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Making Measurements
Using Markers
To Use Smith Chart Markers
For greater accuracy when using markers in the Smith chart format, activate the discrete marker mode.
Press
.
To u s e Smith c h a r t f ormat:
1. Press .
2. Press and turn the front panel
knob, or enter a value from the front panel keypad to read the resistive and reactive components of the
complex impedance at any point along the trace. This is the default Smith chart marker.
The marker annotation tells that the complex impedance is capacitive in the bottom half of the Smith
chart display and is inductive in the top half of the display.
• 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 to show the real and imaginary parts of the device impedance (the series
resistance and reactance, in ohms) at the marker. Also shown is the equivalent series inductance or
capacitance.
• Choose to show the complex admittance values of the active marker in rectangular
form. The active marker values are displayed in terms of conductance (in Siemens), susceptance, and
equivalent parallel circuit capacitance or inductance. Siemens are the international unit of
admittance and are equivalent to mhos (the inverse of ohms).
Figure 1-21 Example of Impedance Smith Chart Markers
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