R&S ZVA Series - Page 68

System Overview
R&S
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ZVA
68Getting Started 1145.1090.62 ─ 13
3.2.4.2 Conversion of Complex into Real Quantities
The results in the "Trace – Measure" menu can be divided into two groups:
●
"S-Parameters", "Ratios", "Wave Quantities", "Impedances", "Admittances", "Z-
Parameters", and "Y-Parameters" are complex.
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"Stability Factors" and "DC Input" values (voltages, PAE) are real.
The following table shows how the response values in the different Cartesian diagrams
are calculated from the complex measurement values z = x + jy (where x, y, z are func-
tions of the sweep variable). The formulas also hold for real results, which are treated
as complex values with zero imaginary part (y = 0).
Trace Format Description Formula
dB Mag Magnitude of z in dB |z| = sqrt ( x2 + y2 )
dB Mag(z) = 20 * log|z| dB
Lin Mag Magnitude of z, unconverted |z| = sqrt ( x2 + y2 )
Phase Phase of z φ (z) = arctan (y/x)
Real Real part of z Re(z) = x
Imag Imaginary part of z Im(z) = y
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