How to Measure Power Power Measurement
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition 101
How to Choose the MinMax Mode
MinMax mode measures the incoming power and displays the minimum
value measured, [Pmin], and the maximum value measured, [Pmax]. The
difference between these values,
∆P, is displayed 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.
You can choose three 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.
•<Window> mode, which compares each new measured value with the
maximum and minimum values of each of the previous N samples. When a
new measurement is taken it is added to a buffer containing the previous N
samples and the oldest measurement is deleted.
•<Refresh> mode, which adds each new measurement to a buffer. The
minimum and maximum values, in this buffer, are displayed. After N samples
are added to the buffer, the buffer resets and a new buffer is created.
You can use Window and Refresh modes, for example, when you are searching
for or setting the position of minimum PDL.
For a Dual Power Sensor, you cannot set the averaging time of the slave
channel, channel 2, directly. By default, the averaging time of the slave
channel, channel 2, is the same value as that for the master channel,
channel 1. See Table 10 on page 107 for more details.
NOTE
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