is useful for measuring the Polarization Dependent Loss
(PDL) of a component. Run the application while sweeping the
polarization of the source applied to the component.
•
<Refresh> mode, which records the minimum and maximum values
until N samples have been compared. After N samples the minimum
and maximum values are reset and a new MinMax measurement
begins.
You can use Refresh mode, for example, when you are searching for
or setting the position of minimum PDL.
Power Measurement
2
Keysight N774x Series 55