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System Overview

R&S

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.

●

"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

Screen Elements

R&S ZVA Series User Manual

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