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Chapter 2 2-23
Quick Start: Learning How to Make Measurements
Learning to Make Reflection Measurements
• Choose if you want the analyzer to show the linear magnitude and the
phase of the reflection coefficient at the marker.
• Choose if you want the analyzer to show the logarithmic magnitude and
the phase of the reflection coefficient at the active marker. This is useful as a fast
method of obtaining a reading of the log magnitude value without changing to log
magnitude format.
• Choose if you want the analyzer to show the values of the reflection
coefficient at the marker as a real and imaginary pair.
• Choose (the default marker format) to show the real and imaginary
parts of the device impedance at the marker. Also shown is the equivalent series
inductance or capacitance (the series resistance and reactance, in ohms).
Figure 2-15 Example Impedance Measurement Trace
• Measuring Admittance
To change the display to an inverse Smith chart graticule and the marker information to
read admittance, press .
As shown in Figure 2-16, the marker reads admittance data in the form G+jB, where G is
conductance and B is susceptance, both measured in units of Siemens (equivalent to mhos:
the inverse of ohms). Also shown is the equivalent parallel capacitance or inductance.
LIN MKR
LOG MKR
Re/Im MKR
R+ jX MKR
G+ jB MKR