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It is similar to the linear amplitude format, but both the positive value and negative value can be displayed.
Y-axis: no unit.
Applicable typical measurement: time domain and auxiliary input voltage for maintenance purposes.
g) Imaginary part format
Only display the imaginary part of measurement data.
Y-axis: no unit.
Applicable typical measurement: impedance measurement in design of matching network.
2) Polar coordinate format
The polar coordinate format shown in Fig. 4.24 includes the amplitude and phase information. The vector value can be read in the
following method.
a) The amplitude of any point is determined by the displacement of this point relative to the central point (or zero point). In the
default mode, the amplitude is a linear scale, and the excircle scale is set as 1.
b) The phase of any point is determined by the angle relative to the X-axis.
c) The frequency information can only be read through the marker. The default marker format includes the real part and
imaginary part. The marker dialog box can be opened in the marker/analysis menu. Other formats can be selected in the
advanced marker menu.
Fig. 4.24 Polar Coordinate Format
3) Smith chart format
Smith chart shown in Fig. 4.25 is a tool to map the reflection measurement data of the tested device into impedance.
Each point of the chart represents a complex impedance composed of the real resistance (R) and virtual reactance (±jX). The
resistance, reactance, equivalent capacitance and inductance can be read through the marker.
