Omicron Lab Bode 100, User Manual, Page: 41 / 133

Reflection Coefficient Γ :
Voltage Standing Wave Ratio VSWR
Tg as well as Q(Tg) are calculated in the same way as for the gain measurement (see 7.1 Gain
measurement introduction on page 35).
7.3 Vector Network Analysis
7.3.1 Transmission / Reflection
The Transmission / Reflection measurement mode is designed to measure the S-parameters S21 and
S11 in the 50 Ω domain.
The Transmission / Reflection measurement mode allows to measure both, Transmission
(Gain) and Reflection (Impedance). It is possible to select e.g. a Gain measurement in Trace
1 and an Impedance measurement in Trace 2.
Bode 100 will then sequentially measure Gain
and Impedance.
Therefore some hardware settings are available twice. Once for the Gain measurement and once for
the Impedance measurement.
Also the hardware setup dialog is available twice. Once for the Gain measurement and once for the
impedance measurement.
For details on how the Gain is calculated, please check 7.1 Gain measurement introduction on
page 35.
Calibration in the Transmission / Reflection measurement mode
The Transmission / Reflection measurement mode does not require calibration to perform a
measurement. However, to remove the influence of your connection cables the measurement mode
offers Gain (Thru) as well as Impedance (Open, Short, Load) calibration. Gain calibration applies to a
Gain measurement and Impedance calibration applies to a Impedance/Reflection/Admittance
measurement. When measuring at high frequency or with long cables it is strongly recommended to
perform a calibration. For more details regarding the Gain calibration please refer to
8 Calibration on
page 69.
Measurement types and applications
OMICRON Lab 41