HP 8712C User Manual

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Measuring Impedance Using the Smith Chart
The amount of power reflected from a device is directly related to the
impedances of both the device and the measuring system. Each value of the
complex reflection coefficient p uniquely defines a device impedance; for
example, p = 0 only when the device impedance and the system impedance
are exactly the same.
The Smith chart is a tool used to map the complex reflection coefficient p to
the DUT’s impedance. In a Smith chart, the complex impedance plane is
reshaped to form a circular grid, from which the resistance and reactance
can be read. (See Figure 3-23 for more information on the Smith chart.)
Marker features on the analyzer display the resistance and reactance in units
of ohms, and the equivalent capacitance or inductance in units of farads or
henrys.
This section uses an example measurement to describe how to measure the
input impedance of a Elter.

HP 8712C Specifications

General

Brand	HP
Model	8712C
Category	Measuring Instruments
Language	English